Create a Heatmap layer on a globe with terrain elevation
Create a Heatmap layer on a globe with terrain elevation.
import * as maplibregl from 'https://unpkg.com/maplibre-gl@6.2.0/dist/maplibre-gl.mjs';
const map = new maplibregl.Map({
container: 'map',
maxPitch: 95,
center: [-120, 37.422],
zoom: 7.25,
bearing: 57,
pitch: 71,
hash: true
});
map.setStyle('https://tiles.openfreemap.org/styles/liberty', {
transformStyle: (previousStyle, nextStyle) => {
nextStyle.projection = { type: 'globe' };
nextStyle.sources = {
...nextStyle.sources, terrainSource: {
type: 'raster-dem',
url: 'https://tiles.mapterhorn.com/tilejson.json'
},
hillshadeSource: {
type: 'raster-dem',
url: 'https://tiles.mapterhorn.com/tilejson.json'
}
}
nextStyle.terrain = {
source: 'terrainSource',
exaggeration: 1
}
nextStyle.sky = {
'atmosphere-blend': [
'interpolate',
['linear'],
['zoom'],
0, 1,
2, 0
],
}
nextStyle.layers.push({
id: 'hills',
type: 'hillshade',
source: 'hillshadeSource',
layout: { visibility: 'visible' },
paint: { 'hillshade-shadow-color': '#473B24' }
})
return nextStyle
}
})
map.addControl(
new maplibregl.NavigationControl({
visualizePitch: true,
showZoom: true,
showCompass: true
})
);
map.addControl(
new maplibregl.GlobeControl()
);
map.addControl(
new maplibregl.TerrainControl({
source: 'terrainSource',
exaggeration: 1
})
);
map.on('load', () => {
// Add a geojson point source.
// Heatmap layers also work with a vector tile source.
map.addSource('earthquakes', {
'type': 'geojson',
'data':
'https://maplibre.org/maplibre-gl-js/docs/assets/earthquakes.geojson'
});
map.addLayer(
{
'id': 'earthquakes-heat',
'type': 'heatmap',
'source': 'earthquakes',
'maxzoom': 9,
'paint': {
// Increase the heatmap weight based on frequency and property magnitude
'heatmap-weight': [
'interpolate',
['linear'],
['get', 'mag'],
0,
0,
6,
1
],
// Increase the heatmap color weight weight by zoom level
// heatmap-intensity is a multiplier on top of heatmap-weight
'heatmap-intensity': [
'interpolate',
['linear'],
['zoom'],
0,
1,
9,
3
],
// Color ramp for heatmap. Domain is 0 (low) to 1 (high).
// Begin color ramp at 0-stop with a 0-transparency color
// to create a blur-like effect.
'heatmap-color': [
'interpolate',
['linear'],
['heatmap-density'],
0,
'rgba(33,102,172,0)',
0.2,
'rgb(103,169,207)',
0.4,
'rgb(209,229,240)',
0.6,
'rgb(253,219,199)',
0.8,
'rgb(239,138,98)',
1,
'rgb(178,24,43)'
],
// Adjust the heatmap radius by zoom level
'heatmap-radius': [
'interpolate',
['linear'],
['zoom'],
0,
2,
9,
20
],
// Transition from heatmap to circle layer by zoom level
'heatmap-opacity': [
'interpolate',
['linear'],
['zoom'],
7,
1,
9,
0
]
}
}
);
map.addLayer(
{
'id': 'earthquakes-point',
'type': 'circle',
'source': 'earthquakes',
'minzoom': 7,
'paint': {
// Size circle radius by earthquake magnitude and zoom level
'circle-radius': [
'interpolate',
['linear'],
['zoom'],
7,
['interpolate', ['linear'], ['get', 'mag'], 1, 1, 6, 4],
16,
['interpolate', ['linear'], ['get', 'mag'], 1, 5, 6, 50]
],
'circle-color': [
'interpolate',
['linear'],
['get', 'mag'],
1,
'rgba(33,102,172,0)',
2,
'rgb(103,169,207)',
3,
'rgb(209,229,240)',
4,
'rgb(253,219,199)',
5,
'rgb(239,138,98)',
6,
'rgb(178,24,43)'
],
'circle-stroke-color': 'white',
'circle-stroke-width': 1,
// Transition from heatmap to circle layer by zoom level
'circle-opacity': [
'interpolate',
['linear'],
['zoom'],
7,
0,
8,
1
]
}
}
);
});
<!DOCTYPE html>
<html lang="en">
<head>
<title>Create a Heatmap layer on a globe with terrain elevation</title>
<meta property="og:description" content="Create a Heatmap layer on a globe with terrain elevation." />
<meta property="og:category" content="Globe" />
