Leaflet JSON Layer

Simple way for transform any JSON data source in a Leaflet Layer!

A Dynamic Leaflet Layer that load JSON data in layer in the form of markers with attributes

and minimize remote requests with caching system

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Tested in Leaflet 0.7 and 1.1

Options

Option	Data	Description
url	String	remote url
jsonpParam	String	callback parameter name for jsonp request append to url
jsonpParam	String	callback parameter name for jsonp request append to url
callData	Function	custom function for data source, params: (req: url
Filtering
propertyItems	String	json property used contains data items
propertyLoc	String	json property used as Latlng of marker, if is array: ['lat','lon'] select double fields
locAsGeoJSON	String	interpret location data as [lon, lat] value pair instead of [lat, lon]
propertyTitle	String	json property used as title in marker
filterData	Function	function for pre-filter data
Rendering
dataToMarker	Function	function that will be used for creating markers from json points
layerTarget	L.Layer	pre-existing layer to add markers(L.LayerGroup, L.MarkerClusterGroup)
buildPopup	Function	function popup builder
optsPopup	String	popup options
buildIcon	Function	function icon builder
Caching
minZoom	Number	min zoom for call data
caching	Boolean	remote requests caching
cacheId	Function	function to generate id used to uniquely identify data items in cache
minShift	Number	min shift for update data(in meters)
precision	Number	number of digit send to server for lat,lng precision
updateOutBounds	String	request new data only if current bounds higher than last bounds
updateMarkers	Boolean	update all markers in map to last results of callData

Event	Data	Description
'dataloading'	{req: url	bbox}
'dataloaded'	{data: json}	fired on ajax/jsonp request success

var l = new L.LayerJSON({url: "search.php?lat1={lat1}&lat2={lat2}&lon1={lon1}&lon2={lon2}" });
map.addLayer(l);

Demos:

https://opengeo.tech/maps/leaflet-layerjson

Source:

Github

This plugin support Grunt for building process. Therefore the deployment require NPM installed in your system.

After you've made sure to have npm working, run this in command line:

npm install
grunt