ProSnippets GeometryEngine
Language: C#
Subject: GeometryEngine
Contributor: ArcGIS Pro SDK Team <[email protected]>
Organization: Esri, http://www.esri.com
Date: 11/7/2025
ArcGIS Pro: 3.6
Visual Studio: 2022
// Use acceleration to speed up relational operations. Accelerate your source geometry only if you are going to test many other geometries against it.
// Acceleration is applicable for polylines and polygons only. Note that accelerated geometries take more memory so if you aren't going to get any
// benefit from accelerating it, don't do it.
// The performance of the following GeometryEngine functions are the only ones which can be improved with an accelerated geometry.
// GeometryEngine.Instance.Contains
// GeometryEngine.Instance.Crosses
// GeometryEngine.Instance.Disjoint
// GeometryEngine.Instance.Disjoint3D
// GeometryEngine.Instance.Equals
// GeometryEngine.Instance.Intersects
// GeometryEngine.Instance.Relate
// GeometryEngine.Instance.Touches
// GeometryEngine.Instance.Within
// Note: Needs QueuedTask to run
{
// accelerate the geometry to test
var acceleratedPoly = GeometryEngine.Instance.AccelerateForRelationalOperations(polygon);
// loop through all the geometries to test against
foreach (var testPolygon in testPolygons)
{
bool contains = GeometryEngine.Instance.Contains(acceleratedPoly, testPolygon);
bool within = GeometryEngine.Instance.Within(acceleratedPoly, testPolygon);
bool crosses = GeometryEngine.Instance.Crosses(acceleratedPoly, testPolygon);
// do something with the results...
}
}var g1 = PolygonBuilderEx.FromJson("{\"rings\": [ [ [0, 0], [10, 0], [10, 10], [0, 10] ] ] }");
double d = GeometryEngine.Instance.Area(g1);
// d = -100.0 //negative due to wrong ring orientation
d = GeometryEngine.Instance.Area(GeometryEngine.Instance.SimplifyAsFeature(g1));
// d = 100.0 // feature has been simplifed; ring orientation is correct// create a donut polygon. Must use the PolygonBuilderEx object
List<Coordinate2D> outerPts =
[
new Coordinate2D(10.0, 10.0),
new Coordinate2D(10.0, 20.0),
new Coordinate2D(20.0, 20.0),
new Coordinate2D(20.0, 10.0),
];
List<Coordinate2D> innerPts =
[
new Coordinate2D(13.0, 13.0),
new Coordinate2D(17.0, 13.0),
new Coordinate2D(17.0, 17.0),
new Coordinate2D(13.0, 17.0),
];
Polygon donut = null;
// add the outer points
PolygonBuilderEx pb = new(outerPts);
// add the inner points (note they are defined anticlockwise)
pb.AddPart(innerPts);
// get the polygon
donut = pb.ToGeometry();
// get the boundary
Geometry g = GeometryEngine.Instance.Boundary(donut);
Polyline boundary = g as Polyline;
// use the boundary...// buffer a point
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84);
Geometry ptBuffer = GeometryEngine.Instance.Buffer(pt, 5.0);
Polygon buffer = ptBuffer as Polygon;// create the circular arc
MapPoint fromPt = MapPointBuilderEx.CreateMapPoint(2, 1);
MapPoint toPt = MapPointBuilderEx.CreateMapPoint(1, 2);
Coordinate2D interiorPt = new(1 + Math.Sqrt(2) / 2, 1 + Math.Sqrt(2) / 2);
EllipticArcSegment circularArc = EllipticArcBuilderEx.CreateCircularArc(fromPt, toPt, interiorPt);
// buffer the arc
polyline = PolylineBuilderEx.CreatePolyline(circularArc);
Geometry lineBuffer = GeometryEngine.Instance.Buffer(polyline, 10);// creates a buffer around each MapPoint
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0),
];
Geometry ptsBuffer = GeometryEngine.Instance.Buffer(pts, 0.25);
Polygon bufferResult = ptsBuffer as Polygon; // bufferResult will have 4 partsList<Coordinate2D> coords =
[
new Coordinate2D(1, 2), new Coordinate2D(3, 4), new Coordinate2D(4, 2),
new Coordinate2D(5, 6), new Coordinate2D(7, 8), new Coordinate2D(8, 4),
new Coordinate2D(9, 10), new Coordinate2D(11, 12), new Coordinate2D(12, 8),
new Coordinate2D(10, 8), new Coordinate2D(12, 12), new Coordinate2D(14, 10)
];
List<Geometry> manyGeometries =
[
MapPointBuilderEx.CreateMapPoint(coords[9]),
PolylineBuilderEx.CreatePolyline([coords[0], coords[1], coords[2]], SpatialReferences.WGS84),
PolylineBuilderEx.CreatePolyline([coords[3], coords[4], coords[5]]),
PolygonBuilderEx.CreatePolygon([coords[6], coords[7], coords[8]])
];
Geometry manyGeomBuffer = GeometryEngine.Instance.Buffer(manyGeometries, 0.25);List<Coordinate3D> coords2 =
[
new Coordinate3D(0, 0, 0),
new Coordinate3D(0, 1000, double.NaN),
new Coordinate3D(1000, 1000, 50),
new Coordinate3D(1000, 1000, 76),
new Coordinate3D(0, 1000, double.NaN),
new Coordinate3D(0, 0, 0)
];
SpatialReference sr = SpatialReferences.WebMercator;
polyline = PolylineBuilderEx.CreatePolyline(coords2, sr);
// polyline.HasZ = true
// polyline.Points[1].HasZ = true
// polyline.Points[1].Z = NaN
// polyline.Points[4].HasZ = true
// polyline.Points[4].Z = NaN
Polyline polylineNoNaNZs = GeometryEngine.Instance.CalculateNonSimpleZs(polyline, 0) as Polyline;
// polylineNoNaNZs.Points[1].HasZ = true
// polylineNoNaNZs.Points[1].Z = 25 (halfway between 0 and 50)
// polylineNoNaNZs.Points[4].HasZ = true
// polylineNoNaNZs.Points[4].Z = 38 (halfway between 76 and 0)List<MapPoint> coords =
[
MapPointBuilderEx.CreateMapPoint(0, 0, 0, 0),
MapPointBuilderEx.CreateMapPoint(0, 1000),
MapPointBuilderEx.CreateMapPoint(1000, 1000, 10, 50)
];
SpatialReference sr = SpatialReferences.WebMercator;
polygon = PolygonBuilderEx.CreatePolygon(coords, sr);
// polygon.HasM = true
// polygon.Points[1].HasM = true
// polygon.Points[1].M = NaN
Polygon polygonNoNaNMs = GeometryEngine.Instance.CalculateNonSimpleMs(polygon, 0) as Polygon;
// polygonNoNaNMs.Points[1].HasM = true
// polygonNoNaNMs.Points[1].M = 25 (halfway between 0 and 50)Envelope env = EnvelopeBuilderEx.CreateEnvelope(1.0, 1.0, 5.0, 5.0);
Envelope centered = GeometryEngine.Instance.CenterAt(env, 2.0, 2.0);
// centered.Center.X = 2.0
// centered.Center.Y = 2.0
// centered.XMin = 0
// centered.YMin = 0
// centered.XMax = 4
// centered.YMax = 4
centered = env.CenterAt(4.0, 3.0);
// centered.Center.X == 4.0
// centered.Center.Y == 3.0
// centered.XMin == 2.0
// centered.YMin == 1.0
// centered.XMax == 6.0
// centered.YMax == 5.0// simple polygon
List<Coordinate2D> list2D =
[
new Coordinate2D(0, 0),
new Coordinate2D(0, 2),
new Coordinate2D(2, 2),
new Coordinate2D(2, 0),
];
polygon = PolygonBuilderEx.CreatePolygon(list2D, SpatialReferences.WGS84);
// verify it is simple
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polygon);
// find the centroid
MapPoint centroid = GeometryEngine.Instance.Centroid(polygon);
// centroid.X = 1
// centroid.Y = 1
// map Point
MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4, SpatialReferences.WGS84);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(5, 2, double.NaN, 7);
// pt1.HasZ = true
// pt1.HasM = true
centroid = GeometryEngine.Instance.Centroid(pt1);
// centroid.HasZ = true
// centroid.HasM = true
// pt1.IsEqual(centroid) = true
// multipoint
List<MapPoint> list = [pt1, pt2];
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(list);
// multipoint.HasZ = true
// multipoint.HasM = true
centroid = GeometryEngine.Instance.Centroid(multipoint);
// centroid.X = 3
// centroid.Y = 2
// centroid.HasZ = false
// centroid.HasM = false// clip a polyline by an envelope
Envelope env = EnvelopeBuilderEx.CreateEnvelope(2.0, 2.0, 4.0, 4.0);
LineSegment line = LineBuilderEx.CreateLineSegment(new Coordinate2D(0, 3), new Coordinate2D(5.0, 3.0));
polyline = PolylineBuilderEx.CreatePolyline(line);
Geometry clipGeom = GeometryEngine.Instance.Clip(polyline, env);// clip a polyline by a polygon
List<Coordinate2D> list =
[
new Coordinate2D(1.0, 1.0),
new Coordinate2D(1.0, 4.0),
new Coordinate2D(4.0, 4.0),
new Coordinate2D(4.0, 1.0),
];
polygon = PolygonBuilderEx.CreatePolygon(list, SpatialReferences.WGS84);
LineSegment crossingLine = LineBuilderEx.CreateLineSegment(MapPointBuilderEx.CreateMapPoint(0, 3), MapPointBuilderEx.CreateMapPoint(5.0, 3.0));
Polyline p = PolylineBuilderEx.CreatePolyline(crossingLine);
Geometry geometry = GeometryEngine.Instance.Clip(p, polygon.Extent);var sr = SpatialReferenceBuilder.CreateSpatialReference(4326);
var mapPoint = MapPointBuilderEx.CreateMapPoint(15, 60, sr);
// calculate
var polylineGeodetic = GeometryEngine.Instance.ConstructGeodeticLineFromDistance(GeodeticCurveType.Loxodrome, mapPoint, 5000000, 45, null, CurveDensifyMethod.ByLength, 300000);var sr = SpatialReferenceBuilder.CreateSpatialReference(4326);
var pt1 = MapPointBuilderEx.CreateMapPoint(60, 180, sr);
var pt2 = MapPointBuilderEx.CreateMapPoint(60, 0, sr);
// densify by length
var gl = GeometryEngine.Instance.ConstructGeodeticLineFromPoints(GeodeticCurveType.Geodesic, pt1, pt2, null, CurveDensifyMethod.ByLength, -3.356);
// densify by deviation
gl = GeometryEngine.Instance.ConstructGeodeticLineFromPoints(GeodeticCurveType.Geodesic, pt1, pt2, null, CurveDensifyMethod.ByDeviation, -0.0026);MapPoint inPoint = MapPointBuilderEx.CreateMapPoint(3, 4);
double angle = 0;
double distance = 10;
MapPoint outPoint = GeometryEngine.Instance.ConstructPointFromAngleDistance(inPoint, angle, distance);
// outPoint.X = 13
// outPoint.Y = 4
SpatialReference sr = SpatialReferences.WGS84;
inPoint = MapPointBuilderEx.CreateMapPoint(0, 0, sr);
angle = Math.PI;
distance = 1;
outPoint = GeometryEngine.Instance.ConstructPointFromAngleDistance(inPoint, angle, distance, sr);
// outPoint.X = -1
// outPoint.Y = 0List<Coordinate2D> firstLinePts = [new Coordinate2D(1.0, 1.0), new Coordinate2D(1.0, 4.0)];
List<Coordinate2D> secondLinePts = [new Coordinate2D(4.0, 4.0), new Coordinate2D(4.0, 1.0)];
List<Coordinate2D> thirdLinePts = [new Coordinate2D(0.0, 2.0), new Coordinate2D(5.0, 2.0)];
List<Coordinate2D> fourthLinePts = [new Coordinate2D(0.0, 3.0), new Coordinate2D(5.0, 3.0)];
// build the polylines
List<Polyline> polylines =
[
PolylineBuilderEx.CreatePolyline(firstLinePts),
PolylineBuilderEx.CreatePolyline(secondLinePts),
PolylineBuilderEx.CreatePolyline(thirdLinePts),
PolylineBuilderEx.CreatePolyline(fourthLinePts),
];
// construct polygons from the polylines
var polygons = GeometryEngine.Instance.ConstructPolygonsFromPolylines(polylines);
// polygons.Count = 1
// polygon coordinates are (1.0, 2.0), (1.0, 3.0), (4.0, 3.0), (4.0, 2.0)// build a polygon
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0),
];
Polygon poly = PolygonBuilderEx.CreatePolygon(pts);
// test if an inner point is contained
MapPoint innerPt = MapPointBuilderEx.CreateMapPoint(1.5, 1.5);
bool contains = GeometryEngine.Instance.Contains(poly, innerPt); // contains = true
// test a point on a boundary
contains = GeometryEngine.Instance.Contains(poly, poly.Points[0]); // contains = false
// test an interior line
MapPoint innerPt2 = MapPointBuilderEx.CreateMapPoint(1.25, 1.75);
List<MapPoint> innerLinePts = [innerPt, innerPt2];
// test an inner polyline
polyline = PolylineBuilderEx.CreatePolyline(innerLinePts);
contains = GeometryEngine.Instance.Contains(poly, polyline); // contains = true
// test a line that crosses the boundary
MapPoint outerPt = MapPointBuilderEx.CreateMapPoint(3, 1.5);
List<MapPoint> crossingLinePts = [innerPt, outerPt];
polyline = PolylineBuilderEx.CreatePolyline(crossingLinePts);
contains = GeometryEngine.Instance.Contains(poly, polyline); // contains = false
// test a polygon in polygon
Envelope env = EnvelopeBuilderEx.CreateEnvelope(innerPt, innerPt2);
contains = GeometryEngine.Instance.Contains(poly, env); // contains = true//
// convex hull around a point - returns a point
//
MapPoint pt = MapPointBuilderEx.CreateMapPoint(2.0, 2.0);
Geometry hull = GeometryEngine.Instance.ConvexHull(pt);
MapPoint hullPt = hull as MapPoint;
// nullPt.X = 2
// hullPt.Y = 2
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0),
];
//
// convex hull around a multipoint - returns a polygon
//
// build a multiPoint
Multipoint multiPoint = MultipointBuilderEx.CreateMultipoint(list);
hull = GeometryEngine.Instance.ConvexHull(multiPoint);
Polygon hullPoly = hull as Polygon;
// hullPoly.Area = 1
// hullPoly.PointCount = 5
//
// convex hull around a line - returns a polyline or polygon
//
List<MapPoint> polylineList = [MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(2.0, 2.0)];
// 2 point straight line
polyline = PolylineBuilderEx.CreatePolyline(polylineList);
hull = GeometryEngine.Instance.ConvexHull(polyline);
Polyline hullPolyline = hull as Polyline;
// hullPolyline.Length = Math.Sqrt(2)
// hullPolyline.PointCount = 2
// 3 point angular line
polylineList.Add(MapPointBuilderEx.CreateMapPoint(2.0, 1.0));
polyline = PolylineBuilderEx.CreatePolyline(polylineList);
hull = GeometryEngine.Instance.ConvexHull(polyline);
hullPoly = hull as Polygon;
// hullPoly.Length = 2 + Math.Sqrt(2)
// hullPoly.Area = 0.5
// hullPoly.PointCount = 4
//
// convex hull around a polygon - returns a polygon
//
// simple polygon
Polygon poly = PolygonBuilderEx.CreatePolygon(list);
hull = GeometryEngine.Instance.ConvexHull(poly);
hullPoly = hull as Polygon;
// hullPoly.Length = 4.0
// hullPoly.Area = 1.0
// hullPoly.PointCount = 5
// polygon with concave angles
List<MapPoint> funkyList =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.5, 1.5),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0),
MapPointBuilderEx.CreateMapPoint(1.5, 1.5),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
];
Polygon funkyPoly = PolygonBuilderEx.CreatePolygon(funkyList);
hull = GeometryEngine.Instance.ConvexHull(funkyPoly);
hullPoly = hull as Polygon;
// hullPoly.Length = 4.0
// hullPoly.Area = 1.0
// hullPoly.PointCount = 5
// hullPoly.Points[0] = 1.0, 1.0
// hullPoly.Points[1] = 1.0, 2.0
// hullPoly.Points[2] = 2.0, 2.0
// hullPoly.Points[3] = 2.0, 1.0
// hullPoly.Points[4] = 1.0, 1.0//
// pt on pt
//
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2.0, 2.0);
bool crosses = GeometryEngine.Instance.Crosses(pt, pt2); // crosses = false
crosses = GeometryEngine.Instance.Crosses(pt, pt); // crosses = false
//
// pt and line
//
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(5.0, 1.0),
];
Polyline line1 = PolylineBuilderEx.CreatePolyline(list);
crosses = GeometryEngine.Instance.Crosses(line1, pt2); // crosses = false
crosses = GeometryEngine.Instance.Crosses(pt2, line1); // crosses = false
// end pt of line
crosses = GeometryEngine.Instance.Crosses(line1, pt); // crosses = false
//
// pt and polygon
//
List<MapPoint> polyPts =
