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| <html>
<head>
<meta charset='utf-8' />
<title>FOAM API Example</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src="https://unpkg.com/latlon-geohash@^1.1.0/latlon-geohash.js"></script>
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.1.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.1.0/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 = '<mapbox-access-token>'; // Replace with your Mapbox access token
// Map
const BOUNDING_BOX = [
[-73.92, 40.74],
[-74.03, 40.78]
];
const INITIAL_ZOOM = 16
// Icons
/* Emojis via https://twemoji.twitter.com/
* Copyright 2019 Twitter, Inc and other contributors
* Graphics licensed under CC-BY 4.0: https://creativecommons.org/licenses/by/4.0/
*/
const icons = [{
"name": "application",
"state": "application",
"url": "https://twemoji.maxcdn.com/2/72x72/1f6a9.png"
},{
"name": "listing",
"state": "listing",
"url": "https://twemoji.maxcdn.com/2/72x72/1f6a9.png"
}]
var map = new mapboxgl.Map({
style: 'mapbox://styles/mapbox/light-v10',
center: getMapCenter(BOUNDING_BOX),
zoom: INITIAL_ZOOM,
pitch: 45,
bearing: -17.6,
container: 'map'
});
// Functions
function getMapCenter(bounding_box) {
return [(bounding_box[0][0] + bounding_box[1][0]) / 2, (bounding_box[0][1] + bounding_box[1][1]) / 2];
}
function getPointCoords(geohash) {
const coords = Geohash.decode(geohash);
return [coords['lon'], coords['lat']];
}
function addLayer(icon, bounding_box) {
const state = icon['state']
fetch('https://map-api-direct.foam.space/poi/filtered?swLng=' + bounding_box[0][0] + '&swLat=' + bounding_box[0][1] + '&neLng=' + BOUNDING_BOX[1][0] + '&neLat=' + bounding_box[1][1] + '&status=' + icon['state'] + '&sort=most_value&limit=100&offset=0')
.then(result => result.json())
.then(json => {
const featureCollection = json.map(function(record) {
const feature = {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": getPointCoords(record.geohash)
}
}
return feature;
});
const geojson = {
"type": "geojson",
"data": {
"type": "FeatureCollection",
"features": featureCollection
}
};
map.addLayer({
"id": icon['name'],
"type": "symbol",
"source": geojson,
"layout": {
"icon-image": icon['name'],
"icon-allow-overlap": true,
"icon-size": 0.5,
}
});
});
}
// The 'building' layer in the mapbox-streets vector source contains building-height
// data from OpenStreetMap.
map.on('load', function() {
// Insert the layer beneath any symbol layer.
var layers = map.getStyle().layers;
var labelLayerId;
for (var i = 0; i < layers.length; i++) {
if (layers[i].type === 'symbol' && layers[i].layout['text-field']) {
labelLayerId = layers[i].id;
break;
}
}
map.addLayer({
'id': '3d-buildings',
'source': 'composite',
'source-layer': 'building',
'filter': ['==', 'extrude', 'true'],
'type': 'fill-extrusion',
'minzoom': 15,
'paint': {
'fill-extrusion-color': '#aaa',
// use an 'interpolate' expression to add a smooth transition effect to the
// buildings as the user zooms in
'fill-extrusion-height': [
"interpolate", ["linear"], ["zoom"],
15, 0,
15.05, ["get", "height"]
],
'fill-extrusion-base': [
"interpolate", ["linear"], ["zoom"],
15, 0,
15.05, ["get", "min_height"]
],
'fill-extrusion-opacity': .6
}
}, labelLayerId);
// Load icons
icons.forEach(function(icon) {
map.loadImage(icon['url'], function(error, image) {
if (error) throw error;
map.addImage(icon['name'], image);
addLayer(icon, BOUNDING_BOX);
})
});
});
</script>
</body>
</html>
|