From c1ab4aa4923deb5632762a8ab0208e6af328513d Mon Sep 17 00:00:00 2001
From: Christopher Caldwell <c.caldwell90@gmail.com>
Date: Mon, 10 Oct 2022 12:25:40 -0400
Subject: [PATCH] fix for cached geometry error

---
 README.md                   |  4 ++++
 lib/tiles/features/index.ts | 23 +++++++++++------------
 package.json                |  2 +-
 3 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/README.md b/README.md
index df13adbf..caa2820f 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,10 @@ The GeoPackage JavaScript library currently provides the ability to read GeoPack
 
 ### Changelog
 
+##### 4.2.3
+
+- fix cached geometry error
+
 ##### 4.2.2
 
 - fix simplify error
diff --git a/lib/tiles/features/index.ts b/lib/tiles/features/index.ts
index 20150b4b..bbe19a2d 100644
--- a/lib/tiles/features/index.ts
+++ b/lib/tiles/features/index.ts
@@ -748,20 +748,19 @@ export class FeatureTiles {
 
   /**
    * Simplify x,y tile coordinates by 1 pixel
-   * @param lineString GeoJSON with coordinates in pixels
+   * @param coordinatesArray GeoJSON with coordinates in pixels
    * @param isPolygon determines if the first and last point need to stay connected
    * @return simplified GeoJSON
    * @since 2.0.0
    */
-  simplifyPoints(lineString: any, isPolygon = false): any | null {
-    lineString.coordinates = simplify(
-      lineString.coordinates.map(coordinate => {
+  simplifyPoints(coordinatesArray: any, isPolygon = false): any | null {
+    return simplify(
+      coordinatesArray.map(coordinate => {
         return { x: coordinate[0], y: coordinate[1] };
       }),
       this.simplifyToleranceInPixels,
       false,
     ).map(point => [point.x, point.y]);
-    return lineString;
   }
 
   /**
@@ -773,18 +772,18 @@ export class FeatureTiles {
    * @param transform
    */
   getPath(lineString: any, context: any, boundingBox: BoundingBox, isPolygon = false, transform: Function): void {
-    lineString.coordinates = lineString.coordinates.map(coordinate => {
-      const transformedCoordinate = transform(coordinate);
+    const line = lineString.coordinates.map(coordinate => {
+      const transformedCoordinate = transform(coordinate.slice());
       return [
         TileBoundingBoxUtils.getXPixel(this.tileWidth, boundingBox, transformedCoordinate[0]),
         TileBoundingBoxUtils.getYPixel(this.tileHeight, boundingBox, transformedCoordinate[1]),
       ];
     });
-    const simplifiedLineString = this.simplifyGeometries ? this.simplifyPoints(lineString, isPolygon) : lineString;
-    if (simplifiedLineString.coordinates.length > 1) {
-      context.moveTo(simplifiedLineString.coordinates[0][0], simplifiedLineString.coordinates[0][1]);
-      for (let i = 1; i < simplifiedLineString.coordinates.length; i++) {
-        context.lineTo(simplifiedLineString.coordinates[i][0], simplifiedLineString.coordinates[i][1]);
+    const simplifiedLineString = this.simplifyGeometries ? this.simplifyPoints(line, isPolygon) : line;
+    if (simplifiedLineString.length > 1) {
+      context.moveTo(simplifiedLineString[0][0], simplifiedLineString[0][1]);
+      for (let i = 1; i < simplifiedLineString.length; i++) {
+        context.lineTo(simplifiedLineString[i][0], simplifiedLineString[i][1]);
       }
     }
   }
diff --git a/package.json b/package.json
index 14593ad2..3dd51f4b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ngageoint/geopackage",
-  "version": "4.2.2",
+  "version": "4.2.3",
   "description": "GeoPackage JavaScript Library",
   "keywords": [
     "NGA",