[
MapPointBuilderEx.CreateMapPoint(3.0, 2.0),
MapPointBuilderEx.CreateMapPoint(3.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 2.0),
];
Polygon poly1 = PolygonBuilderEx.CreatePolygon(polyPts);
crosses = GeometryEngine.Instance.Crosses(poly1, pt); // crosses = false
crosses = GeometryEngine.Instance.Crosses(pt, poly1); // crosses = false
//
// line and line
//
List<MapPoint> list2 =
[
MapPointBuilderEx.CreateMapPoint(1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0),
MapPointBuilderEx.CreateMapPoint(5.0, 3.0),
];
Polyline line2 = PolylineBuilderEx.CreatePolyline(list2);
crosses = GeometryEngine.Instance.Crosses(line1, line2); // crosses = true
//
// line and polygon
//
crosses = GeometryEngine.Instance.Crosses(poly1, line1); // crosses = true
//
// polygon and polygon
//
Envelope env = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(4, 4));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env);
crosses = GeometryEngine.Instance.Crosses(poly1, poly2); // crosses = falseSpatialReference sr = SpatialReferences.WGS84;
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, sr),
MapPointBuilderEx.CreateMapPoint(1.0, 4.0, sr),
MapPointBuilderEx.CreateMapPoint(4.0, 4.0, sr),
MapPointBuilderEx.CreateMapPoint(4.0, 1.0, sr),
];
List<Geometry> cutGeometries;
LineSegment line = LineBuilderEx.CreateLineSegment(MapPointBuilderEx.CreateMapPoint(0, 0, sr), MapPointBuilderEx.CreateMapPoint(3, 6, sr));
Polyline cutter = PolylineBuilderEx.CreatePolyline(line);
// polyline
polyline = PolylineBuilderEx.CreatePolyline(list);
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polyline);
cutGeometries = GeometryEngine.Instance.Cut(polyline, cutter) as List<Geometry>;
Polyline leftPolyline = cutGeometries[0] as Polyline;
Polyline rightPolyline = cutGeometries[1] as Polyline;
// leftPolyline.Points[0] = 1, 2
// leftPolyline.Points[1] = 1, 4
// leftPolyline.Points[2] = 2, 4
// rightPolyline.Points.Count = 5
// rightPolyline.Parts.Count = 2
ReadOnlySegmentCollection segments0 = rightPolyline.Parts[0];
// segments0[0].StartCoordinate = 1, 1
// segments0[0].EndCoordinate = 1, 2
ReadOnlySegmentCollection segments1 = rightPolyline.Parts[1];
// segments1.Count = 2
// segments1[0].StartCoordinate = 2, 4
// segments1[0].EndCoordinate = 4, 4
// segments1[1].StartCoordinate = 4, 4
// segments1[1].EndCoordinate = 4, 1
// polygon
polygon = PolygonBuilderEx.CreatePolygon(list);
isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polygon);
cutGeometries = GeometryEngine.Instance.Cut(polygon, cutter) as List<Geometry>;// densify a line segment
MapPoint startPt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint endPt = MapPointBuilderEx.CreateMapPoint(1, 21);
LineSegment line = LineBuilderEx.CreateLineSegment(startPt, endPt);
polyline = PolylineBuilderEx.CreatePolyline(line);
Geometry geom = GeometryEngine.Instance.DensifyByLength(polyline, 2);
Polyline result = geom as Polyline;
// densify a circular arc
MapPoint fromPt = MapPointBuilderEx.CreateMapPoint(2, 1);
MapPoint toPt = MapPointBuilderEx.CreateMapPoint(1, 2);
Coordinate2D interiorPt = new(1 + Math.Sqrt(2) / 2, 1 + Math.Sqrt(2) / 2);
EllipticArcBuilderEx cab = new(fromPt, toPt, interiorPt);
EllipticArcSegment circularArc = cab.ToSegment();
polyline = PolylineBuilderEx.CreatePolyline(circularArc);
geom = GeometryEngine.Instance.DensifyByLength(polyline, 2);
result = geom as Polyline;List<MapPoint> polyPts =
[
MapPointBuilderEx.CreateMapPoint(3.0, 2.0),
MapPointBuilderEx.CreateMapPoint(3.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 2.0),
];
Polygon poly1 = PolygonBuilderEx.CreatePolygon(polyPts);
Envelope env = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(4, 4));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env);
Geometry result = GeometryEngine.Instance.Difference(poly1, poly2);
Polygon polyResult = result as Polygon;
// polyResult.Area = 10.0
result = GeometryEngine.Instance.Difference(poly2, poly1);
polyResult = result as Polygon;
// polyResult.Area = 7.0//
// pt on pt
//
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2.0, 2.5);
bool disjoint = GeometryEngine.Instance.Disjoint(pt, pt2); // result is true
MultipointBuilderEx mpb = new();
mpb.AddPoint(pt);
mpb.AddPoint(pt2);
Multipoint multiPoint = mpb.ToGeometry();
disjoint = GeometryEngine.Instance.Disjoint(multiPoint, pt); // result is false
//
// pt and line
//
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(5.0, 1.0),
];
Polyline line1 = PolylineBuilderEx.CreatePolyline(list);
disjoint = GeometryEngine.Instance.Disjoint(line1, pt2); // result is true
disjoint = GeometryEngine.Instance.Disjoint(pt2, line1); // result is true
// end pt of line
disjoint = GeometryEngine.Instance.Disjoint(line1, pt); // result is false
//
// pt and polygon
//
List<MapPoint> polyPts =
[
MapPointBuilderEx.CreateMapPoint(3.0, 2.0),
MapPointBuilderEx.CreateMapPoint(3.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 2.0),
];
Polygon poly1 = PolygonBuilderEx.CreatePolygon(polyPts);
disjoint = GeometryEngine.Instance.Disjoint(poly1, pt); // result is true
disjoint = GeometryEngine.Instance.Disjoint(pt, poly1); // result is true
//
// line and line
//
List<MapPoint> list2 =
[
MapPointBuilderEx.CreateMapPoint(1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0),
MapPointBuilderEx.CreateMapPoint(5.0, 3.0),
];
Polyline line2 = PolylineBuilderEx.CreatePolyline(list2);
disjoint = GeometryEngine.Instance.Disjoint(line1, line2); // result is false
//
// line and polygon
//
disjoint = GeometryEngine.Instance.Disjoint(poly1, line1); // result is false
disjoint = GeometryEngine.Instance.Disjoint(line1, poly1); // result is false
//
// polygon and polygon
//
Envelope env = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(4, 4));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env);
disjoint = GeometryEngine.Instance.Disjoint(poly1, poly2); // result is false
// disjoint3D
SpatialReference sr = SpatialReferences.WGS84;
MapPoint pt3D_1 = MapPointBuilderEx.CreateMapPoint(1, 1, 1, sr);
MapPoint pt3D_2 = MapPointBuilderEx.CreateMapPoint(2, 2, 2, sr);
MapPoint pt3D_3 = MapPointBuilderEx.CreateMapPoint(1, 1, 2, sr);
MultipointBuilderEx mpbEx = new();
mpbEx.AddPoint(pt3D_1);
mpbEx.AddPoint(pt3D_2);
mpbEx.HasZ = true;
multiPoint = mpbEx.ToGeometry();
disjoint = GeometryEngine.Instance.Disjoint3D(multiPoint, pt3D_2); // disjoint = false
disjoint = GeometryEngine.Instance.Disjoint3D(multiPoint, pt3D_3); // disjoint = trueMapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2.0, 2.0);
MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(4.0, 2.0);
//
// pt and pt
//
double d = GeometryEngine.Instance.Distance(pt1, pt2); // d = Math.Sqrt(2)
//
// pt and multipoint
//
List<MapPoint> multiPts = [pt2, pt3];
Multipoint multiPoint = MultipointBuilderEx.CreateMultipoint(multiPts);
d = GeometryEngine.Instance.Distance(pt1, multiPoint); // d = Math.Sqrt(2)
//
// pt and envelope
//
Envelope env = EnvelopeBuilderEx.CreateEnvelope(pt1, pt2);
d = GeometryEngine.Instance.Distance(pt1, env); // d = 0
//
// pt and polyline
//
List<MapPoint> polylinePts = [MapPointBuilderEx.CreateMapPoint(2.0, 1.0), pt2];
polyline = PolylineBuilderEx.CreatePolyline(polylinePts);
d = GeometryEngine.Instance.Distance(pt1, polyline); // d = 1.0
//
// pt and polygon
//
Envelope env2 = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(3.0, 3.0), MapPointBuilderEx.CreateMapPoint(5.0, 5.0));
Polygon poly = PolygonBuilderEx.CreatePolygon(env2);
d = GeometryEngine.Instance.Distance(pt1, poly); // d = Math.Sqrt(8)
//
// envelope and polyline
//
d = GeometryEngine.Instance.Distance(env, polyline); // d = 0
//
// polyline and polyline
//
List<MapPoint> polylineList = [MapPointBuilderEx.CreateMapPoint(4, 3), MapPointBuilderEx.CreateMapPoint(4, 4)];
Polyline polyline2 = PolylineBuilderEx.CreatePolyline(polylineList);
d = GeometryEngine.Instance.Distance(polyline, polyline2); // d = Math.Sqrt(5)
//
// polygon and polygon
//
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env);
d = GeometryEngine.Instance.Distance(poly, poly2); // d = Math.Sqrt(2)// between points
MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1, 1, 1);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2, 2, 2);
MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(10, 2, 1);
// pt1 to pt2
double d = GeometryEngine.Instance.Distance3D(pt1, pt2); // d = Math.Sqrt(3)
// pt1 to pt3
d = GeometryEngine.Instance.Distance3D(pt1, pt3); // d = Math.Sqrt(82)
// pt2 to pt3
d = GeometryEngine.Instance.Distance3D(pt2, pt3); // d = Math.Sqrt(65)
// intersecting lines
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(3.0, 3.0, 1.0),
MapPointBuilderEx.CreateMapPoint(5.0, 1.0, 1.0),
];
Polyline line1 = PolylineBuilderEx.CreatePolyline(list);
List<MapPoint> list2 =
[
MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 1.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(5.0, 3.0, 1.0),
];
Polyline line2 = PolylineBuilderEx.CreatePolyline(list2);
bool intersects = GeometryEngine.Instance.Intersects(line1, line2); // intersects = true
d = GeometryEngine.Instance.Distance3D(line1, line2); // d = 0 (distance is 0 when geomtries intersect)Envelope env = EnvelopeBuilderEx.CreateEnvelope(100.0, 100.0, 500.0, 500.0);
// env.HasZ = false
Envelope result = GeometryEngine.Instance.Expand(env, 0.5, 0.5, true);
// result.Center = 300, 300
// result.XMin = 200
// result.YMin = 200
// result.XMax = 400
// result.YMax = 400
result = GeometryEngine.Instance.Expand(env, 100, 200, false);
// result.Center = 300, 300
// result.XMin = 0
// result.YMin = -100
// result.XMax = 600
// result.YMax = 700
try
{
// expand in 3 dimensions
result = GeometryEngine.Instance.Expand(env, 0.5, 0.5, 0.5, true);
}
catch (InvalidOperationException)
{
// the geometry is not Z-Aware
}
// expand a 3d envelope
MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(100, 100, 100);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(200, 200, 200);
env = EnvelopeBuilderEx.CreateEnvelope(pt1, pt2);
// env.HasZ = true
result = GeometryEngine.Instance.Expand(env, 0.5, 0.5, 0.5, true);
// result.Center = 150, 150, 150
// result.XMin = 125
// result.YMin = 125
// result.ZMin = 125
// result.XMax = 175
// result.YMax = 175
// result.ZMax = 175// build a polyline
polyline = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint(1, 1, 10, 20),
MapPointBuilderEx.CreateMapPoint(0, 0, 10, 20),
MapPointBuilderEx.CreateMapPoint(1, -1, 10, 20)
]);
// build the extender line
var extender = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint(2, 2),
MapPointBuilderEx.CreateMapPoint(2, -2),
]);
// extend
var result = GeometryEngine.Instance.Extend(polyline, extender, ExtendFlags.KeepEndAttributes);
Polyline extendedLine = result as Polyline;
// result.Parts[0].Points[0] = 2, 2, 10, 20
// result.parts[0].Points[1] = 1, 1, 10, 20
// result.Parts[0].Points[2] = 0, 0, 10, 20
// result.Parts[0].Points[3] = 1, -1, 10, 20
// result.Parts[0].Points[4] = 2, -2, 10, 20
// change the flags
result = GeometryEngine.Instance.Extend(polyline, extender, ExtendFlags.NoEndAttributes);
extendedLine = result as Polyline;
// result.Parts[0].Points[0] = 2, 2, 0
// result.parts[0].Points[1] = 1, 1, 10, 20
// result.Parts[0].Points[2] = 0, 0, 10, 20
// result.Parts[0].Points[3] = 1, -1, 10, 20
// result.Parts[0].Points[4] = 2, -2, 0
// extend
result = GeometryEngine.Instance.Extend(polyline, extender, ExtendFlags.KeepEndAttributes | ExtendFlags.NoExtendAtTo);
extendedLine = result as Polyline;
// result.Parts[0].Points[0] = 2, 2, 10, 20
// result.parts[0].Points[1] = 1, 1, 10, 20
// result.Parts[0].Points[2] = 0, 0, 10, 20
// result.Parts[0].Points[3] = 1, -1, 10, 20
// extend with no intersection
polyline = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint(1, 1),
MapPointBuilderEx.CreateMapPoint(3, 1)
]);
extender = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint(1, 4),
MapPointBuilderEx.CreateMapPoint(3, 4)
]);
result = GeometryEngine.Instance.Extend(polyline, extender, ExtendFlags.Default);
// result = null
result = GeometryEngine.Instance.Extend(polyline, extender, ExtendFlags.KeepEndAttributes | ExtendFlags.NoExtendAtTo);
// Use the result ...Polyline generalizedPolyline = GeometryEngine.Instance.Generalize(polylineWithZ, 200) as Polyline;
// generalizedPolyline.HasZ = true
Polygon generalized3DPolyline = GeometryEngine.Instance.Generalize3D(polylineWithZ, 200) as Polygon;
// generalized3DPolyline.HasZ = true
// note that generalized3DPolyline and generalizedPolyline will have different definitions
// i.e generalizedPolyline.IsEqual(generalized3DPolyline) = falsepolygon = PolygonBuilderEx.CreatePolygon(
[
MapPointBuilderEx.CreateMapPoint(-10018754.1713946, 10018754.1713946),
MapPointBuilderEx.CreateMapPoint(10018754.1713946, 10018754.1713946),
MapPointBuilderEx.CreateMapPoint(10018754.1713946, -10018754.1713946),
MapPointBuilderEx.CreateMapPoint(-10018754.1713946, -10018754.1713946)
], SpatialReferences.WebMercator);
var area = GeometryEngine.Instance.GeodesicArea(polygon);
// area is close to 255032810857732.31
area = GeometryEngine.Instance.GeodesicArea(polygon, AreaUnit.SquareKilometers);
// area is close to 255032810.85953,// buffer a point
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84);
Polygon outPolygon = GeometryEngine.Instance.GeodesicBuffer(pt, 5) as Polygon;
double delta = SpatialReferences.WGS84.XYTolerance * 2 * Math.Sqrt(2);
ReadOnlyPointCollection points = outPolygon.Points;
foreach (MapPoint p in points)
{
double d = GeometryEngine.Instance.GeodesicDistance(pt, p);
// d = 5 (+- delta)
}
// specify a unit for the distance
outPolygon = GeometryEngine.Instance.GeodesicBuffer(pt, 5000, LinearUnit.Millimeters) as Polygon;
// buffer of 0 distance produces an empty geometry
Geometry g = GeometryEngine.Instance.GeodesicBuffer(pt, 0);
// g.IsEmpty = true
// buffer many points
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(10.0, 20.0),
MapPointBuilderEx.CreateMapPoint(40.0, 40.0),
MapPointBuilderEx.CreateMapPoint(60.0, 60.0),
];
outPolygon = GeometryEngine.Instance.GeodesicBuffer(list, 10000) as Polygon;
// outPolygon.PartCount = 4
// buffer different geometry types
List<Coordinate2D> coords =
[
