mirror of
https://github.com/protomaps/PMTiles.git
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89 lines
3.1 KiB
HTML
89 lines
3.1 KiB
HTML
<html>
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<head>
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<title>PMTiles OpenLayers Example</title>
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<meta charset="utf-8"/>
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<script src="https://cdn.jsdelivr.net/npm/ol@v7.1.0/dist/ol.js"></script>
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v7.1.0/ol.css">
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<script src="https://unpkg.com/pmtiles@2.4.0/dist/index.js"></script>
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<style>
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body, #map {
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height:100vh;
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margin: 0;
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}
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</style>
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</head>
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<body>
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<div id="map"></div>
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<script type="text/javascript">
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class OLPMTilesSource {
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constructor(url) {
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this._url = url;
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this._p = new pmtiles.PMTiles(url)
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}
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url = () => {
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return "pmtiles://" + this._url + "/{z}/{x}/{y}";
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}
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tileLoadFunction = (tile,url) => {
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// the URL construction is done internally by OL, so we need to parse it
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// back out here using a hacky regex
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const re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/);
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const result = url.match(re);
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const z = +result[2];
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const x = +result[3];
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const y = +result[4];
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tile.setLoader((extent, resolution, projection) => {
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this._p.getZxy(z,x,y).then((result) => {
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if (result) {
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const format = tile.getFormat();
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const features = format.readFeatures(result.data.buffer, {
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extent: extent,
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featureProjection: projection
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});
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tile.setFeatures(features);
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}
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});
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});
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}
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}
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const source = new OLPMTilesSource("https://pub-9288c68512ed46eca46ddcade307709b.r2.dev/us-west/nz-buildings-v3.pmtiles");
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const country = new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: 'gray',
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width: 1,
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}),
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fill: new ol.style.Fill({
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color: 'rgba(20,20,20,0.9)',
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}),
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});
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const vtLayer = new ol.layer.VectorTile({
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declutter: true,
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source: new ol.source.VectorTile({
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attributions:["© Land Information New Zealand"],
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maxZoom: 15, // this could come from the PMTiles header (async)
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format: new ol.format.MVT(), // this could come from the PMTiles header (async)
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url:source.url(),
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tileLoadFunction: source.tileLoadFunction
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}),
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style: country,
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});
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ol.proj.useGeographic();
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const map = new ol.Map({
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layers: [vtLayer],
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target: 'map',
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view: new ol.View({
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center: [172.606201,-43.556510],
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zoom: 7,
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multiWorld: true,
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}),
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});
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</script>
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</body>
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</html>
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