Example of a Mapbox vector tiles map with custom tile grid.
A vector tiles map which reuses the same tiles for subsequent zoom levels to save bandwith on mobile devices. Note: No map will be visible when the access token has expired.
<!DOCTYPE html>
<html>
<head>
<title>Advanced Mapbox Vector Tiles</title>
<link rel="stylesheet" href="https://openlayers.org/en/v3.20.0/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v3.20.0/build/ol.js"></script>
<script src="https://openlayers.org/en/v3.20.0/examples/resources/mapbox-streets-v6-style.js"></script>
<style>
.map {
background: #f8f4f0;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script>
/* eslint-disable openlayers-internal/no-unused-requires */
var key = 'Your Mapbox access token from http://mapbox.com/ here';
// For how many zoom levels do we want to use the same vector tiles?
// 1 means "use tiles from all zoom levels". 2 means "use the same tiles for 2
// subsequent zoom levels".
var reuseZoomLevels = 2;
// Offset of loaded tiles from web mercator zoom level 0.
// 0 means "At map zoom level 0, use tiles from zoom level 0". 1 means "At map
// zoom level 0, use tiles from zoom level 1".
var zoomOffset = 1;
// Calculation of tile urls
var resolutions = [];
for (var z = zoomOffset / reuseZoomLevels; z <= 22 / reuseZoomLevels; ++z) {
resolutions.push(156543.03392804097 / Math.pow(2, z * reuseZoomLevels));
}
function tileUrlFunction(tileCoord) {
return ('https://{a-d}.tiles.mapbox.com/v4/mapbox.mapbox-streets-v6/' +
'{z}/{x}/{y}.vector.pbf?access_token=' + key)
.replace('{z}', String(tileCoord[0] * reuseZoomLevels + zoomOffset))
.replace('{x}', String(tileCoord[1]))
.replace('{y}', String(-tileCoord[2] - 1))
.replace('{a-d}', 'abcd'.substr(
((tileCoord[1] << tileCoord[0]) + tileCoord[2]) % 4, 1));
}
var map = new ol.Map({
layers: [
new ol.layer.VectorTile({
renderMode: 'vector',
preload: Infinity,
source: new ol.source.VectorTile({
attributions: '© <a href="https://www.mapbox.com/map-feedback/">Mapbox</a> ' +
'© <a href="https://www.openstreetmap.org/copyright">' +
'OpenStreetMap contributors</a>',
format: new ol.format.MVT(),
tileGrid: new ol.tilegrid.TileGrid({
extent: ol.proj.get('EPSG:3857').getExtent(),
resolutions: resolutions
}),
tilePixelRatio: 16,
tileUrlFunction: tileUrlFunction
}),
style: createMapboxStreetsV6Style()
})
],
target: 'map',
view: new ol.View({
center: [0, 0],
minZoom: 1,
zoom: 2
})
});
// ol.style.Fill, ol.style.Icon, ol.style.Stroke, ol.style.Style and
// ol.style.Text are required for createMapboxStreetsV6Style()
</script>
</body>
</html>