new Coordinate2D(1, 2), new Coordinate2D(10, 20), new Coordinate2D(20, 30),
new Coordinate2D(50, 60), new Coordinate2D(70, 80), new Coordinate2D(80, 40),
new Coordinate2D(90, 10), new Coordinate2D(110, 15), new Coordinate2D(120, 30),
new Coordinate2D(10, 40), new Coordinate2D(-10, 40), new Coordinate2D(-10, 50)
];
List<Geometry> manyGeometries =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84),
PolylineBuilderEx.CreatePolyline([coords[0], coords[1], coords[2]], SpatialReferences.WGS84),
PolylineBuilderEx.CreatePolyline([coords[3], coords[4], coords[5]]),
PolygonBuilderEx.CreatePolygon([coords[9], coords[10], coords[11]])
];
outPolygon = GeometryEngine.Instance.GeodesicBuffer(manyGeometries, 20000) as Polygon;
// specify unit types
outPolygon = GeometryEngine.Instance.GeodesicBuffer(manyGeometries, 20, LinearUnit.Miles) as Polygon;var point1 = MapPointBuilderEx.CreateMapPoint(-170, 45, SpatialReferences.WGS84);
var point2 = MapPointBuilderEx.CreateMapPoint(170, 45, SpatialReferences.WGS84);
var distances_meters = GeometryEngine.Instance.GeodesicDistance(point1, point2);
// distance is approximately 1572912.2066940258 in meters
var distance_feet = GeometryEngine.Instance.GeodesicDistance(point1, point2, LinearUnit.Feet);
// distance is approximately 5160473.11904786 in feetGeodesicEllipseParameter param = new()
{
AxisDirection = 4 * Math.PI / 3,
Center = new Coordinate2D(-120, 60),
LinearUnit = LinearUnit.Meters,
OutGeometryType = GeometryType.Polyline,
SemiAxis1Length = 6500000,
SemiAxis2Length = 1500000,
VertexCount = 800
};
Geometry geometry = GeometryEngine.Instance.GeodesicEllipse(param, SpatialReferences.WGS84);
// geometry.IsEmpty = false
polyline = geometry as Polyline;
// polyline.PointCount = 801
// polyline.PartCount = 1polyline = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint(-10018754.1713946, 10018754.1713946),
MapPointBuilderEx.CreateMapPoint(10018754.1713946, 10018754.1713946)
], SpatialReferences.WebMercator);
var length = GeometryEngine.Instance.GeodesicLength(polyline);
// length is approx 5243784.5551844323 in meters
length = GeometryEngine.Instance.GeodesicLength(polyline, LinearUnit.Miles);
// length is approx 3258.33666089067 in miles
var polyline2 = GeometryEngine.Instance.Project(polyline, SpatialReferences.WGS84);
length = GeometryEngine.Instance.GeodesicLength(polyline2);
// length is approx 5243784.55518443 in meters after projectingGeodesicSectorParameter param = new()
{
ArcVertexCount = 50,
AxisDirection = Math.PI / 4,
Center = new Coordinate2D(0, 0),
LinearUnit = LinearUnit.Meters,
OutGeometryType = GeometryType.Polygon,
RadiusVertexCount = 10,
SectorAngle = 5 * Math.PI / 3,
SemiAxis1Length = 100000,
SemiAxis2Length = 20000,
StartDirection = 11 * Math.PI / 6
};
Geometry geometry = GeometryEngine.Instance.GeodesicSector(param, SpatialReferences.WGS84);
// geometry.IsEmpty = false
polygon = geometry as Polygon;
// polygon.PointCount = 68
// polygon.PartCount = 1List<Coordinate2D> coords =
[
new Coordinate2D(-80, 0),
new Coordinate2D(-20, 60),
new Coordinate2D(40, 20),
new Coordinate2D(0, -20),
new Coordinate2D(-80, 0)
];
SpatialReference sr = SpatialReferences.WGS84;
// create a polyline
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
// densify in km
Polyline geodesicPolyline = GeometryEngine.Instance.GeodeticDensifyByDeviation(polyline, 200, LinearUnit.Kilometers, GeodeticCurveType.Geodesic) as Polyline;
// densify in m
geodesicPolyline = GeometryEngine.Instance.GeodeticDensifyByDeviation(polyline, 200, LinearUnit.Meters, GeodeticCurveType.Geodesic) as Polyline;
// Change curve type to Loxodrome
Polyline loxodromePolyline = GeometryEngine.Instance.GeodeticDensifyByDeviation(polyline, 200, LinearUnit.Meters, GeodeticCurveType.Loxodrome) as Polyline;List<Coordinate2D> coords =
[
new Coordinate2D(-80, 0),
new Coordinate2D(-20, 60),
new Coordinate2D(40, 20),
new Coordinate2D(0, -20),
new Coordinate2D(-80, 0)
];
SpatialReference sr = SpatialReferences.WGS84;
// create a polygon
polygon = PolygonBuilderEx.CreatePolygon(coords, sr);
// get the geodesic lengths of the polygon segments
ReadOnlySegmentCollection segments = polygon.Parts[0];
List<double> geoLengths = new(segments.Count);
foreach (Segment s in segments)
{
Polyline line = PolylineBuilderEx.CreatePolyline(s, sr);
double geoLen = GeometryEngine.Instance.GeodesicLength(line);
geoLengths.Add(geoLen);
}
// find the max length
geoLengths.Sort();
double maxLen = geoLengths[^1];
// densify the polygon (in meters)
Polygon densifiedPoly = GeometryEngine.Instance.GeodeticDensifyByLength(polygon, maxLen, LinearUnit.Meters, GeodeticCurveType.Geodesic) as Polygon;
// densify the polygon (in km)
double maxSegmentLength = maxLen / 10000;
densifiedPoly = GeometryEngine.Instance.GeodeticDensifyByLength(polygon, maxSegmentLength, LinearUnit.Kilometers, GeodeticCurveType.Geodesic) as Polygon;SpatialReference sr = SpatialReferences.WGS84;
MapPoint p1 = MapPointBuilderEx.CreateMapPoint(111, 55, sr);
MapPoint p2 = MapPointBuilderEx.CreateMapPoint(95.5845, 64.2285, sr);
double distance;
distance = GeometryEngine.Instance.GeodeticDistanceAndAzimuth(p1, p2, GeodeticCurveType.Geodesic, out double az12, out double az21);
// distance - 1339728.0303777338
// az12 - 326.235780421405
// az21 - 132.87425637913955
distance = GeometryEngine.Instance.GeodeticDistanceAndAzimuth(p1, p2, GeodeticCurveType.Loxodrome, out az12, out az21);
// distance - 1342745.9687172563
// az12 - 319.966400332104
// az21- 139.96640033210397
distance = GeometryEngine.Instance.GeodeticDistanceAndAzimuth(p1, p2, GeodeticCurveType.GreatElliptic, out az12, out az21);
// distance - 1339728.038837946
// az12 - 326.22479262335418
// az21 - 132.88558894347742
MapPoint p3 = MapPointBuilderEx.CreateMapPoint(0, 0, sr);
MapPoint p4 = MapPointBuilderEx.CreateMapPoint(1, 0, sr);
distance = GeometryEngine.Instance.GeodeticDistanceAndAzimuth(p3, p4, GeodeticCurveType.Geodesic, out az12, out az21);
// distance - 111319.49079327342
// az12 - 90
// az21 - 270
distance = GeometryEngine.Instance.GeodeticDistanceAndAzimuth(p3, p4, GeodeticCurveType.Geodesic, LinearUnit.Miles, out az12, out az21);
// distance - 69.1707247134693
// az12 - 90
// az21 - 270SpatialReference sr = SpatialReferences.WebMercator;
var points = new[] { MapPointBuilderEx.CreateMapPoint(0, 0, sr) };
double distance = 10;
double azimuth = Math.PI / 2;
var resultPoints = GeometryEngine.Instance.GeodeticMove(points, sr, distance, LinearUnit.Meters, azimuth, GeodeticCurveType.Geodesic);
// resultPoints.First().X = 10
// resultPoints.First().Y = 0
// resultPoints.First().SpatialReference.Wkid = sr.Wkid
// Change LinearUnit to Miles
resultPoints = GeometryEngine.Instance.GeodeticMove(points, sr, distance, LinearUnit.Miles, azimuth, GeodeticCurveType.Geodesic);
// resultPoints.First().X = 16093.44
// resultPoints.First().Y = 0
// Change curve type
resultPoints = GeometryEngine.Instance.GeodeticMove(points, sr, distance, LinearUnit.Miles, azimuth, GeodeticCurveType.Loxodrome);
// resultPoints.First().X = 16093.44
// resultPoints.First().Y = 0// get all the geographic coordinate systems
IReadOnlyList<CoordinateSystemListEntry> gcs_list = GeometryEngine.Instance.GetPredefinedCoordinateSystemList(CoordinateSystemFilter.GeographicCoordinateSystem);
// get the projected coordinate systems
IReadOnlyList<CoordinateSystemListEntry> proj_list = GeometryEngine.Instance.GetPredefinedCoordinateSystemList(CoordinateSystemFilter.ProjectedCoordinateSystem);
// get the vertical coordinate systems
IReadOnlyList<CoordinateSystemListEntry> vert_list = GeometryEngine.Instance.GetPredefinedCoordinateSystemList(CoordinateSystemFilter.VerticalCoordinateSystem);
// get geographic and projected coordinate systems
IReadOnlyList<CoordinateSystemListEntry> combined_list = GeometryEngine.Instance.GetPredefinedCoordinateSystemList(CoordinateSystemFilter.GeographicCoordinateSystem | CoordinateSystemFilter.ProjectedCoordinateSystem);
// investigate one of the entries
CoordinateSystemListEntry entry = gcs_list[0];
int wkid = entry.Wkid;
string category = entry.Category;
string name = entry.Name;// a geographic transformation is the definition of how to project from one spatial reference to another
IReadOnlyList<GeographicTransformationListEntry> list = GeometryEngine.Instance.GetPredefinedGeographicTransformationList();
// a GeographicTransformationListEntry consists of Name, Wkid, the From SpatialReference Wkid, the To SpatialReference Wkid
GeographicTransformationListEntry entry = list[0];
int fromWkid = entry.FromSRWkid;
int toWkid = entry.ToSRWkid;
int wkid = entry.Wkid;
string name = entry.Name;SpatialReference sr = SpatialReferences.WGS84;
List<Coordinate2D> coords =
[
new Coordinate2D(-111, 72),
new Coordinate2D(-108, 68),
new Coordinate2D(-114, 68)
];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
Polyline subCurve = GeometryEngine.Instance.GetSubCurve(polyline, 0, 5, AsRatioOrLength.AsLength);
// subCurve.PartCount = 1
// subCurve.PointCount = 2
ReadOnlyPointCollection points = subCurve.Points;
// points[0] = -111, 72
// points[1] = -108, 68
subCurve = GeometryEngine.Instance.GetSubCurve(polyline, 0, 0.5, AsRatioOrLength.AsRatio);
// subCurve.PointCount = 3
points = subCurve.Points;
// points[0] = -111, 72
// points[1] = -108, 68
// points[2] = -108.5, 68
List<Coordinate3D> coords3D =
[
new Coordinate3D(0, 0, 0),
new Coordinate3D(0, 1, 1),
new Coordinate3D(1, 1, 2),
new Coordinate3D(1, 0, 3)
];
polygon = PolygonBuilderEx.CreatePolygon(coords3D, sr);
subCurve = GeometryEngine.Instance.GetSubCurve3D(polygon, 0, 1, AsRatioOrLength.AsLength);
// subCurve.HasZ = true
points = subCurve.Points;
// points.Count = 2
// points[0] = 0, 0, 0
// points[1] = 0, 0.70710678118654746, 0.70710678118654746// mitered join and butt caps
SpatialReference sr = SpatialReferenceBuilder.CreateSpatialReference(102010);
List<Coordinate2D> coords =
[
new Coordinate2D(1400,6200),
new Coordinate2D(1600,6300),
new Coordinate2D(1800,6200)
];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
polygon = GeometryEngine.Instance.GraphicBuffer(polyline, 50, LineJoinType.Miter, LineCapType.Butt, 10, 0, -1) as Polygon;
// bevelled join and round caps
Envelope envelope = EnvelopeBuilderEx.CreateEnvelope(0, 0, 10000, 10000, SpatialReferences.WebMercator);
Polygon outPolygon = GeometryEngine.Instance.GraphicBuffer(envelope, 1000, LineJoinType.Bevel, LineCapType.Round, 4, 0, 96) as Polygon;// round join and round caps
MapPoint point1 = MapPointBuilderEx.CreateMapPoint(0, 0);
MapPoint point2 = MapPointBuilderEx.CreateMapPoint(1, 1, SpatialReferences.WGS84);
MapPoint point3 = MapPointBuilderEx.CreateMapPoint(1000000, 1200000, SpatialReferences.WebMercator);
List<MapPoint> points = [point1, point2, point3];
IReadOnlyList<Geometry> geometries = GeometryEngine.Instance.GraphicBuffer(points, 5, LineJoinType.Round, LineCapType.Round, 0, 0, 3000);// determine intersection between two polylines
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(5.0, 1.0),
];
Polyline line1 = PolylineBuilderEx.CreatePolyline(pts);
List<MapPoint> pts2 =
[
MapPointBuilderEx.CreateMapPoint(1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0),
MapPointBuilderEx.CreateMapPoint(5.0, 3.0),
];
Polyline line2 = PolylineBuilderEx.CreatePolyline(pts2);
bool intersects = GeometryEngine.Instance.Intersects(line1, line2); // intersects = true
Geometry g = GeometryEngine.Instance.Intersection(line1, line2, GeometryDimensionType.EsriGeometry0Dimension);
Multipoint resultMultipoint = g as Multipoint;
// result is a multiPoint that intersects at (2,2) and (4,2)// determine intersection between two polygons
Envelope env1 = EnvelopeBuilderEx.CreateEnvelope(new Coordinate2D(3.0, 2.0), new Coordinate2D(6.0, 6.0));
Polygon poly1 = PolygonBuilderEx.CreatePolygon(env1);
Envelope env2 = EnvelopeBuilderEx.CreateEnvelope(new Coordinate2D(1.0, 1.0), new Coordinate2D(4.0, 4.0));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env2);
Polygon polyResult = GeometryEngine.Instance.Intersection(poly1, poly2) as Polygon;// create a polygon
List<Coordinate2D> list2D =
[
new Coordinate2D(1.0, 1.0),
new Coordinate2D(1.0, 2.0),
new Coordinate2D(2.0, 2.0),
new Coordinate2D(2.0, 1.0),
];
polygon = PolygonBuilderEx.CreatePolygon(list2D);
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polygon);
MapPoint pt = GeometryEngine.Instance.LabelPoint(polygon);MapPoint c1 = MapPointBuilderEx.CreateMapPoint(1, 2, 3);
MapPoint c2 = MapPointBuilderEx.CreateMapPoint(4, 2, 4);
// line segment
LineSegment line = LineBuilderEx.CreateLineSegment(c1, c2);
double len = line.Length; // = 3
double len3D = line.Length3D; // = Math.Sqrt(10)
// polyline
Polyline p = PolylineBuilderEx.CreatePolyline(line);
double p_len = p.Length; // = len = 3
double p_len3D = p.Length3D; // = len3D = Math.Sqrt(10)
double ge_len = GeometryEngine.Instance.Length(p); // = p_len = len = 3
double ge_len3d = GeometryEngine.Instance.Length3D(p); // = p_len3D = len3D = Math.Sqrt(10)string json = "{\"hasM\":true,\"rings\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,20],[0,-2000,0],[1000,-2000,-20],[2000,-2000,-30],[3000,-2000,10],[4000,-2000,5]]],\"spatialReference\":{\"wkid\":3857}}";
polygon = PolygonBuilderEx.FromJson(json);
GeometryEngine.Instance.GetMinMaxM(polygon, out double minM, out double maxM);
// minM = -30
// maxM = 20
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,null],[-1000,-2000,null]]]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.GetMinMaxM(polyline, out minM, out maxM);
// minM = 10
// maxM = 10
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,null],[-2000,-2000,null],[-1000,-2000,null]]]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.GetMinMaxM(polyline, out minM, out maxM);
// minM = double.Nan
// maxM = double.Nanstring json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,20]]]}";
polyline = PolylineBuilderEx.FromJson(json);
MonotonicType monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.Ascending
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,5],[-1000,-2000,0]]]}";
polyline = PolylineBuilderEx.FromJson(json);
monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.Descending
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,0]]]}";
polyline = PolylineBuilderEx.FromJson(json);
monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.NotMonotonicGet a multipoint corresponding to the locations where the specified M values occur along the geometry - GetPointsAtM
string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,20],[0,-2000,0],[1000,-2000,20],[2000,-2000,30],[3000,-2000,10],[4000,-2000,5]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
Multipoint multipoint = GeometryEngine.Instance.GetPointsAtM(polyline, 10, 500);
// multiPoint.PointCount = 4
// multipoint.Points[0] X= -3000, Y= -2500 M= 10
// multipoint.Points[1] X= -500, Y= -2500 M= 10
// multipoint.Points[2] X= 500, Y= -2500 M= 10
// multipoint.Points[3] X= 3000, Y= -2500 M= 10string json = "{\"hasM\":true,\"paths\":[[[-2000,0,1],[-1000,1000,2],[-1000,0,3],[1000,1000,4],[2000,1000,5],[2000,2000,6],[3000,2000,7],[4000,0,8]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline subCurve = GeometryEngine.Instance.GetSubCurveBetweenMs(polyline, 2, 6);
// subCurve.PointCount = 5
// subCurve.Points[0] X= --1000, Y= 1000 M= 2
// subCurve.Points[1] X= --1000, Y= 0 M= 3
// subCurve.Points[2] X= 1000, Y= 1000 M= 4
// subCurve.Points[3] X= 2000, Y= -1000 M= 5
// subCurve.Points[4] X= 2000, Y= -2000 M= 6
subCurve = GeometryEngine.Instance.GetSubCurveBetweenMs(polyline, double.NaN, 5);
// subCurve.PointCount = 0
// subCurve.IsEmpty = trueGet line segments corresponding to the normal at the locations where the specified M values occur along the geometry - GetNormalsAtM
IList<MapPoint> inPoints =
[
MapPointBuilderEx.CreateMapPoint(-3000, -2000, 0, 100),
MapPointBuilderEx.CreateMapPoint(-3000, 0, 0, 200),
MapPointBuilderEx.CreateMapPoint(-1000, 0, 0, 300),
MapPointBuilderEx.CreateMapPoint(-1000, 2000, 0, 100),
MapPointBuilderEx.CreateMapPoint(3000, 2000, 0, 200),
MapPointBuilderEx.CreateMapPoint(3000, 0, 0, 300),
MapPointBuilderEx.CreateMapPoint(1000, 0, 0, 100),
MapPointBuilderEx.CreateMapPoint(1000, -2000, 0, 200),
MapPointBuilderEx.CreateMapPoint(-3000, -2000, 0, 300)
];
polygon = PolygonBuilderEx.CreatePolygon(inPoints);
// polygon.HasM = true
polyline = GeometryEngine.Instance.GetNormalsAtM(polygon, 150, 100);
// polyline.PartCount = 5
// polyline.PointCount = 10
// polyline.HasM = false
ReadOnlyPartCollection parts = polyline.Parts;
ReadOnlySegmentCollection segments = parts[0];
LineSegment line = segments[0] as LineSegment;
// line.StartCoordinate = (-3000, -1000)
// line.EndCoordinate = (-2900, -1000)
segments = parts[1];
line = segments[0] as LineSegment;
// line.StartCoordinate = (-1000, 1500)
// line.EndCoordinate = (-900, 1500)
segments = parts[2];
line = segments[0] as LineSegment;
// line.StartCoordinate = (1000, 2000)
// line.EndCoordinate = (1000, 1900)
segments = parts[3];
line = segments[0] as LineSegment;
// line.StartCoordinate = (1500, 0)
// line.EndCoordinate = (1500, 100)
segments = parts[4];
line = segments[0] as LineSegment;
// line.StartCoordinate = (1000, -1000)
// line.EndCoordinate = (900, -1000)string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,-3],[-2000,-2000,-2]],[[-2000,-2000,1],[-2000,1000,2]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
// polyline has 2 parts
GeometryEngine.Instance.GetMsAtDistance(polyline, 0, AsRatioOrLength.AsLength, out double m1, out double m2);
// m1 = -3
// m2 = NaN
GeometryEngine.Instance.GetMsAtDistance(polyline, 500, AsRatioOrLength.AsLength, out m1, out m2);
// m1 = -2.5
// m2 = NaN
GeometryEngine.Instance.GetMsAtDistance(polyline, 1000, AsRatioOrLength.AsLength, out m1, out m2);
// m1 = -2
// m2 = 1 // m2 has a value because distance 1000 is at the end of the first part, beginning of the second partstring json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,-3],[-2000,-2000,-2],[-1000,-2000,null]]]}";
polyline = PolylineBuilderEx.FromJson(json);
// A point already exists at the given distance
double m = -1;
double distance = 2000;
bool createNewPart = false;
Polyline outputPolyline = GeometryEngine.Instance.InsertMAtDistance(polyline, m, distance, AsRatioOrLength.AsLength, createNewPart, out bool splitHappened, out int partIndex, out int segmentIndex) as Polyline;
// splitHappened = false, partIndex = 0, segmentIndex = 2
// outputPolyline.Points[2].M = -1
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,-3],[-2000,-2000,-2],[-1000,-2000,-1]],[[0,0,0],[0,1000,0],[0,2000,2]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
// A point already exists at the given distance, but createNewPart = true
m = 1;
distance = 3000;
createNewPart = true;
outputPolyline = GeometryEngine.Instance.InsertMAtDistance(polyline, m, distance, AsRatioOrLength.AsLength, createNewPart, out splitHappened, out partIndex, out segmentIndex) as Polyline;
string outputJson = outputPolyline.ToJson();
// splitHappened = true, partIndex = 2, segmentIndex = 0
// outputJson = {"hasM":true,"paths":[[[-3000,-2000,-3],[-2000,-2000,-2],[-1000,-2000,-1]],[[0,0,0],[0,1000,1]],[[0,1000,1],[0,2000,2]]]}}
// A new part has been created and the M values for outputPolyline.Points[4] and outputPolyline.Points[5] have been modified
// A point does not exist at the given distance
m = 1;
distance = 3500;
createNewPart = false;
outputPolyline = GeometryEngine.Instance.InsertMAtDistance(polyline, m, distance, AsRatioOrLength.AsLength, createNewPart, out splitHappened, out partIndex, out segmentIndex) as Polyline;
outputJson = outputPolyline.ToJson();
// splitHappened = true even though createNewPart = false because a new point was created
// partIndex = 1, segmentIndex = 2
// outputJson = {"hasM":true,"paths":[[[-3000,-2000,-3],[-2000,-2000,-2],[-1000,-2000,-1]],[[0,0,0],[0,1000,0],[0,1500,1],[0,2000,2]]]}
// A new point has been inserted (0, 1500, 1) by interpolating the X and Y coordinates and M value set to the input M value.string json = "{\"hasM\":true,\"paths\":[[[0,0,-1],[1,0,0],[1,1,1],[1,2,2],[3,1,3],[5,3,4],[9,5,5],[7,6,6]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
// Interpolate using points (0, 0, 17), (1, 0, 42), (7, 6, 18)
List<MapPoint> updatePoints = new(3);
MapPointBuilderEx builder = new(0, 0)
{
M = 17
};
updatePoints.Add(builder.ToGeometry() as MapPoint);
builder.X = 1;
builder.M = 42;
updatePoints.Add(builder.ToGeometry() as MapPoint);
builder.X = 7;
builder.Y = 6;
builder.M = 18;
updatePoints.Add(builder.ToGeometry() as MapPoint);
// Calibrate all the points in the polyline
double cutOffDistance = polyline.Length;
Polyline updatedPolyline = GeometryEngine.Instance.CalibrateByMs(polyline, updatePoints, UpdateMMethod.Interpolate, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0, 0, 17 ), ( 1, 0, 42 ), ( 1, 1, 38 ), ( 1, 2, 34 ), ( 3, 1, 30 ), ( 5, 3, 26 ), ( 9, 5, 22 ), ( 7, 6, 18 )
// ExtrapolateBefore using points (1, 2, 42), (9, 5, 18)
builder.X = 1;
builder.Y = 2;
builder.M = 42;
updatePoints[0] = builder.ToGeometry() as MapPoint;
builder.X = 9;
builder.Y = 5;
builder.M = 18;
updatePoints[1] = builder.ToGeometry() as MapPoint;
updatePoints.RemoveAt(2);
updatedPolyline = GeometryEngine.Instance.CalibrateByMs(polyline, updatePoints, UpdateMMethod.ExtrapolateBefore, cutOffDistance) as Polyline;
// The points in the updated polyline are
// ( 0, 0, 66 ), ( 1, 0, 58 ), ( 1, 1, 50 ), ( 1, 2, 42 ), ( 3, 1, 3 ), ( 5, 3, 4 ), ( 9, 5, 18 ), ( 7, 6, 6 )
// ExtrapolateAfter using points (0, 0, 17), (1, 2, 42)
builder.X = 0;
builder.Y = 0;
builder.M = 17;
updatePoints.Insert(0, builder.ToGeometry() as MapPoint);
updatePoints.RemoveAt(2);
updatedPolyline = GeometryEngine.Instance.CalibrateByMs(polyline, updatePoints, UpdateMMethod.ExtrapolateAfter, cutOffDistance) as Polyline;
// The points in the updated polyline are
// ( 0, 0, 17 ), ( 1, 0, 0 ), ( 1, 1, 1 ), ( 1, 2, 42 ), ( 3, 1, 50.333333333333333 ), ( 5, 3, 58.666666666666671 ), ( 9, 5, 67 ), ( 7, 6, 75.333333333333343 )
// ExtrapolateAfter and Interpolate using points (0, 0, 17), (1, 2, 42)
updatedPolyline = GeometryEngine.Instance.CalibrateByMs(polyline, updatePoints, UpdateMMethod.ExtrapolateAfter | UpdateMMethod.Interpolate, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0,0,17),(1,0,25.333333333333336),(1,1,33.666666666666671),(1,2,42),(3,1,50.333333333333336),(5,3,58.666666666666671),(9,5,67),(7,6,75.333333333333343)List<MapPoint> points = [];
MapPointBuilderEx pointBuilder = new(0, 0)
{
HasM = true,
M = 0
};
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 8);
pointBuilder.M = 12;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 18);
pointBuilder.M = 10;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 28);
pointBuilder.M = 14;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 32);
pointBuilder.M = 20;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 38);
pointBuilder.M = 26;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 50);
pointBuilder.M = 30;
points.Add(pointBuilder.ToGeometry());
polyline = PolylineBuilderEx.CreatePolyline(points, AttributeFlags.HasM);
// The points in the polyline are (0, 0, 0), (0, 8, 12), (0, 18, 10), (0, 28, 14), (0, 32, 20), (0, 38, 26), (0, 50, 30)
// Calibrate Ms using points (0, 8, 15), (0, 28, 30), (0, 38, 20)
points.Clear();
pointBuilder.SetValues(0, 8);
pointBuilder.M = 15;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 28);
pointBuilder.M = 30;
points.Add(pointBuilder.ToGeometry());
pointBuilder.SetValues(0, 38);
pointBuilder.M = 20;
points.Add(pointBuilder.ToGeometry());
double cutOffDistance = polyline.Length;
// ExtrapolateBefore
Polyline updatedPolyline = GeometryEngine.Instance.CalibrateMsByDistance(polyline, points, UpdateMMethod.ExtrapolateBefore, true, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0, 0, 9), (0, 8, 15), (0, 18, 10), (0, 28, 30), (0, 32, 20), (0, 38, 20), (0, 50, 30)
// Interpolate
updatedPolyline = GeometryEngine.Instance.CalibrateMsByDistance(polyline, points, UpdateMMethod.Interpolate, true, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0, 0, 0), (0, 8, 15), (0, 18, 22.5), (0, 28, 30), (0, 32, 26), (0, 38, 20), (0, 50, 30)
// ExtrapolateAfter
updatedPolyline = GeometryEngine.Instance.CalibrateMsByDistance(polyline, points, UpdateMMethod.ExtrapolateAfter, true, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0, 0, 0), (0, 8, 15), (0, 18, 10), (0, 28, 30), (0, 32, 20), (0, 38, 20), (0, 50, 8)
// ExtrapolateBefore and Interpolate and ExtrapolateAfter
updatedPolyline = GeometryEngine.Instance.CalibrateMsByDistance(polyline, points, UpdateMMethod.ExtrapolateAfter, true, cutOffDistance) as Polyline;
// The points in the updated polyline are
// (0, 0, 9), (0, 8, 15), (0, 18, 22.5), (0, 28, 30), (0, 32, 26), (0, 38, 20), (0, 50, 8)string json = "{\"hasM\":true,\"paths\":[[[-4,2,1],[-4,5,2],[-2,5,3],[-2,7,4],[2,7,5]],[[4,1,-1],[2,1,-2],[2,-2,-3],[-3,-2,-4],[-3,0,-5]]]}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.DropMs(polyline) as Polyline;
// outputPolyline.HasM = true. Every M-value is NaN.
// outputPolyline.ToJson() = {"hasM":true,"paths":[[[-4,2,null],[-4,5,null],[-2,5,null],[-2,7,null],[2,7,null]],[[4,1,-null],[2,1,null],[2,-2,null],[-3,-2,null],[-3,0,null]]]}string json = "{\"hasM\":true,\"paths\":[[[2,0,50],[2,1,40],[3,1,30],[3,5,60],[7,5,12],[7,1,20],[9,1,28],[9,3,10]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
// Extrapolate M-values from part 0, point 3 to part 0, point 5
Polyline outPolyline = GeometryEngine.Instance.ExtrapolateMs(polyline, ExtrapolateMMethod.ExtrapolateBefore, 0, 3, 0, 5) as Polyline;
// The points in outPolyline are (x, y, m):
// ( 2, 0, 90 ), ( 2, 1, 85 ), ( 3, 1, 80 ), ( 3, 5, 60 ), ( 7, 5, 12 ), ( 7, 1, 20 ), ( 9, 1, 28 ), ( 9, 3, 10 )
json = "{\"hasM\":true,\"paths\":[[[2,0,50],[2,1,40],[3,1,30],[3,5,60],[7,5,12],[7,1,20],[9,1,28],[9,3,10]],[[5,-4,-10],[5,-2,-40],[10,-2,-60],[10,-6,-50],[8,-6,-40],[8,-4,-80],[6,-4,-90]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
// Extrapolate M-values from part 0, point 5 to part1, point 1
outPolyline = GeometryEngine.Instance.ExtrapolateMs(polyline, ExtrapolateMMethod.ExtrapolateAfter, 0, 5, 1, 1) as Polyline;
// The points in part 0 of outPolyline don't change. They are (x, y, m):
// ( 2, 0, 50 ), ( 2, 1, 40 ), ( 3, 1, 30 ), ( 3, 5, 60 ), ( 7, 5, 12 ), ( 7, 1, 20 ), ( 9, 1, 28 ), ( 9, 3, 10 )
// The points in part 1 of outPolyline are (x, y, m):
// ( 5, -4, -10 ), ( 5, -2, -40 ), ( 10, -2, -90 ), ( 10, -6, -130 ), ( 8, -6, -150 ), ( 8, -4, -170 ), ( 6, -4, -190 )string json = "{\"hasM\":true,\"paths\":[[[-4,1,1],[-4,3,2],[-2,3,3],[-2,5,1]],[[3,5,1],[3,2,2],[6,2,3],[6,-2,2]]]}";
polyline = PolylineBuilderEx.FromJson(json);
// Get the distances as length measured from the start of the multipart
IReadOnlyList<double> distances = GeometryEngine.Instance.GetDistancesAtM(polyline, AsRatioOrLength.AsLength, 2);
// distances.Count = 4
// distances[0] = 2 measured to the point (-4, 3, 2)
// distances[1] = 5 measured to the point (-2, 4, 2). Its M-value is interpolated from the segment (-2, 3, 3) -> (-2, 5, 1)
// distances[2] = 9 measured to the point (3, 2, 2)
// distances[3] = 16 measured to the point (6, -2, 2)
// Get the distances as a ratio of the distance measured from the start of the multipart and the total length of the multipart
distances = GeometryEngine.Instance.GetDistancesAtM(polyline, AsRatioOrLength.AsRatio, 2);
// distances.Count = 4;
// distances are { 0.125, 0.3125, 0.5625, 1 }Get a polyline and other details corresponding to the subcurves between the specified M-values GetSubCurveBetweenMsEx
string json = "{\"hasM\":true,\"paths\":[[[-2000,0,1],[-1000,1000,-1],[-1000,0,3],[1000,1000,4],[2000,1000,5],[2000,2000,6],[3000,2000,7],[4000,0,8]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
// Get the subcurve between M-values 2 and 6
Polyline subCurve = GeometryEngine.Instance.GetSubCurveBetweenMsEx(polyline, 2, 6, out MSubCurveRelation fromDetail, out MSubCurveRelation toDetail);
// The subcurve has one part and five points. The subcurve points are (x, y, m):
// (-1000, 250, 2), (-1000, 0, 3), (1000, 1000, 4), (2000, 1000, 5), (2000, 2000, 6)
// fromDetail = toDetail = MSubCurveRelation.MBetweenMinMax
// Get the subcurve between M-values -2 and 3.5
subCurve = GeometryEngine.Instance.GetSubCurveBetweenMsEx(polyline, -2, 3.5, out fromDetail, out toDetail);
// The subcurve has two parts and five points.
