I am new to leaflet and JavaScript. I was thinking I could use geocommons and GeoJSON to host data for a mapping project.
I found External GeoJSON and Leaflet: The Other Way(s). This tutorial on reading external GeoJSON using a leaflet plugin but I haven't been able to get it to get the points to render on my map. The map portion of the code renders fine but the GeoJSON won't appear.
var geojsonLayer = new L.GeoJSON.AJAX("http://geocommons.com/datasets/168923/features.json?lat=53.796&lon=-1.551&radius=3&callback=?", {onEachFeature:popUp});
function popUp(feature, layer) {
layer.bindPopup(feature.properties.name);
}
geojsonLayer.addTo(myMap);
geraldarthur
Save the leaflet.ajax plugin as leaflet.ajax.min.js in the same folder as your html page, then call it by adding this line in between the <head> tags
<script src="leaflet.ajax.min"></script>
来源：https://stackoverflow.com/questions/20485723/add-external-geojson-to-leaflet-layer