Animate a series of images | UNL Map JS Docs

Use a series of image sources to create an animation.

Note

If you want to test this example, edit it in JSFiddle or CodePen and replace the "YOUR-OWN-API-KEY" and "YOUR-OWN-VPM-ID" placeholders with your actual api key and vpm id.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Animate a series of images</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://unpkg.com/unl-map-js@0.1.5/lib/unl-map-js.js"></script>
<link href="https://unpkg.com/unl-map-js@0.1.5/lib/unl-map-js.css" rel="stylesheet" />
<link
href="https://unpkg.com/maplibre-gl@2.1.9/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 UnlSdk.Map({
container: "map",
apiKey: "YOUR-OWN-API-KEY",
vpmId: "YOUR-OWN-VPM-ID",
maxZoom: 5.99,
minZoom: 4,
zoom: 5,
center: [-75.789, 41.874],
});
 
var frameCount = 5;
var currentImage = 0;
 
function getPath() {
return (
"https://u-n-l.github.io/unl-map-js-docs/assets/radar" +
currentImage +
".gif"
);
}
 
map.on("load", function () {
map.addSource("radar", {
type: "image",
url: getPath(),
coordinates: [
[-80.425, 46.437],
[-71.516, 46.437],
[-71.516, 37.936],
[-80.425, 37.936],
],
});
map.addLayer({
id: "radar-layer",
type: "raster",
source: "radar",
paint: {
"raster-fade-duration": 0,
},
});
 
setInterval(function () {
currentImage = (currentImage + 1) % frameCount;
map.getSource("radar").updateImage({ url: getPath() });
}, 200);
});
</script>
 
</body>
</html>