// The subcurve points in part 0 are (x, y, m): (-1000, 1000, -1), (-2000, 0, 1)
// The subcurve points in part 1 are (x, y, m): (-1000, 1000, -1), (-1000, 0, 3), (0, 500, 3.5)
// fromDetail = MSubCurveRelation.MBelowMin, toDetail = MSubCurveRelation.MBetweenMinMaxGet a combination of monotonicity values that describes all trends in the M-values over the length of the multipart - GetMMonotonicity
string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,5],[-1000,-2000,0]]]}";
polyline = PolylineBuilderEx.FromJson(json);
Monotonicity monotonicity = GeometryEngine.Instance.GetMMonotonicity(polyline);
// monotonicity = Monotonicity.ValueDecreases
// Create a polygon from the polyline
polygon = PolygonBuilderEx.CreatePolygon(polyline);
monotonicity = GeometryEngine.Instance.GetMMonotonicity(polygon);
// monotonicity = ValueIncreases | ValueDecreases
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,10],[-1000,-2000,10]]]}";
polyline = PolylineBuilderEx.FromJson(json);
monotonicity = GeometryEngine.Instance.GetMMonotonicity(polygon);
// monotonicity = Monotonicity.ValueLevel
json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,null],[-2000,-2000,5],[-1000,-2000,10]]]}";
polyline = PolylineBuilderEx.FromJson(json);
monotonicity = GeometryEngine.Instance.GetMMonotonicity(polyline);
// monotonicity = ValueIncreases | ValueEmpty
// Create an empty polyline
Polyline emptyPolyline = PolylineBuilderEx.FromJson("{\"hasM\":true,\"paths\":[]}");
monotonicity = GeometryEngine.Instance.GetMMonotonicity(emptyPolyline);
// monotonicity = Monotonicity.Nonestring json = "{\"hasM\":true,\"paths\":[[[0,0,-1],[1,0,0],[1,1,1],[1,2,2],[3,1,3],[5,3,4],[9,5,5],[7,6,6]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
// Interpolate between points 2 and 6
Polyline outPolyline = GeometryEngine.Instance.InterpolateMsBetween(polyline, 0, 2, 0, 6) as Polyline;
// The points of the output polyline are
// (0, 0, -1), (1, 0, 0), (1, 1, 1), (1, 2, 1.3796279833912741), (3, 1, 2.2285019604153242), (5, 3, 3.3022520459518998), (9, 5, 5), (7, 6, 6)Coordinate2D[] coords = [new Coordinate2D(-2, 2), new Coordinate2D(3, 5), new Coordinate2D(7, 2)];
polyline = PolylineBuilderEx.CreatePolyline(coords); // polyline.HasM = false
bool isMSimple = GeometryEngine.Instance.IsMSimple(polyline); // isMSimple = false
PolylineBuilderEx polylineBuilder = new(polyline)
{
HasM = true
};
polyline = polylineBuilder.ToGeometry();
isMSimple = GeometryEngine.Instance.IsMSimple(polyline); // isMSimple = false
MapPoint point1 = MapPointBuilderEx.CreateMapPoint(-2, 2, -1, 1);
MapPoint point2 = MapPointBuilderEx.CreateMapPoint(3, 5, -2, 2);
MapPoint[] points = [point1, point2];
polyline = PolylineBuilderEx.CreatePolyline(points, AttributeFlags.HasM);
isMSimple = GeometryEngine.Instance.IsMSimple(polyline); // isMSimple = true// Create a multipoint and multiply M-values by 6
Coordinate2D[] coords = [ new Coordinate2D(-4, 4), new Coordinate2D(-1, 1), new Coordinate2D(2, 6),
new Coordinate2D(-8, 2), new Coordinate2D(5, -3), new Coordinate2D(7, 2), new Coordinate2D(5, 3), new Coordinate2D(3, -1) ];
double[] ms = [1, 2, 3, 4, 5, 6, 7, 8];
MultipointBuilderEx builder = new(coords)
{
Ms = ms,
HasM = true
};
Multipoint multipoint = builder.ToGeometry();
Multipoint outMultipoint = GeometryEngine.Instance.MultiplyMs(multipoint, 6) as Multipoint;
// The xy-values of the points in outMultipoint are the same as the points in the input multipoint.
// The M-values in outMultipoint are { 6, 12, 18, 24, 30, 36, 42, 48 }// Create a polyline and add an offset of 2 to each of the M-values
MapPointBuilderEx pointBuilder = new(0, 0)
{
M = 1
};
MapPoint point1 = pointBuilder.ToGeometry();
pointBuilder.SetValues(2, 2);
pointBuilder.M = 3;
MapPoint point2 = pointBuilder.ToGeometry();
polyline = PolylineBuilderEx.CreatePolyline([point1, point2], AttributeFlags.HasM); ;
Polyline outPolyline = GeometryEngine.Instance.OffsetMs(polyline, 2) as Polyline;
// The xy-values of the points in outPolyline are the same as the points in the input polyline.
// The M-values in outPolyline are { 3, 5 }
// Create an envelope and add an offset of 25 to each of the M-values
EnvelopeBuilderEx envelopeBuilder = new(-5, 1, 2, 4)
{
MMin = 10,
MMax = 20
};
Envelope envelope = envelopeBuilder.ToGeometry();
Envelope outEnvelope = GeometryEngine.Instance.OffsetMs(envelope, 25) as Envelope;
// The xy-values of the points in outEnvelope are the same as the points in the input envelope.
// outEnvelope.MMin = 35, outEnvelope.MMax = 45
// Add a negative offset to the M-values of the envelope
outEnvelope = GeometryEngine.Instance.OffsetMs(envelope, -10) as Envelope;
// The xy-values of the points in outEnvelope are the same as the points in the input envelope.
// outEnvelope.MMin = 0, outEnvelope.MMax = 10string json = "{\"hasM\":true,\"paths\":[[[0,0,1],[0,1,0],[1,1,-1],[1,0,-2]]]}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.OrientByMs(polyline);
// The points of outputPolyline are (x, y, m): (1, 0, -2), (1, 1, -1), (0, 1, 0), (0, 0, 1)
// M-values of second part is not monotonic, so it won't change. The first part will change.
json = "{\"hasM\":true,\"paths\":[[[0,0,1],[0,1,0],[1,1,-1],[1,0,-2]],[[5,4,6],[6,4,5],[8,6,7]]]}";
polyline = PolylineBuilderEx.FromJson(json);
outputPolyline = GeometryEngine.Instance.OrientByMs(polyline);
// The points of part 0 of outputPolyline are (x, y, m): (1, 0, -2), (1, 1, -1), (0, 1, 0), (0, 0, 1)
// The points of part 1 of outputPolyline are (x, y, m): (5, 4, 6), (6, 4, 5), (8, 6, 7)string json = "{\"hasM\":true,\"paths\":[[[5,4,6],[6,4,5],[8,6,7]],[[0,0,1],[0,1,0],[1,1,-1],[1,0,-2]]]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.QueryFirstLastM(polyline, out double firstM, out double lastM);
// firstM = 6, lastM = -2
json = "{\"hasM\":true,\"paths\":[[[5,4,null],[6,4,5],[8,6,7]],[[0,0,1],[0,1,0],[1,1,-1],[1,0,null]]]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.QueryFirstLastM(polyline, out firstM, out lastM);
// firstM = 5, lastM = -1
json = "{\"hasM\":true,\"paths\":[[[5,4,null],[6,4,null],[8,6,null]],[[0,0,null],[0,1,null],[1,1,null],[1,0,null]]]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.QueryFirstLastM(polyline, out firstM, out lastM);
// firstM and lastM are NaN
json = "{\"hasM\":true,\"paths\":[]}";
polyline = PolylineBuilderEx.FromJson(json);
GeometryEngine.Instance.QueryFirstLastM(polyline, out firstM, out lastM);
// firstM and lastM are NaNstring json = "{\"hasM\":true,\"paths\":[[[5,4,6],[6,4,5],[8,6,7]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.ReverseMs(polyline) as Polyline;
// The xy-coordinates in outputPolyline are not changed.
// The M-values in outputPolyline are: { 7, 5, 6 }Set Ms at the beginning and end of the geometry and interpolate M-values between the two values - SetAndInterpolateMsBetween
string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000],[-2000,-2000],[-1000,-2000],[0,-2000],[1000,-2000],[2000,-2000],[3000,-2000],[4000,-2000]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outPolyline = GeometryEngine.Instance.SetAndInterpolateMsBetween(polyline, 100, 800) as Polyline;
ReadOnlyPointCollection outPoints = outPolyline.Points;
// outPoints M values are { 100, 200, 300, 400, 500, 600, 700, 800 };string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,1],[-2000,-2000,2],[-1000,-2000,3],[0,-2000,null],[1000,-2000,4],[2000,-2000,5],[3000,-2000,10],[4000,-2000,11],[5000,-2000,12],[6000,-2000,13],[7000,-2000,14]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outPolyline = GeometryEngine.Instance.SetMsAsDistance(polyline, AsRatioOrLength.AsLength) as Polyline;
// The xy-coordinates don't change.
// The M-values of the vertices in outPolyline are (x, y, m):
// { 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000 }
json = "{\"hasM\":true,\"rings\":[[[0,0],[0,3000],[4000,3000],[4000,0],[0,0]]],\"spatialReference\":{\"wkid\":3857}}";
polygon = PolygonBuilderEx.FromJson(json);
Polygon outPolygon = GeometryEngine.Instance.SetMsAsDistance(polygon, AsRatioOrLength.AsLength) as Polygon;
// The M-values of the vertices in outPolygon are (x, y, m): { 0, 3000, 7000, 10000, 14000 };Set the M-values of the vertices as scaled and offset distances measured along a polyline - SetMsAsDistance
string json = "{\"hasM\":true,\"paths\":[[[0,0,1],[3,0,2],[3,6,3],[7,6,4]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
Coordinate2D origin = new(0, 0);
Polyline outputPolyline = GeometryEngine.Instance.SetMsAsDistance(polyline, origin, 0.5, 1, true) as Polyline;
// The xy-coordinates of the polyline don't change.
// The points of outputPolyline are (x, y, m):
// (0, 0, 1), (3, 0, 2.5), (3, 6, 5.5), (7, 6, 7.5)
// Measurements will start at the end of the polyline, point (7, 6)
origin = new Coordinate2D(4, 6);
outputPolyline = GeometryEngine.Instance.SetMsAsDistance(polyline, origin, 0.5, 1, true) as Polyline;
// The points of outputPolyline are (x, y, m):
// (0, 0, 7.5), (3, 0, 6), (3, 6, 3), (7, 6, 1)SpatialReference sr = SpatialReferences.WebMercator; // precision = 1 / MScale = 0.0001
// MapPoint
MapPointBuilderEx pointBuilder = new(3, 4, sr)
{
M = 5.00006
};
MapPoint point = pointBuilder.ToGeometry();
MapPoint outputPoint = GeometryEngine.Instance.SnapMsToSpatialReference(point) as MapPoint;
// outputPoint.M = 5.0001
// Multipoint
MapPointBuilderEx mapPointBuilderEx = new(-3, -4, sr)
{
M = -5.000007
};
pointBuilder = mapPointBuilderEx;
MapPoint point2 = pointBuilder.ToGeometry();
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint([point, point2], AttributeFlags.HasM, sr);
Multipoint outputMultipoint = GeometryEngine.Instance.SnapMsToSpatialReference(multipoint) as Multipoint;
// outputMultipoint.Points[0].M = 5.0001, outputMultipoint.Points[1].M = -5
// Polyline
string json = "{\"hasM\":true,\"paths\":[[[3,2,10.00065],[3,4,15.000325],[5,4,20],[5,2,15.000325],[3,2,10.00065]]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.SnapMsToSpatialReference(polyline) as Polyline;
// The M-values for the vertices in outputPolyline are { 10.0007, 15.0003, 20, 15.0003, 10.0007 }Set the M-values of the vertices as scaled and offset M distances measured along a polyline - UpdateAllMsByMs
string json = "{\"hasM\":true,\"paths\":[[[-8,2,1],[-8,5,8],[-5,5,0],[-5,7,12]],[[3,2,20],[7,2,30],[7,4,10],[13,4,5]]]}";
polyline = PolylineBuilderEx.FromJson(json);
Coordinate2D origin = new(-5, 6);
Polyline outputPolyline = GeometryEngine.Instance.UpdateAllMsByMs(polyline, origin, 1, 0, true);
// The xy-coordinates don't change.
// The M-values of the vertices in part 0 of outputPolyline are { 27, 20, 12, 0 }
// The M-values of the vertices in part 1 of outputPolyline are { 27, 37, 57, 62 }
outputPolyline = GeometryEngine.Instance.UpdateAllMsByMs(polyline, origin, 2, 4, true);
// The M-values of the vertices in part 0 of outputPolyline are { 58, 44, 28, 4 }
// The M-values of the vertices in part 1 of outputPolyline are { 58, 78, 118, 128 }string json = "{\"hasM\":true,\"paths\":[[[-8,2,1],[-8,5,8],[-5,5,0],[-5,7,12]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.UpdateMsByDistance(polyline, 0, 0, 0, 2, 10, 20, UpdateMMethod.Interpolate, true);
// The xy-coordinates don't change.
// The M-values of the vertices in outputPolyline are { 10, 15, 20, 12 }
json = "{\"hasM\":true,\"paths\":[[[-8,2,1],[-8,5,8],[-5,5,0],[-5,7,12]],[[3,2,20],[7,2,30],[7,4,10],[13,4,5]]]}";
polyline = PolylineBuilderEx.FromJson(json);
outputPolyline = GeometryEngine.Instance.UpdateMsByDistance(polyline, 0, 2, 1, 1, 10, 20, UpdateMMethod.ExtrapolateBefore, true);
// The M-values of the vertices in part 0 of outputPolyline are { -5, 2.5, 10, 5 }
// The M-values of the vertices in part 1 of outputPolyline are { 20, 20, 10, 5 }Update M-values with the interpolation ratio determined by existing M-values and the input M-values - UpdateMsByMs
string json = "{\"hasM\":true,\"paths\":[[[-8,2,1],[-8,5,8],[-5,5,0],[-5,7,12]]],\"spatialReference\":{\"wkid\":4326}}";
polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.UpdateMsByMs(polyline, 0, 1, 0, 3, -2, 14, UpdateMMethod.Interpolate);
// The xy-coordinates don't change.
