dds example

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title></title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.18.0/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.18.0/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<div id='map'></div>
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoicGV0ZXJxbGl1IiwiYSI6ImpvZmV0UEEifQ._D4bRmVcGfJvo1wjuOpA1g';
var map = new mapboxgl.Map({
    container: 'map', // container id
    style: 'mapbox://styles/peterqliu/ciog5bh8h0009a8m2oewpegt2', //stylesheet location
    center: [-74.50, 40], // starting position
    zoom: 0 // starting zoom
});

mapboxgl.util.getJSON('https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_month.geojson', function(err,json){
    console.log(json)
    map.on('load', function(err, resp){
        map.addSource('quakes', {
            type: 'geojson',
            data: {
                "type": "FeatureCollection",
                "features": []
            }
        })
        .addLayer({
            "id": "quake",
            "type": "circle",
            "source": "quakes",
            "layout": {
            },
            "paint": {
                "circle-color": "blue",
                "circle-opacity":0.1,
                'circle-radius': {
                    'property': 'mag',
                    'stops': [
                        [0, 0],
                        [6, 12]
                    ]
                }
            }
        });
        map.getSource('quakes').setData(json);
    })
})
</script>

</body>
</html>

https://api.tiles.mapbox.com/mapbox-gl-js/v0.18.0/mapbox-gl.js