<meta property="og:created" content="2025-06-25" />
<meta charset='utf-8'>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel='stylesheet' href='https://unpkg.com/maplibre-gl@6.2.0/dist/maplibre-gl.css' />
<style>
body {
margin: 0;
padding: 0;
}
html,
body,
#map {
height: 100%;
}
</style>
</head>
<body>
<div id="map"></div>
<script type="module">
import * as maplibregl from 'https://unpkg.com/maplibre-gl@6.2.0/dist/maplibre-gl.mjs';
const map = new maplibregl.Map({
container: 'map',
maxPitch: 95,
center: [-120, 37.422],
zoom: 7.25,
bearing: 57,
pitch: 71,
hash: true
});
map.setStyle('https://tiles.openfreemap.org/styles/liberty', {
transformStyle: (previousStyle, nextStyle) => {
nextStyle.projection = { type: 'globe' };
nextStyle.sources = {
...nextStyle.sources, terrainSource: {
type: 'raster-dem',
url: 'https://tiles.mapterhorn.com/tilejson.json'
},
hillshadeSource: {
type: 'raster-dem',
url: 'https://tiles.mapterhorn.com/tilejson.json'
}
}
nextStyle.terrain = {
source: 'terrainSource',
exaggeration: 1
}
nextStyle.sky = {
'atmosphere-blend': [
'interpolate',
['linear'],
['zoom'],
0, 1,
2, 0
],
}
nextStyle.layers.push({
id: 'hills',
type: 'hillshade',
source: 'hillshadeSource',
layout: { visibility: 'visible' },
paint: { 'hillshade-shadow-color': '#473B24' }
})
return nextStyle
}
})
map.addControl(
new maplibregl.NavigationControl({
visualizePitch: true,
showZoom: true,
showCompass: true
})
);
map.addControl(
new maplibregl.GlobeControl()
);
map.addControl(
new maplibregl.TerrainControl({
source: 'terrainSource',
exaggeration: 1
})
);
map.on('load', () => {
// Add a geojson point source.
// Heatmap layers also work with a vector tile source.
map.addSource('earthquakes', {
'type': 'geojson',
'data':
'https://maplibre.org/maplibre-gl-js/docs/assets/earthquakes.geojson'
});
map.addLayer(
{
'id': 'earthquakes-heat',
'type': 'heatmap',
'source': 'earthquakes',
'maxzoom': 9,
'paint': {
// Increase the heatmap weight based on frequency and property magnitude
'heatmap-weight': [
'interpolate',
['linear'],
['get', 'mag'],
0,
0,
6,
1
],
// Increase the heatmap color weight weight by zoom level
// heatmap-intensity is a multiplier on top of heatmap-weight
'heatmap-intensity': [
'interpolate',
['linear'],
['zoom'],
0,
1,
9,
3
],
// Color ramp for heatmap. Domain is 0 (low) to 1 (high).
// Begin color ramp at 0-stop with a 0-transparency color
// to create a blur-like effect.
'heatmap-color': [
'interpolate',
['linear'],
['heatmap-density'],
0,
'rgba(33,102,172,0)',
0.2,
'rgb(103,169,207)',
0.4,
'rgb(209,229,240)',
0.6,
'rgb(253,219,199)',
0.8,
'rgb(239,138,98)',
1,
'rgb(178,24,43)'
],
// Adjust the heatmap radius by zoom level
'heatmap-radius': [
'interpolate',
['linear'],
['zoom'],
0,
2,
9,
20
],
// Transition from heatmap to circle layer by zoom level
'heatmap-opacity': [
'interpolate',
['linear'],
['zoom'],
7,
1,
9,
0
]
}
}
);
map.addLayer(
{
'id': 'earthquakes-point',
'type': 'circle',
'source': 'earthquakes',
'minzoom': 7,
'paint': {
// Size circle radius by earthquake magnitude and zoom level
'circle-radius': [
'interpolate',
['linear'],
['zoom'],
7,
['interpolate', ['linear'], ['get', 'mag'], 1, 1, 6, 4],
16,
['interpolate', ['linear'], ['get', 'mag'], 1, 5, 6, 50]
],
'circle-color': [
'interpolate',
['linear'],
['get', 'mag'],
1,
'rgba(33,102,172,0)',
2,
'rgb(103,169,207)',
3,
'rgb(209,229,240)',
4,
'rgb(253,219,199)',
5,
'rgb(239,138,98)',
6,
'rgb(178,24,43)'
],
'circle-stroke-color': 'white',
'circle-stroke-width': 1,
// Transition from heatmap to circle layer by zoom level
'circle-opacity': [
'interpolate',
['linear'],
['zoom'],
7,
0,
8,
1
]
}
}
);
});
</script>
</body>
</html>