// The M-values of the vertices in outputPolyline are (x, y, m): { 1, -2, 30, 14 }MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0);
MapPoint ptResult = GeometryEngine.Instance.Move(pt, -3.5, 2.5) as MapPoint;
// ptResult is (-2.5, 5.5)MapPoint zPt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 2.0);
MapPoint zPtResult = GeometryEngine.Instance.Move(zPt, 4, 0.25, 0.5) as MapPoint;
// zPtResult is (5.0, 3.25, 2.5);List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3, 2, 3.0),
MapPointBuilderEx.CreateMapPoint(4.0, 2.0, 3.0),
];
polyline = PolylineBuilderEx.CreatePolyline(pts);
Geometry geometry = GeometryEngine.Instance.Move(polyline, 3, 2);
Polyline polylineResult = geometry as Polyline;
// polylineResult.Points[0] = 4.0, 3.0, 3.0
// polylineResult.Points[1] = 6.0, 5.0, 3.0
// polylineResult.Points[2] = 6.0, 4.0, 3.0
// polylineResult.Points[3] = 7.0, 4.0, 3.0LineSegment line = LineBuilderEx.CreateLineSegment(MapPointBuilderEx.CreateMapPoint(0, 3), MapPointBuilderEx.CreateMapPoint(5.0, 3.0));
polyline = PolylineBuilderEx.CreatePolyline(line);
bool simple = GeometryEngine.Instance.IsSimpleAsFeature(polyline);
// ratio = false
MapPoint pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 1.0, false, 0.0, SegmentExtensionType.NoExtension);
// pt = 1.0, 3.0
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 1.0, false, -1.0, SegmentExtensionType.NoExtension);
// pt = 1.0, 4.0
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 1.0, false, 2.0, SegmentExtensionType.NoExtension);
// pt = 1.0, 1.0
// ratio = true
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 0.5, true, 0, SegmentExtensionType.NoExtension);
// pt = 2.5, 3.0
// move past the line
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 7, false, 0, SegmentExtensionType.NoExtension);
// pt = 5.0, 3.0
// move past the line with extension at "to" point
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 7, false, 0, SegmentExtensionType.ExtendEmbeddedAtTo);
// pt = 7.0, 3.0
// negative distance with extension at "from" point
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, -2, false, 0, SegmentExtensionType.ExtendEmbeddedAtFrom);
// pt = -2.0, 3.0
// ratio = true
pt = GeometryEngine.Instance.MovePointAlongLine(polyline, 0.5, true, 0, SegmentExtensionType.NoExtension);
// pt = 2.5, 3.0
// line with Z
List<Coordinate3D> coords3D = [new Coordinate3D(0, 0, 0), new Coordinate3D(1113195, 1118890, 5000)];
Polyline polylineZ = PolylineBuilderEx.CreatePolyline(coords3D, SpatialReferences.WebMercator);
// polylineZ.HasZ = true
// ratio = true, no offset
pt = GeometryEngine.Instance.MovePointAlongLine(polylineZ, 0.5, true, 0, SegmentExtensionType.NoExtension);
// pt.X = 556597.5
// pt.Y = 559445
// pt.Z = 2500
// ratio = true, past the line with "to" extension, no offset
pt = GeometryEngine.Instance.MovePointAlongLine(polylineZ, 1.5, true, 0, SegmentExtensionType.ExtendEmbeddedAtTo);
// pt.X = 1669792.5
// pt.Y = 1678335
// pt.Z = 7500
// ratio = true, negative distance past the line with no extension, no offset
pt = GeometryEngine.Instance.MovePointAlongLine(polylineZ, -1.5, true, 0, SegmentExtensionType.NoExtension);
// pt.X = 0
// pt.Y = 0
// pt.Z = -7500
// polyline with Z but 2d distance = 0
MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(5, 5, 0);
MapPoint pt4 = MapPointBuilderEx.CreateMapPoint(5, 5, 10);
List<MapPoint> pts = [pt3, pt4];
polyline = PolylineBuilderEx.CreatePolyline(pts);
// polyline.HasZ = true
// polyline.Length3D = 10
// polyline.Length = 0
MapPoint result = GeometryEngine.Instance.MovePointAlongLine(polyline, 2, false, 0, SegmentExtensionType.NoExtension);
// result = 5, 5, 2
// polyline with length2d = 0 and length3d = 0
MapPoint pt5 = MapPointBuilderEx.CreateMapPoint(5, 5, 10);
MapPoint pt6 = MapPointBuilderEx.CreateMapPoint(5, 5, 10);
pts.Clear();
pts.Add(pt5);
pts.Add(pt6);
polyline = PolylineBuilderEx.CreatePolyline(pts);
// polyline.HasZ = true
// polyline.Length3D = 0
// polyline.Length = 0
result = GeometryEngine.Instance.MovePointAlongLine(polyline, 3, true, 0, SegmentExtensionType.NoExtension);
// result = 5, 5, 10
result = GeometryEngine.Instance.MovePointAlongLine(polyline, 3, true, 0, SegmentExtensionType.ExtendEmbeddedAtFrom);
// result = 5, 5, 10
// polyline with Z and M
List<MapPoint> inputPoints =
[
MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4),
MapPointBuilderEx.CreateMapPoint(1, 2, 33, 44),
];
Polyline polylineZM = PolylineBuilderEx.CreatePolyline(inputPoints, SpatialReferences.WGS84);
// polylineZM.HasZ = true
// polylineZM.HasM = true
// ratio = true, no offset
MapPoint pointAlong = GeometryEngine.Instance.MovePointAlongLine(polylineZM, 0.5, true, 0, SegmentExtensionType.NoExtension);
// pointAlong = 1, 2, 18, 24
// ratio = true with offset
pointAlong = GeometryEngine.Instance.MovePointAlongLine(polylineZM, 0.2, true, 2.23606797749979, SegmentExtensionType.NoExtension);
// pointAlong = 1, 2, 9, 12List<Coordinate2D> coords2D =
[
new Coordinate2D(0, 0),
new Coordinate2D(1, 4),
new Coordinate2D(2, 7),
new Coordinate2D(-10, 3)
];
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(coords2D, SpatialReferences.WGS84);
IReadOnlyList<Geometry> result = GeometryEngine.Instance.MultipartToSinglePart(multipoint);
// result.Count = 4,
// 'explode' a multipart polygon
result = GeometryEngine.Instance.MultipartToSinglePart(multipartPolygon);
// create a bag of geometries
polygon = PolygonBuilderEx.CreatePolygon(coords2D, SpatialReferences.WGS84);
var bag = GeometryBagBuilderEx.CreateGeometryBag([multipoint, polygon]);
// bag.PartCount = =2
result = GeometryEngine.Instance.MultipartToSinglePart(bag);
// result.Count == 2
// result[0] is MultiPoint
// result[1] is PolygonSpatialReference sr = SpatialReferences.WGS84;
MapPoint pt = MapPointBuilderEx.CreateMapPoint(5, 5, sr);
List<Coordinate2D> coords =
[
new Coordinate2D(10, 1),
new Coordinate2D(10, -4),
new Coordinate2D(0, -4),
new Coordinate2D(0, 1),
new Coordinate2D(10, 1)
];
polygon = PolygonBuilderEx.CreatePolygon(coords);
// find the nearest point in the polygon geometry to the pt
ProximityResult result = GeometryEngine.Instance.NearestPoint(polygon, pt);
// result.Point = 5, 1
// result.SegmentIndex = 3
// result.PartIndex = 0
// result.PointIndex = null
//result.Distance = 4
//result.RightSide = false
// find the nearest vertex in the polgyon geometry to the pt
result = GeometryEngine.Instance.NearestVertex(polygon, pt);
// result.Point = 10, 1
// result.PointIndex = 0
// result.SegmentIndex = null
// result.PartIndex = 0
// result.Distance = Math.Sqrt(41)
// result.RightSide = falseMapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1, 1, 1);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2, 2, 2);
MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(10, 2, 1);
//
// test pt1 to pt2
//
ProximityResult result = GeometryEngine.Instance.NearestPoint3D(pt1, pt2);
// result.Point = 1,1,1
// result.Distance = Math.Sqrt(3)
// result.SegmentIndex = null
// result.PartIndex = 0
// result.PointIndex = 0
// result.RightSide = false
//
// multipoint built from pt1, pt2. should be closer to pt2
//
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint([pt1, pt2]);
result = GeometryEngine.Instance.NearestPoint3D(multipoint, pt3);
// result.Point = 2, 2, 2
// result.Distance = Math.Sqrt(65)
// result.SegmentIndex = null
// result.PartIndex = 1
// result.PointIndex = 1
// result.RightSide = falseList<MapPoint> linePts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(10.0, 1.0, SpatialReferences.WGS84),
];
polyline = PolylineBuilderEx.CreatePolyline(linePts);
Geometry g = GeometryEngine.Instance.Offset(polyline, 10, OffsetType.Square, 0);
Polyline gResult = g as Polyline;
// gResult.PointCount = 2
// gResult.Points[0] = (1, -9)
// gResult.Points[1] = (10, -9)
g = GeometryEngine.Instance.Offset(polyline, -10, OffsetType.Round, 0.5);
gResult = g as Polyline;
// gResult.PointCount = 2
// gResult.Points[0] = (1, -11
// gResult.Points[1] = (10, 11)
//
// elliptic arc curve
//
Coordinate2D fromPt = new(2, 1);
Coordinate2D toPt = new(1, 2);
Coordinate2D interiorPt = new(1 + Math.Sqrt(2) / 2, 1 + Math.Sqrt(2) / 2);
EllipticArcSegment circularArc = EllipticArcBuilderEx.CreateCircularArc(fromPt.ToMapPoint(), toPt.ToMapPoint(), interiorPt);
polyline = PolylineBuilderEx.CreatePolyline(circularArc);
g = GeometryEngine.Instance.Offset(polyline, -0.25, OffsetType.Miter, 0.5);
gResult = g as Polyline;
g = GeometryEngine.Instance.Offset(polyline, 0.25, OffsetType.Bevel, 0.5);
gResult = g as Polyline;
//
// offset for a polygon
//
List<MapPoint> list =
[
MapPointBuilderEx.CreateMapPoint(10.0, 10.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(10.0, 20.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(20.0, 20.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(20.0, 10.0, SpatialReferences.WGS84),
];
polygon = PolygonBuilderEx.CreatePolygon(list);
g = GeometryEngine.Instance.Offset(polygon, 2, OffsetType.Square, 0);
Polygon gPolygon = g as Polygon;
g = GeometryEngine.Instance.Offset(polygon, -2, OffsetType.Round, 0.3);
gPolygon = g as Polygon;
g = GeometryEngine.Instance.Offset(polygon, -0.5, OffsetType.Miter, 0.6);
gPolygon = g as Polygon;MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1.5, 1.5);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(1.25, 1.75);
MapPoint pt3 = MapPointBuilderEx.CreateMapPoint(3, 1.5);
MapPoint pt4 = MapPointBuilderEx.CreateMapPoint(1.5, 2);
//
// point and point overlap
//
bool overlaps = GeometryEngine.Instance.Overlaps(pt1, pt2); // overlaps = false
overlaps = GeometryEngine.Instance.Overlaps(pt1, pt1); // overlaps = false
// Two geometries overlap if the region of their intersection is of the same dimension as the geometries involved and
// is not equivalent to either of the geometries.
List<MapPoint> pts = [pt1, pt2, pt3];
List<MapPoint> pts2 = [pt2, pt3, pt4];
//
// pt and line overlap
//
polyline = PolylineBuilderEx.CreatePolyline(pts);
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polyline); // isSimple = true
overlaps = GeometryEngine.Instance.Overlaps(polyline, pt1); // overlaps = false
//
// line and line
//
Polyline polyline2 = PolylineBuilderEx.CreatePolyline(pts2);
isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polyline2); // isSimple = true
overlaps = GeometryEngine.Instance.Overlaps(polyline, polyline2); // overlaps = trueMapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0, SpatialReferences.WGS84);
Geometry result = GeometryEngine.Instance.Project(pt, SpatialReferences.WebMercator);
MapPoint projectedPt = result as MapPoint;// create the polygon
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0, SpatialReferences.WGS84),
];
polygon = PolygonBuilderEx.CreatePolygon(pts);
// ensure it is simple
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polygon);
// create the spatial reference to project to
SpatialReference northPole = SpatialReferenceBuilder.CreateSpatialReference(102018); // north pole stereographic
// project
Geometry geometry = GeometryEngine.Instance.Project(polygon, northPole);string json = "{\"curvePaths\":[[[-13046586.8335,4036570.6796000004]," +
"{\"c\":[[-13046645.107099999,4037152.5873000026]," +
"[-13046132.776277589,4036932.1325614937]]}]],\"spatialReference\":{\"wkid\":3857}}";
polyline = PolylineBuilderEx.FromJson(json);
EllipticArcSegment arc = polyline.Parts[0][0] as EllipticArcSegment;
// No extension, distanceAlongCurve = 0.5
// use the polyline
Polyline poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.NoExtension, 0.5, AsRatioOrLength.AsRatio, 1000);
// or a segment
LineSegment seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.NoExtension, 0.5, AsRatioOrLength.AsRatio, 1000);
// TangentAtFrom, distanceAlongCurve = -1.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendTangentAtFrom, -1.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendTangentAtFrom, -1.2, AsRatioOrLength.AsRatio, 1000);
// TangentAtTo (ignored because distanceAlongCurve < 0), distanceAlongCurve = -1.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendTangentAtTo, -1.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendTangentAtTo, -1.2, AsRatioOrLength.AsRatio, 1000);
// TangentAtTo, distanceAlongCurve = 1.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendTangentAtTo, 1.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendTangentAtTo, 1.2, AsRatioOrLength.AsRatio, 1000);
// TangentAtFrom (ignored because distanceAlongCurve > 0), distanceAlongCurve = 1.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendTangentAtFrom, 1.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendTangentAtFrom, 1.2, AsRatioOrLength.AsRatio, 1000);
// EmbeddedAtTo, distanceAlongCurve = 1.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendEmbeddedAtTo, 1.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendEmbeddedAtTo, 1.2, AsRatioOrLength.AsRatio, 1000);
// EmbeddedAtFrom, distanceAlongCurve = -0.2
poly_normal = GeometryEngine.Instance.QueryNormal(polyline, SegmentExtensionType.ExtendEmbeddedAtFrom, -0.2, AsRatioOrLength.AsRatio, 1000);
seg_normal = GeometryEngine.Instance.QueryNormal(arc, SegmentExtensionType.ExtendEmbeddedAtFrom, -0.2, AsRatioOrLength.AsRatio, 1000);SpatialReference sr = SpatialReferences.WGS84;
// Horizontal line segment
Coordinate2D start = new(1, 1);
Coordinate2D end = new(11, 1);
LineSegment line = LineBuilderEx.CreateLineSegment(start, end, sr);
polyline = PolylineBuilderEx.CreatePolyline(line);
// Don't extend the segment
MapPoint outPoint = GeometryEngine.Instance.QueryPoint(polyline, SegmentExtensionType.NoExtension, 1.0, AsRatioOrLength.AsLength);
// outPoint = (2, 1)
// or the segment
MapPoint outPoint_seg = GeometryEngine.Instance.QueryPoint(line, SegmentExtensionType.NoExtension, 1.0, AsRatioOrLength.AsLength);
// outPoint_seg = (2, 1)
// Extend infinitely in both directions
outPoint = GeometryEngine.Instance.QueryPoint(polyline, SegmentExtensionType.ExtendTangents, 1.5, AsRatioOrLength.AsRatio);
// outPoint = (16, 1)
outPoint_seg = GeometryEngine.Instance.QueryPoint(line, SegmentExtensionType.ExtendTangents, 1.5, AsRatioOrLength.AsRatio);
// outPoint_seg = (16, 1)// Horizontal line segment
List<MapPoint> linePts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84),
MapPointBuilderEx.CreateMapPoint(11.0, 1.0, SpatialReferences.WGS84),
];
polyline = PolylineBuilderEx.CreatePolyline(linePts);
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polyline);
// Don't extend the segment
SegmentExtensionType extension = SegmentExtensionType.NoExtension;
// A point on the line segment
MapPoint inPoint = MapPointBuilderEx.CreateMapPoint(2, 1, SpatialReferences.WGS84);
AsRatioOrLength asRatioOrLength = AsRatioOrLength.AsLength;
MapPoint outPoint = GeometryEngine.Instance.QueryPointAndDistance(polyline, extension, inPoint, asRatioOrLength, out double distanceAlongCurve, out double distanceFromCurve, out LeftOrRightSide whichSide);
// outPoint = 2, 1
// distanceAlongCurve = 1
// distanceFromCurve = 0
// whichSide = GeometryEngine.Instance.LeftOrRightSide.LeftSide
// Extend infinitely in both directions
extension = SegmentExtensionType.ExtendTangents;
// A point on the left side
inPoint = MapPointBuilderEx.CreateMapPoint(16, 6, SpatialReferences.WGS84);
asRatioOrLength = AsRatioOrLength.AsRatio;
outPoint = GeometryEngine.Instance.QueryPointAndDistance(polyline, extension, inPoint, asRatioOrLength, out distanceAlongCurve, out distanceFromCurve, out whichSide);
// outPoint = 16, 1
// distanceAlongCurve = 1.5
// distanceFromCurve = 5
// whichSide = GeometryEngine.Instance.LeftOrRightSide.LeftSideLineSegment line = LineBuilderEx.CreateLineSegment(new Coordinate2D(0, 0), new Coordinate2D(1, 0));
// No extension, distanceAlongCurve = 0.5
LineSegment tangent = GeometryEngine.Instance.QueryTangent(line, SegmentExtensionType.NoExtension, 0.5, AsRatioOrLength.AsRatio, 1);
