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vector.html
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vector.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Display a map</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-gl.js"></script>
<link href="https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-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>
var map = new maplibregl.Map({
container: 'map', // container id
style: 'https://demotiles.maplibre.org/style.json', // style URL
center: [0, 0], // starting position [lng, lat]
zoom: 1, // starting zoom
hash: 'map'
});
function _arrayBufferToBase64(buffer) {
var binary = '';
var bytes = new Uint8Array(buffer);
var len = bytes.byteLength;
for (var i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return window.btoa(binary);
}
maplibregl.addProtocol('custom', (params, callback) => {
fetch(`http://localhost:3000/0.pbf`)
.then(t => {
console.log(params)
if (t.status == 200) {
t.arrayBuffer().then(arr => {
console.log(_arrayBufferToBase64(arr));
callback(null, arr, null, null);
});
} else {
callback(new Error(`Tile fetch error: ${t.statusText}`));
}
})
.catch(e => {
callback(new Error(e));
});
return { cancel: () => { } };
});
map.on('load', function () {
map.addSource('custom', {
'type': 'vector',
'tiles': ['custom://{z}/{x}/{y}.pbf']
});
map.addLayer({
'id': 'lines',
'type': 'line',
'source': 'custom',
'source-layer': 'lines',
'paint': {
'line-width': [
'case',
['==', ['get', 'width'], 'wide'],
2,
1
],
'line-color': 'white'
}
})
});
</script>
</body>
</html>