Center the map on a clicked symbol | UNL Map JS Docs

Use events and flyTo to center the map on a symbol.

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>Center the map on a clicked symbol</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",
center: [-90.96, -0.47],
zoom: 7.5,
});
 
map.on("load", function () {
// Add an image to use as a custom marker
map.loadImage(
"https://u-n-l.github.io/unl-map-js-docs/assets/custom_marker.png",
function (error, image) {
if (error) throw error;
map.addImage("custom-marker", image);
// Add a GeoJSON source with 3 points.
map.addSource("points", {
type: "geojson",
data: {
type: "FeatureCollection",
features: [
{
type: "Feature",
properties: {},
geometry: {
type: "Point",
coordinates: [-91.395263671875, -0.9145729757782163],
},
},
{
type: "Feature",
properties: {},
geometry: {
type: "Point",
coordinates: [-90.32958984375, -0.6344474832838974],
},
},
{
type: "Feature",
properties: {},
geometry: {
type: "Point",
coordinates: [-91.34033203125, 0.01647949196029245],
},
},
],
},
});
 
// Add a symbol layer
map.addLayer({
id: "symbols",
type: "symbol",
source: "points",
layout: {
"icon-image": "custom-marker",
},
});
}
);
 
// Center the map on the coordinates of any clicked symbol from the 'symbols' layer.
map.on("click", "symbols", function (e) {
map.flyTo({
center: e.features[0].geometry.coordinates,
});
});
 
// Change the cursor to a pointer when the it enters a feature in the 'symbols' layer.
map.on("mouseenter", "symbols", function () {
map.getCanvas().style.cursor = "pointer";
});
 
// Change it back to a pointer when it leaves.
map.on("mouseleave", "symbols", function () {
map.getCanvas().style.cursor = "";
});
});
</script>
 
</body>
</html>