// tangent.StartCoordinate = (0.5, 0.0)
// tangent.EndCoordinate = (1.5, 0.0)
tangent = GeometryEngine.Instance.QueryTangent(line, SegmentExtensionType.NoExtension, 1.5, AsRatioOrLength.AsLength, 1);
// tangent.StartCoordinate = (1.0, 0.0)
// tangent.EndCoordinate = (2.0, 0.0)
tangent = GeometryEngine.Instance.QueryTangent(line, SegmentExtensionType.ExtendTangentAtTo, 1.5, AsRatioOrLength.AsLength, 1);
// tangent.StartCoordinate = (1.5, 0.0)
// tangent.EndCoordinate = (2.5, 0.0)
tangent = GeometryEngine.Instance.QueryTangent(line, SegmentExtensionType.ExtendTangentAtFrom, -1.5, AsRatioOrLength.AsLength, 1);
// tangent.StartCoordinate = (-1.5, 0.0)
// tangent.EndCoordinate = (-0.5, 0.0)
tangent = GeometryEngine.Instance.QueryTangent(line, SegmentExtensionType.ExtendTangentAtFrom, -0.5, AsRatioOrLength.AsRatio, 1);
// tangent.StartCoordinate = (-0.5, 0.0)
// tangent.EndCoordinate = (0.5, 0.0)SpatialReference sr = SpatialReferences.WGS84;
Coordinate2D start = new(0, 0);
Coordinate2D end = new(4, 4);
LineSegment line = LineBuilderEx.CreateLineSegment(start, end, sr);
Coordinate2D[] coords =
[
new Coordinate2D(-1, 2),
new Coordinate2D(-1, 4),
new Coordinate2D(1, 4),
new Coordinate2D(-1, 2)
];
polygon = PolygonBuilderEx.CreatePolygon(coords, sr);
// reflect a polygon about the line
Polygon reflectedPolygon = GeometryEngine.Instance.ReflectAboutLine(polygon, line) as Polygon;
// reflectedPolygon points are
// (2, -1), (4, -1), (4, 1), (2, -1)// set up some geometries
// points
MapPoint point0 = MapPointBuilderEx.CreateMapPoint(0, 0, SpatialReferences.WGS84);
MapPoint point1 = MapPointBuilderEx.CreateMapPoint(1, 1, SpatialReferences.WGS84);
MapPoint point2 = MapPointBuilderEx.CreateMapPoint(-5, 5, SpatialReferences.WGS84);
// multipoint
List<MapPoint> points = [point0, point1, point2];
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(points, SpatialReferences.WGS84);
// polygon
List<Coordinate2D> polygonCoords =
[
new Coordinate2D(-10, 0),
new Coordinate2D(0, 10),
new Coordinate2D(10, 0),
new Coordinate2D(-10, 0)
];
polygon = PolygonBuilderEx.CreatePolygon(polygonCoords, SpatialReferences.WGS84);
// polylines
Polyline polyline1 = PolylineBuilderEx.CreatePolyline(LineBuilderEx.CreateLineSegment(new Coordinate2D(-9.1, 0.1), new Coordinate2D(0, 9)), SpatialReferences.WGS84);
Polyline polyline2 = PolylineBuilderEx.CreatePolyline(LineBuilderEx.CreateLineSegment(new Coordinate2D(-5, 5), new Coordinate2D(0, 5)), SpatialReferences.WGS84);
Polyline polyline3 = PolylineBuilderEx.CreatePolyline(LineBuilderEx.CreateLineSegment(new Coordinate2D(2.09, -2.04), new Coordinate2D(5, 10)), SpatialReferences.WGS84);
Polyline polyline4 = PolylineBuilderEx.CreatePolyline(LineBuilderEx.CreateLineSegment(new Coordinate2D(10, -5), new Coordinate2D(10, 5)), SpatialReferences.WGS84);
List<Segment> segments =
[
LineBuilderEx.CreateLineSegment(new Coordinate2D(5.05, -2.87), new Coordinate2D(6.35, 1.57)),
LineBuilderEx.CreateLineSegment(new Coordinate2D(6.35, 1.57), new Coordinate2D(4.13, 2.59)),
LineBuilderEx.CreateLineSegment(new Coordinate2D(4.13, 2.59), new Coordinate2D(5, 5))
];
Polyline polyline5 = PolylineBuilderEx.CreatePolyline(segments, SpatialReferences.WGS84);
segments.Add(LineBuilderEx.CreateLineSegment(new Coordinate2D(5, 5), new Coordinate2D(10, 10)));
Polyline polyline6 = PolylineBuilderEx.CreatePolyline(segments, SpatialReferences.WGS84);
Polyline polyline7 = PolylineBuilderEx.CreatePolyline(polyline5);
Polyline polyline8 = PolylineBuilderEx.CreatePolyline(LineBuilderEx.CreateLineSegment(new Coordinate2D(5, 5), new Coordinate2D(10, 10)), SpatialReferences.WGS84);
segments.Clear();
segments.Add(LineBuilderEx.CreateLineSegment(new Coordinate2D(0.6, 3.5), new Coordinate2D(0.7, 7)));
segments.Add(LineBuilderEx.CreateLineSegment(new Coordinate2D(0.7, 7), new Coordinate2D(3, 9)));
Polyline polyline9 = PolylineBuilderEx.CreatePolyline(segments, SpatialReferences.WGS84);
// now do the Related tests
// Interior/Interior Intersects
string scl = "T********";
bool related = GeometryEngine.Instance.Relate(polygon, polyline1, scl); // related = true
related = GeometryEngine.Instance.Relate(point0, point1, scl); // related = false
related = GeometryEngine.Instance.Relate(point0, multipoint, scl); // related = true
related = GeometryEngine.Instance.Relate(multipoint, polygon, scl); // related = true
related = GeometryEngine.Instance.Relate(multipoint, polyline1, scl); // related = false
related = GeometryEngine.Instance.Relate(polyline2, point2, scl); // related = false
related = GeometryEngine.Instance.Relate(point1, polygon, scl); // related = true
// Interior/Boundary Intersects
scl = "*T*******";
related = GeometryEngine.Instance.Relate(polygon, polyline2, scl); // related = true
related = GeometryEngine.Instance.Relate(polygon, polyline3, scl); // related = false
related = GeometryEngine.Instance.Relate(point1, polygon, scl); // related = false
// Boundary/Boundary Interior intersects
scl = "***T*****";
related = GeometryEngine.Instance.Relate(polygon, polyline4, scl); // related = true
// Overlaps Dim1
scl = "1*T***T**";
related = GeometryEngine.Instance.Relate(polygon, polyline5, scl); // related = true
// Crosses Area/Line (LineB crosses PolygonA)
scl = "1020F1102";
related = GeometryEngine.Instance.Relate(polygon, polyline6, scl); // related = false
related = GeometryEngine.Instance.Relate(polygon, polyline9, scl); // related = true
// Boundary/Boundary Touches
scl = "F***T****";
related = GeometryEngine.Instance.Relate(polygon, polyline7, scl); // related = false
related = GeometryEngine.Instance.Relate(polygon, polyline8, scl); // related = trueList<Coordinate3D> coordsZ =
[
new Coordinate3D(1, 2, double.NaN),
new Coordinate3D(4, 5, 3),
new Coordinate3D(7, 8, double.NaN)
];
polygon = PolygonBuilderEx.CreatePolygon(coordsZ);
// polygon.HasZ = true
Polygon polygonZReplaced = GeometryEngine.Instance.ReplaceNaNZs(polygon, -1) as Polygon;
// polygonZReplaced.Points[0].Z = -1
// polygonZReplaced.Points[1].Z = 3
// polygonZReplaced.Points[2].Z = -1List<Coordinate2D> polygon1Coords =
[
new Coordinate2D(0, -11000),
new Coordinate2D(1000, -11000),
new Coordinate2D(1000, -12000),
new Coordinate2D(0, -12000),
new Coordinate2D(0, -11000)
];
// reshaper coordinates intersect the polygon
List<Coordinate2D> reshaperCoords =
[
new Coordinate2D(1500, -11800),
new Coordinate2D(-2600, -11800)
];
SpatialReference sr = SpatialReferenceBuilder.CreateSpatialReference(102010);
Polygon polygon1 = PolygonBuilderEx.CreatePolygon(polygon1Coords, sr);
Polyline reshaper = PolylineBuilderEx.CreatePolyline(reshaperCoords, sr);
Polygon outPolygon = GeometryEngine.Instance.Reshape(polygon1, reshaper) as Polygon;
// outPolygon.PartCount = 1
ReadOnlySegmentCollection segments = outPolygon.Parts[0];
// segments.Count = 4
// outPolygon.PointCount = 5
string json = GeometryEngine.Instance.ExportToJson(JsonExportFlags.JsonExportSkipCRS, outPolygon);
// json = "{\"rings\":[[[0,-11800],[0,-11000],[1000,-11000],[1000,-11800],[0,-11800]]]}";
// example where the Reshaper polyline doesn't intersect the input
reshaperCoords.Clear();
reshaperCoords.Add(new Coordinate2D(1000, 1000));
reshaperCoords.Add(new Coordinate2D(2000, 1000));
reshaper = PolylineBuilderEx.CreatePolyline(reshaperCoords, sr);
outPolygon = GeometryEngine.Instance.Reshape(polygon1, reshaper) as Polygon;
// outPolygon = nullList<Coordinate2D> list2D =
[
new Coordinate2D(1.0, 1.0),
new Coordinate2D(1.0, 2.0),
new Coordinate2D(2.0, 2.0),
new Coordinate2D(2.0, 1.0),
];
polygon = PolygonBuilderEx.CreatePolygon(list2D);
Geometry g = GeometryEngine.Instance.ReverseOrientation(polygon);
Polygon gPolygon = g as Polygon;
// gPolygon.Points[0] = 1.0, 1.0
// gPolygon.Points[1] = 2.0, 1.0
// gPolygon.Points[2] = 2.0, 2.0
// gPolygon.Points[3] = 1.0, 2.0
// gPolygon.Points[4] = 1.0, 1.0
// gPolygon.Area = -1 * polygon.Area{
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0);
MapPoint rotatePt = MapPointBuilderEx.CreateMapPoint(3.0, 3.0);
Geometry result = GeometryEngine.Instance.Rotate(pt, rotatePt, Math.PI / 2);
}
// result point is (3, 1)// rotate a polyline
MapPoint fixedPt = MapPointBuilderEx.CreateMapPoint(3.0, 3.0);
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 5.0),
MapPointBuilderEx.CreateMapPoint(5, 5),
MapPointBuilderEx.CreateMapPoint(5.0, 1.0),
];
polyline = PolylineBuilderEx.CreatePolyline(pts);
Polyline rotated = GeometryEngine.Instance.Rotate(polyline, fixedPt, Math.PI / 4) as Polyline; // rotate 45 degList<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3, 3, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0, 3.0),
];
MapPoint midPt = MapPointBuilderEx.CreateMapPoint(1.5, 1.5);
// polyline
polyline = PolylineBuilderEx.CreatePolyline(pts);
// polyline.Length = 6
// polyline.Length3D = 0
Geometry g = GeometryEngine.Instance.Scale(polyline, midPt, 0.5, 0.5);
Polyline resultPolyline = g as Polyline;
// resultPolyline.length = 3
// resultPolyline.Points[0] = 1.25, 1.25, 3
// resultPolyline.Points[1] = 1.25, 2.25, 3
// resultPolyline.Points[2] = 2.25, 2.25, 3
// resultPolyline.Points[3] = 2.25, 1.25, 3
// 3D point - scale in 3d
MapPoint midPtZ = MapPointBuilderEx.CreateMapPoint(1.5, 1.5, 1);
g = GeometryEngine.Instance.Scale(polyline, midPtZ, 0.5, 0.5, 0.25);
resultPolyline = g as Polyline;
// resultPolyline.Points[0] = 1.25, 1.25, 1.5
// resultPolyline.Points[1] = 1.25, 2.25, 1.5
// resultPolyline.Points[2] = 2.25, 2.25, 1.5
// resultPolyline.Points[3] = 2.25, 1.25, 1.5List<Coordinate3D> coordsZ =
[
new Coordinate3D(1, 2, 3),
new Coordinate3D(4, 5, 6),
new Coordinate3D(7, 8, double.NaN)
];
polyline = PolylineBuilderEx.CreatePolyline(coordsZ);
// polyline.HasZ = true
Polyline polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, -1) as Polyline;
// polylineSetZ.Points[0].Z = -1
// polylineSetZ.Points[1].Z = -1
// polylineSetZ.Points[2].Z = -1
polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.NaN) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = NaN
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = NaN
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = NaN
polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.PositiveInfinity) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = double.PositiveInfinity
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = double.PositiveInfinity
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = double.PositiveInfinity// pt
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0, SpatialReferences.WebMercator);
double area = GeometryEngine.Instance.ShapePreservingArea(pt); // area = 0
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3, 3, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0, 3.0),
];
// multipoint
Multipoint mPt = MultipointBuilderEx.CreateMultipoint(pts);
area = GeometryEngine.Instance.ShapePreservingArea(mPt); // area = 0
// polyline
polyline = PolylineBuilderEx.CreatePolyline(pts);
area = GeometryEngine.Instance.ShapePreservingArea(polyline); // area = 0
// polygon
polygon = PolygonBuilderEx.CreatePolygon(pts, SpatialReferences.WGS84);
area = GeometryEngine.Instance.ShapePreservingArea(polygon);
polygon = PolygonBuilderEx.CreatePolygon(pts, SpatialReferences.WebMercator);
area = GeometryEngine.Instance.ShapePreservingArea(polygon);
polygon = PolygonBuilderEx.CreatePolygon(
[
MapPointBuilderEx.CreateMapPoint( -170, 45),
MapPointBuilderEx.CreateMapPoint( 170, 45),
MapPointBuilderEx.CreateMapPoint( 170, -45),
MapPointBuilderEx.CreateMapPoint( -170, -54)
], SpatialReferences.WGS84);
var area_meters = GeometryEngine.Instance.ShapePreservingArea(polygon);// , AreaUnits.SquareMeters);
var area_miles = GeometryEngine.Instance.ShapePreservingArea(polygon, AreaUnit.SquareMiles);
// area_meters - 352556425383104.37
// area_miles - 136122796.848425// pt
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0, SpatialReferences.WebMercator);
double len = GeometryEngine.Instance.ShapePreservingLength(pt); // len = 0
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 3.0),
MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 3.0),
MapPointBuilderEx.CreateMapPoint(3, 3, 3.0),
MapPointBuilderEx.CreateMapPoint(3.0, 1.0, 3.0),
];
// multipoint
Multipoint mPt = MultipointBuilderEx.CreateMultipoint(pts);
len = GeometryEngine.Instance.ShapePreservingLength(mPt); // len = 0
// polyline
polyline = PolylineBuilderEx.CreatePolyline(pts, SpatialReferences.WGS84);
len = GeometryEngine.Instance.ShapePreservingLength(polyline);
// polygon
polygon = PolygonBuilderEx.CreatePolygon(pts, SpatialReferences.WGS84);
len = GeometryEngine.Instance.ShapePreservingLength(polygon);
polyline = PolylineBuilderEx.CreatePolyline(
[
MapPointBuilderEx.CreateMapPoint( -170, 0),
MapPointBuilderEx.CreateMapPoint( 170, 0)
], SpatialReferences.WGS84);
var length_meters = GeometryEngine.Instance.ShapePreservingLength(polyline); // , LinearUnits.Meters);
var length_miles = GeometryEngine.Instance.ShapePreservingLength(polyline, LinearUnit.Miles);
// length_meters - 37848626.869713023
// length_miles - 23518.046402579574// right side, round caps
SpatialReference sr = SpatialReferenceBuilder.CreateSpatialReference(102010);
List<Coordinate2D> coords =
[
new Coordinate2D(1200, 5800),
new Coordinate2D(1400, 5800),
new Coordinate2D(1400, 6000),
new Coordinate2D(1300, 6000),
new Coordinate2D(1300, 5700)
];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
Polygon output = GeometryEngine.Instance.SideBuffer(polyline, 20, LeftOrRightSide.RightSide, LineCapType.Round) as Polygon;SpatialReference spatialReference = SpatialReferenceBuilder.CreateSpatialReference(102010);
List<Coordinate2D> coordinates =
[
new Coordinate2D(1200, 5800),
new Coordinate2D(1400, 5800),
new Coordinate2D(1400, 6000),
new Coordinate2D(1300, 6000),
new Coordinate2D(1300, 5700)
];
Polyline polyline1 = PolylineBuilderEx.CreatePolyline(coordinates, spatialReference);
coordinates.Clear();
coordinates.Add(new Coordinate2D(1400, 6050));
coordinates.Add(new Coordinate2D(1600, 6150));
coordinates.Add(new Coordinate2D(1800, 6050));
Polyline polyline2 = PolylineBuilderEx.CreatePolyline(coordinates, spatialReference);
List<Polyline> polylines = [polyline1, polyline2];
IReadOnlyList<Geometry> outGeometries = GeometryEngine.Instance.SideBuffer(polylines, 10, LeftOrRightSide.RightSide, LineCapType.Round);var g1 = PolygonBuilderEx.FromJson("{\"rings\": [ [ [0, 0], [10, 0], [10, 10], [0, 10] ] ] }");
var result = GeometryEngine.Instance.Area(g1); // result = -100.0 - negative due to wrong ring orientation
// simplify it
var result2 = GeometryEngine.Instance.Area(GeometryEngine.Instance.SimplifyAsFeature(g1, true));
// result2 = 100.0 - positive due to correct ring orientation (clockwise)SpatialReference sr = SpatialReferences.WGS84;
Coordinate2D[] coords = [new Coordinate2D(5, 10), new Coordinate2D(15, 20), new Coordinate2D(25, 10), new Coordinate2D(5, 20)];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
bool isSimple = GeometryEngine.Instance.GetNonSimpleReason(polyline, out NonSimpleReason nonSimpleReason);
// isSimple = true;
// nonSimpleReason = NonSimpleReason.IsSimple
double resolution = sr.XYResolution;
coords = [new Coordinate2D(0, 0), new Coordinate2D(0, 1.8 * resolution), new Coordinate2D(10, 10), new Coordinate2D(0, 5)];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
isSimple = GeometryEngine.Instance.GetNonSimpleReason(polyline, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.ShortSegments
coords = [ new Coordinate2D(10, 10), new Coordinate2D(10, 20), new Coordinate2D(40, 20),
new Coordinate2D(40, 10), new Coordinate2D(60, 10), new Coordinate2D(70, 10)];
polygon = PolygonBuilderEx.CreatePolygon(coords, sr);
isSimple = GeometryEngine.Instance.GetNonSimpleReason(polygon, out nonSimpleReason);
//isSimple = false
//nonSimpleReason = NonSimpleReason.SelfIntersectionsList<Coordinate2D> coords =
[
new Coordinate2D(8, 0),
new Coordinate2D(8, 4),
