Currently, I am in possession of two geoJSON feature collections that require integration into the map. Additionally, I desire for these features to be easily toggled on and off through the layer visibility controllers, similar to the demonstration provided at http://leafletjs.com/examples/layers-control.html.
What steps should I take to accomplish this task effectively?
If you're looking for a helpful tutorial on how to use L.GeoJSON, Leaflet's GeoJSON layer, look no further! You can find a great guide here: http://leafletjs.com/examples/geojson.html. Additionally, for more information on L.GeoJSON, check out the reference link here: http://leafletjs.com/reference.html#geojson. I see you've also discovered the tutorial for L.control.layers; here is the reference for that as well: http://leafletjs.com/reference.html#control-layers
It's actually quite straightforward to implement. Just create a layer control, load a GeoJSON file into your script using any XHR library you prefer, utilize the retrieved data to define a L.GeoJSON layer, and then add it to the layer control. Here's an example in code:
// Create the layer control and add it to the map
var controlLayers = L.control.layers().addTo(map);
// Load a GeoJSON file (using jQuery's $.getJSON)
$.getJSON('/my-folder/my-file.json', function (data) {
// Use the data to create a GeoJSON layer and add it to the map
var geojsonLayer = L.geoJson(data).addTo(map);
// Add the GeoJSON layer to the layer control
controlLayers.addOverlay(geojsonLayer, 'My GeoJSON layer title');
});
For a live demonstration, check out this Plunker example: http://plnkr.co/edit/tFVrrq?p=preview
When you load a GeoJSON file and create a layer, you have the option to include it in the layer control as an Overlay Layer. You can easily do this by adapting the example provided and substituting the cities layer with your own.
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