index_backup.html


<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title>SF Parks</title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.11.0/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.11.0/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.eyJ1IjoianN0cmF0bWFuIiwiYSI6IlpVUTZSXzgifQ.hxmNOg44oouXakZyJQZX7Q';
var map = new mapboxgl.Map({
    container: 'map', // container id
    style: 'mapbox://styles/jstratman/cienatk1p08cfsmkmkgtsjhln', //stylesheet location
    center: [-122.430, 37.747], // starting position
    zoom: 11 // starting zoom
});

map.on('style.load', function () {

    // add geojson data as a new source
    map.addSource("symbols", {
        "type": "geojson",
        "data": {
            "type": "FeatureCollection",
            "features": [
                {
                    "type": "Feature",
                    "properties": {},
                    "geometry": {
                        "type": "Point",
                        "coordinates": [
                            -122.362, 37.735

                        ]
                    }
                },
                {
                    "type": "Feature",
                    "properties": {},
                    "geometry": {
                        "type": "Point",
                        "coordinates": [
                            -122.425, 37.763
                        ]
                    }
                },
                {
                    "type": "Feature",
                    "properties": {},
                    "geometry": {
                        "type": "Point",
                        "coordinates": [
                            -122.399, 37.797
                        ]
                    }
                }
            ]
        }
    });

    // add source as a layer and apply some styles
    map.addLayer({
        "id": "symbols",
        "interactive": true,
        "type": "symbol",
        "source": "symbols",
        "layout": {
            "icon-image": "default_marker"
        },
        "paint": {}
    });
});

map.on('click', function (e) {
    // Use featresAt to get features within a given radius of the click event
    // Use layer option to avoid getting results from other layers
    map.featuresAt(e.point, {layer: 'symbols', radius: 10, includeGeometry: true}, function (err, features) {
        if (err) throw err;
        // if there are features within the given radius of the click event,
        // fly to the location of the click event
        if (features.length) {
            // Get coordinates from the symbol and center the map on those coordinates
            map.flyTo({center: features[0].geometry.coordinates});
        }
    });
});


// Use the same approach as above to indicate that the symbols are clickable
// by changing the cursor style to 'pointer'.
map.on('mousemove', function (e) {
    map.featuresAt(e.point, {layer: 'symbols', radius: 10}, function (err, features) {
        if (err) throw err;
        map.getCanvas().style.cursor = features.length ? "pointer" : "";
    });
});

</script>

</body>
</html>