Animate a Point
Animating a GeoJSON point layer requires recalculating the feature’s coordinates on each frame and passing a new FeatureCollection to setData on the source. This example computes a circular orbit using trigonometry and updates the source at 60fps via requestAnimationFrame. Use this pattern as a base for any animation where a point needs to follow a computed path rather than a recorded one.
const API_KEY = 'YOUR_API_KEY';
const center = [11.39085, 47.27574];
const radius = 0.05;
const point = {
type: 'Feature',
geometry: { type: 'Point', coordinates: [...center] }
};
const map = new maptoolkit.Map({
container: 'map',
apiKey: API_KEY,
style: `https://styles.maptoolkit.net/maptoolkit/maptoolkit.summer.json?api_key=${API_KEY}`,
center,
zoom: 11,
attributionControl: { compact: false }
});
map.addControl(new maptoolkit.NavigationControl(), 'top-right');
map.on('load', () => {
map.addSource('point', { type: 'geojson', data: point });
map.addLayer({
id: 'point',
type: 'circle',
source: 'point',
paint: { 'circle-radius': 10, 'circle-color': '#ee8a65', 'circle-stroke-width': 2, 'circle-stroke-color': '#fff' }
});
function animate(timestamp) {
const t = (timestamp / 4000) % 1;
const angle = t * 2 * Math.PI;
point.geometry.coordinates = [
center[0] + radius * Math.cos(angle) / Math.cos(center[1] * Math.PI / 180),
center[1] + radius * Math.sin(angle)
];
map.getSource('point').setData(point);
requestAnimationFrame(animate);
}
requestAnimationFrame(animate);
});<!DOCTYPE html>
<html lang="en">
<head>
<title>Animate a Point - Maptoolkit Maps JS</title>
<meta property="og:description" content="Animate a point in a circle using requestAnimationFrame and setData." />
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://unpkg.com/@maptoolkit/[email protected]/dist/maptoolkit.js"></script>
<link rel="stylesheet" href="https://unpkg.com/@maptoolkit/[email protected]/dist/maptoolkit.css" />
<style>
html, body { width: 100%; height: 100%; margin: 0; padding: 0; }
#map { width: 100%; height: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<script>
const API_KEY = 'YOUR_API_KEY';
const center = [11.39085, 47.27574];
const radius = 0.05;
const point = {
type: 'Feature',
geometry: { type: 'Point', coordinates: [...center] }
};
const map = new maptoolkit.Map({
container: 'map',
apiKey: API_KEY,
style: `https://styles.maptoolkit.net/maptoolkit/maptoolkit.summer.json?api_key=${API_KEY}`,
center,
zoom: 11,
attributionControl: { compact: false }
});
map.addControl(new maptoolkit.NavigationControl(), 'top-right');
map.on('load', () => {
map.addSource('point', { type: 'geojson', data: point });
map.addLayer({
id: 'point',
type: 'circle',
source: 'point',
paint: { 'circle-radius': 10, 'circle-color': '#ee8a65', 'circle-stroke-width': 2, 'circle-stroke-color': '#fff' }
});
function animate(timestamp) {
const t = (timestamp / 4000) % 1;
const angle = t * 2 * Math.PI;
point.geometry.coordinates = [
center[0] + radius * Math.cos(angle) / Math.cos(center[1] * Math.PI / 180),
center[1] + radius * Math.sin(angle)
];
map.getSource('point').setData(point);
requestAnimationFrame(animate);
}
requestAnimationFrame(animate);
});
</script>
</body>
</html>Use the prompt below with any LLM to get the same result. Make sure the Maptoolkit MCP server is connected first — check out AI Integration & MCP to get started.
Use the Maptoolkit Connector. Create an interactive map with zoom level 11, centered around [11.39085, 47.27574]. Add an animated GeoJSON point that moves in a circle around the center.