new Coordinate2D(6, 4),
new Coordinate2D(8, 4),
new Coordinate2D(10, 4),
new Coordinate2D(8, 4)
];
SpatialReference sr = SpatialReferences.WGS84;
// build a line that has segments that cross over each other
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
// polyline.PartCount = 1
ReadOnlyPartCollection parts = polyline.Parts;
ReadOnlySegmentCollection segments = parts[0];
// segments.Count = 5
// note there is a difference between SimpleAsFeature (doesn't detect intersections and overlaps, determines if it's simple enough for gdb storage)
// and SimplifyPolyline (does detect intersections etc)
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polyline, false);
// isSimple = true
// simplify it (with force = false)
// because it has already been deemed 'simple' (previous IsSimpleAsFeature call) no detection of intersections, overlaps occur
Polyline simplePolyline = GeometryEngine.Instance.SimplifyPolyline(polyline, SimplifyType.Planar, false);
// simplePolyline.PartCount = 1
ReadOnlyPartCollection simpleParts = simplePolyline.Parts;
ReadOnlySegmentCollection simpleSegments = simpleParts[0];
// simpleSegments.Count = 5
// simplify it (with force = true)
// detection of intersections, overlaps occur
simplePolyline = GeometryEngine.Instance.SimplifyPolyline(polyline, SimplifyType.Planar, true);
// simplePolyline.PartCount = 3
simpleParts = simplePolyline.Parts;
simpleSegments = simpleParts[0];
// simpleSegments.Count = 1SpatialReference sr = SpatialReferences.WGS84;
Coordinate2D[] coords = [new Coordinate2D(5, 10), new Coordinate2D(15, 20), new Coordinate2D(25, 10), new Coordinate2D(5, 20)];
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
// polyline.IsKnownSimpleOgc = false
// polyline.IsKnownSimple = false
bool isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out NonSimpleReason nonSimpleReason, true);
// isSimple = false
// nonSimpleReason = NonSimpleReason.SelfIntersections
Polyline simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true
double resolution = sr.XYResolution;
Coordinate3D[] coords3D = [ new Coordinate3D(0, 0, 0), new Coordinate3D(0, 1.8 * resolution, 0.8 * sr.ZTolerance), new Coordinate3D(10, 10, 1),
new Coordinate3D(0, 5, 1) ];
polyline = PolylineBuilderEx.CreatePolyline(coords3D, sr);
isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.ShortSegments
simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline, true) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true
coords = [new Coordinate2D(0, 0), new Coordinate2D(0, 0)];
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(coords, sr);
isSimple = GeometryEngine.Instance.IsSimpleOgc(multipoint, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.DuplicateVertexvar slices = GeometryEngine.Instance.SlicePolygonIntoEqualParts(polygon, 3, 0, SliceType.Blocks);
// slices.Count = 3
// simple polygon
List<Coordinate2D> list2D =
[
new Coordinate2D(1.0, 1.0),
new Coordinate2D(1.0, 2.0),
new Coordinate2D(2.0, 2.0),
new Coordinate2D(2.0, 1.0),
];
Polygon p = PolygonBuilderEx.CreatePolygon(list2D);
slices = GeometryEngine.Instance.SlicePolygonIntoEqualParts(p, 2, 0, SliceType.Strips);
// slice[0] coordinates - (1.0, 1.0), (1.0, 1.5), (2.0, 1.5), (2.0, 1.0), (1.0, 1.0)
// slice[1] coordinates - (1.0, 1.5), (1.0, 2.0), (2.0, 2.0), (2.0, 1.5), (1.0, 1.5)
slices = GeometryEngine.Instance.SlicePolygonIntoEqualParts(p, 2, Math.PI / 4, SliceType.Strips);
// slice[0] coordinates - (1.0, 1.0), (1.0, 2.0), (2.0, 1.0), (1.0, 1.0)
// slice[1] coordinates - (1.0, 2.0), (2.0, 2.0), (2.0, 1.0), (1.0, 2.0)// smooth with a maxDeviation of 0
Polyline smoothPolyline = GeometryEngine.Instance.Smooth(polyline, 0) as Polyline;
// smooth with a maxDeviation of 0.5
smoothPolyline = GeometryEngine.Instance.Smooth(polyline, 0.5) as Polyline;
// smooth a polygon with a maxDeviation of 0
Polygon smoothPolygon = GeometryEngine.Instance.Smooth(polygon, 0) as Polygon;
// maxDeviation < 0 behaves as if maxDeviation = 0
smoothPolygon = GeometryEngine.Instance.Smooth(polygon, -1) as Polygon;
// NaN maxDeviation behaves as if maxDeviation = 0
smoothPolygon = GeometryEngine.Instance.Smooth(polygon, double.NaN) as Polygon;// define a polyline
MapPoint startPointZ = MapPointBuilderEx.CreateMapPoint(1, 1, 5);
MapPoint endPointZ = MapPointBuilderEx.CreateMapPoint(20, 1, 5);
Polyline polylineZ = PolylineBuilderEx.CreatePolyline([startPointZ, endPointZ]);
// define a split point
MapPoint splitPointAboveLine = MapPointBuilderEx.CreateMapPoint(10, 10, 10);
// split the polyline at the point. Don't project the split point onto the line, don't create a new part
var splitPolyline = GeometryEngine.Instance.SplitAtPoint(polylineZ, splitPointAboveLine, false, false, out bool splitOccurred, out int partIndex, out int segmentIndex);
// splitOccurred = true
// partIndex = 0
// segmentIndex = 1
// splitPolyline.PointCount = 3
// splitPolyline.PartCount = 1
// splitPolyline coordinates are (1, 1, 5), (10, 10, 10), (20, 1, 5)
// split the polyline at the point. dont project the split point onto the line, do create a new part
splitPolyline = GeometryEngine.Instance.SplitAtPoint(polylineZ, splitPointAboveLine, false, false, out splitOccurred, out partIndex, out segmentIndex);
// splitOccurred = true
// partIndex = 1
// segmentIndex = 0
// splitPolyline.PointCount = 4
// splitPolyline.PartCount = 2
// splitPolyline first part coordinates are (1, 1, 5), (10, 10, 10)
// splitPolyline second part coordinates are (10, 10, 10), (20, 1, 5)
// split the polyline at the point. do project the split point onto the line, don't create a new part
splitPolyline = GeometryEngine.Instance.SplitAtPoint(polylineZ, splitPointAboveLine, false, false, out splitOccurred, out partIndex, out segmentIndex);
// splitOccurred = true
// partIndex = 0
// segmentIndex = 1
// splitPolyline.PointCount = 3
// splitPolyline.PartCount = 1
// splitPolyline coordinates are (1, 1, 5), (10, 10, 5), (20, 1, 5)
// split the polyline at the point. do project the split point onto the line, do create a new part
splitPolyline = GeometryEngine.Instance.SplitAtPoint(polylineZ, splitPointAboveLine, false, false, out splitOccurred, out partIndex, out segmentIndex);
// splitOccurred = true
// partIndex = 1
// segmentIndex = 0
// splitPolyline.PointCount = 4
// splitPolyline.PartCount = 2
// splitPolyline first part coordinates are (1, 1, 5), (10, 10, 5)
// splitPolyline second part coordinates are (10, 10, 5), (20, 1, 5)
//
// try to split with a point that won't split the line - pt extends beyond the line
//
var pointAfterLine = MapPointBuilderEx.CreateMapPoint(50, 1, 10);
splitPolyline = GeometryEngine.Instance.SplitAtPoint(polylineZ, pointAfterLine, false, false, out splitOccurred, out partIndex, out segmentIndex);
// splitOccurred = false
// ignore partIndex, sgementIndex
// splitPolyline is the same as polylineZ
///
/// multipart polygon
///
List<Coordinate3D> coordsZ =
[
new Coordinate3D(10,10,5),
new Coordinate3D(10,20,5),
new Coordinate3D(20,20,5),
new Coordinate3D(20,10,5)
];
List<Coordinate3D> coordsZ_2ndPart =
[
new Coordinate3D(30,20,10),
new Coordinate3D(30,30,10),
new Coordinate3D(35,28,10),
new Coordinate3D(40,30,10),
new Coordinate3D(40,20,10)
];
var builder = new PolygonBuilderEx
{
HasZ = true
};
builder.AddPart(coordsZ);
builder.AddPart(coordsZ_2ndPart);
Polygon multipart = builder.ToGeometry();
// pointA is closer to the first part of the multipart - the split occurs in the first part
var pointA = MapPointBuilderEx.CreateMapPoint(22, 18, 7);
var splitPolygon = GeometryEngine.Instance.SplitAtPoint(multipart, pointA, false, false, out splitOccurred, out partIndex, out segmentIndex);
// splitPolygon.PointCount = 12
// splitPolygon.PartCount = 2
// splitPolygon first part coordinates (10, 10, 5), (10, 20, 5), (20, 20, 5), (22, 18, 7), (20, 10, 5), (10, 10, 5)
// pointB is midPoint between the 2 parts - no split will occur
var pointB = MapPointBuilderEx.CreateMapPoint(25, 20, 7);
splitPolygon = GeometryEngine.Instance.SplitAtPoint(multipart, pointB, true, false, out splitOccurred, out partIndex, out segmentIndex);
// splitOccurred = false
// ignore partIndex, sgementIndex
// splitPolyline is the same as polylineZ// two disjoint polygons
Envelope env = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(4.0, 4.0), MapPointBuilderEx.CreateMapPoint(8, 8));
Polygon poly1 = PolygonBuilderEx.CreatePolygon(env);
Envelope env2 = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(5, 5));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env2);
bool touches = GeometryEngine.Instance.Touches(poly1, poly2); // touches = false
// another polygon that touches the first
Envelope env3 = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(1.0, 1.0), MapPointBuilderEx.CreateMapPoint(4, 4));
Polygon poly3 = PolygonBuilderEx.CreatePolygon(env3);
touches = GeometryEngine.Instance.Touches(poly1, poly3); // touches = true// Not all of the input points are transformed as some of them are outside of the GCS horizon.
Coordinate2D[] inCoords2D =
[
new Coordinate2D(-1, -1),
new Coordinate2D(-2, -5),
new Coordinate2D(-5, -11),
new Coordinate2D(-10, -19),
new Coordinate2D(-17, -29),
new Coordinate2D(-26, -41),
new Coordinate2D(-37, -5),
new Coordinate2D(-50, -21),
new Coordinate2D(-65, -39),
new Coordinate2D(-82, -9)
];
int arraySize = inCoords2D.Length;
ProjectionTransformation projTrans = ProjectionTransformation.Create(SpatialReferences.WGS84, SpatialReferenceBuilder.CreateSpatialReference(24891));
Coordinate2D[] outCoords2D = new Coordinate2D[arraySize];
// transform and choose to remove the clipped coordinates
int numPointsTransformed = GeometryEngine.Instance.Transform2D(inCoords2D, projTrans, ref outCoords2D, true);
// numPointsTransformed = 4
// outCoords2D.Length = 4
// outCoords2D[0] = {5580417.6876455201, 1328841.2376554986}
// outCoords2D[1] = {3508774.290814558, -568027.23444226268}
// outCoords2D[2] = {1568096.0886155984, -2343435.4394415971}
// outCoords2D[3] = {57325.827391741652, 1095146.8917508761}
// transform and don't remove the clipped coordinates
numPointsTransformed = GeometryEngine.Instance.Transform2D(inCoords2D, projTrans, ref outCoords2D, false);
// numPointsTransformed = 4
// outCoords2D.Length = 10
// outCoords2D[0] = {double.Nan, double.Nan}
// outCoords2D[1] = {double.Nan, double.Nan}
// outCoords2D[2] = {double.Nan, double.Nan}
// outCoords2D[3] = {double.Nan, double.Nan}
// outCoords2D[4] = {double.Nan, double.Nan}
// outCoords2D[5] = {double.Nan, double.Nan}
// outCoords2D[6] = {5580417.6876455201, 1328841.2376554986}
// outCoords2D[7] = {3508774.290814558, -568027.23444226268}
// outCoords2D[8] = {1568096.0886155984, -2343435.4394415971}
// outCoords2D[9] = {57325.827391741652, 1095146.8917508761}// Not all of the input points are transformed as some of them are outside of the GCS horizon.
Coordinate3D[] inCoords3D =
[
new Coordinate3D(-1, -1, 0),
new Coordinate3D(-2, -5, 1),
new Coordinate3D(-5, -11, 2),
new Coordinate3D(-10, -19, 3),
new Coordinate3D(-17, -29, 4),
new Coordinate3D(-26, -41, 5),
new Coordinate3D(-37, -5, 6),
new Coordinate3D(-50, -21, 7),
new Coordinate3D(-65, -39, 8),
new Coordinate3D(-82, -9, 9)
];
int arraySize = inCoords3D.Length;
ProjectionTransformation projTrans = ProjectionTransformation.Create(SpatialReferences.WGS84, SpatialReferenceBuilder.CreateSpatialReference(24891));
Coordinate3D[] outCoords3D = new Coordinate3D[arraySize];
// transform and choose to remove the clipped coordinates
int numPointsTransformed = GeometryEngine.Instance.Transform3D(inCoords3D, projTrans, ref outCoords3D);
// numPointsTransformed = 4
// outCoords2D.Length = 4
// outCoords2D[0] = {5580417.6876455201, 1328841.2376554986, 7}
// outCoords2D[1] = {3508774.290814558, -568027.23444226268, 8}
// outCoords2D[2] = {1568096.0886155984, -2343435.4394415971, 9}
// outCoords2D[3] = {57325.827391741652, 1095146.8917508761, 10}MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1.0, 1.0);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(2.0, 2.5);
Geometry geometry = GeometryEngine.Instance.Union(pt1, pt2);
Multipoint multipoint = geometry as Multipoint; // multipoint has point count of 2// union two polygons
List<MapPoint> polyPts =
[
MapPointBuilderEx.CreateMapPoint(3.0, 2.0),
MapPointBuilderEx.CreateMapPoint(3.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 6.0),
MapPointBuilderEx.CreateMapPoint(6.0, 2.0),
];
Polygon poly1 = PolygonBuilderEx.CreatePolygon(polyPts);
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(poly1);
Envelope env = EnvelopeBuilderEx.CreateEnvelope(MapPointBuilderEx.CreateMapPoint(4.0, 4.0), MapPointBuilderEx.CreateMapPoint(8, 8));
Polygon poly2 = PolygonBuilderEx.CreatePolygon(env);
isSimple = GeometryEngine.Instance.IsSimpleAsFeature(poly2);
Geometry g = GeometryEngine.Instance.Union(poly1, poly2);
Polygon polyResult = g as Polygon;// union many polylines
List<Coordinate2D> coords =
[
new Coordinate2D(1, 2), new Coordinate2D(3, 4), new Coordinate2D(4, 2),
new Coordinate2D(5, 6), new Coordinate2D(7, 8), new Coordinate2D(8, 4),
new Coordinate2D(9, 10), new Coordinate2D(11, 12), new Coordinate2D(12, 8),
new Coordinate2D(10, 8), new Coordinate2D(12, 12), new Coordinate2D(14, 10)
];
// create Disjoint lines
List<Polyline> manyLines =
[
PolylineBuilderEx.CreatePolyline([coords[0], coords[1], coords[2]], SpatialReferences.WGS84),
PolylineBuilderEx.CreatePolyline([coords[3], coords[4], coords[5]]),
PolylineBuilderEx.CreatePolyline([coords[6], coords[7], coords[8]])
];
polyline = GeometryEngine.Instance.Union(manyLines) as Polyline;// union many polygons
List<Coordinate3D> coordsZ =
[
new Coordinate3D(1, 2, 0), new Coordinate3D(3, 4, 1), new Coordinate3D(4, 2, 2),
new Coordinate3D(5, 6, 3), new Coordinate3D(7, 8, 4), new Coordinate3D(8, 4, 5),
new Coordinate3D(9, 10, 6), new Coordinate3D(11, 12, 7), new Coordinate3D(12, 8, 8),
new Coordinate3D(10, 8, 9), new Coordinate3D(12, 12, 10), new Coordinate3D(14, 10, 11)
];
// create polygons
List<Polygon> manyPolygonsZ =
[
PolygonBuilderEx.CreatePolygon([coordsZ[0], coordsZ[1], coordsZ[2]], SpatialReferences.WGS84),
PolygonBuilderEx.CreatePolygon([coordsZ[3], coordsZ[4], coordsZ[5]]),
PolygonBuilderEx.CreatePolygon([coordsZ[6], coordsZ[7], coordsZ[8]])
];
polygon = GeometryEngine.Instance.Union(manyPolygonsZ) as Polygon;// generalize with a maxDeviation of 0
Polyline weedPolyline = GeometryEngine.Instance.Weed(polyline, 0) as Polyline;
// generalize with a maxDeviation < 0
weedPolyline = GeometryEngine.Instance.Weed(polyline, -1000000) as Polyline;
// generalize with a maxDeviation > 0
weedPolyline = GeometryEngine.Instance.Weed(polyline, 1000000) as Polyline;// build a polygon
List<MapPoint> pts =
[
MapPointBuilderEx.CreateMapPoint(1.0, 1.0),
MapPointBuilderEx.CreateMapPoint(1.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 2.0),
MapPointBuilderEx.CreateMapPoint(2.0, 1.0),
];
Polygon poly = PolygonBuilderEx.CreatePolygon(pts);
// an inner point
MapPoint innerPt = MapPointBuilderEx.CreateMapPoint(1.5, 1.5);
bool within = GeometryEngine.Instance.Within(innerPt, poly); // within = true
// point on a boundary
within = GeometryEngine.Instance.Within(pts[0], poly); // within = false
// an interior line
MapPoint innerPt2 = MapPointBuilderEx.CreateMapPoint(1.25, 1.75);
List<MapPoint> innerLinePts = [innerPt, innerPt2];
polyline = PolylineBuilderEx.CreatePolyline(innerLinePts);
within = GeometryEngine.Instance.Within(polyline, poly); // within = true
// a line that crosses the boundary
MapPoint outerPt = MapPointBuilderEx.CreateMapPoint(3, 1.5);
List<MapPoint> crossingLinePts = [innerPt, outerPt];
polyline = PolylineBuilderEx.CreatePolyline(crossingLinePts);
within = GeometryEngine.Instance.Within(polyline, poly); // within = false
// polygon in polygon
Envelope env = EnvelopeBuilderEx.CreateEnvelope(innerPt, innerPt2);
within = GeometryEngine.Instance.Within(env, poly); // within = true 