MapLibre GL JS

This example fetches a 10-minute walking isochrone area for a point in Vienna and draws it as a filled polygon on a MapLibre GL map.

let map = new maplibregl.Map({
      container: "map",
      style: "https://styles.maptoolkit.net/maptoolkit/maptoolkit.summer.json?api_key=YOUR_API_KEY",
      center: [16.372182, 48.208266],
      zoom: 14,
    });
    map.on("load", () => {
      let point = [16.372493, 48.20883];
      let url = new URL("https://routing.maptoolkit.net/isochrone");
      url.searchParams.append("time", 10);
      url.searchParams.append("point", `${point[1]},${point[0]}`);
      url.searchParams.append("routeType", "foot");
      url.searchParams.append("api_key", "YOUR_API_KEY");
      fetch(url)
        .then((r) => r.json())
        .then((polygon) => {
          map.addSource("isochrone", { type: "geojson", data: { type: "Feature", geometry: { type: "Polygon", coordinates: [polygon.map((latLng) => latLng.reverse())] } } });
          map.addLayer({ id: "isochrone-fill", type: "fill", source: "isochrone", paint: { "fill-color": "#2a3561", "fill-opacity": 0.2 } });
          map.addLayer({ id: "isochrone-line", type: "line", source: "isochrone", layout: { "line-join": "round", "line-cap": "round" }, paint: { "line-color": "#2a3561", "line-width": 2 } });
          let $img = document.createElement("img");
          $img.src = "https://static.maptoolkit.net/sprites/toursprung/marker.svg";
          $img.width = 29; $img.height = 30;
          new maplibregl.Marker({ element: $img, anchor: "bottom" })
            .setLngLat(point).addTo(map)
            .setPopup(new maplibregl.Popup({ offset: 30 }).setHTML("<p>Within a 10 minute walking distance</p>"))
            .togglePopup();
        });
    });

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/maplibre-gl.js"></script>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/maplibre-gl.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>
    let map = new maplibregl.Map({
      container: "map",
      style: "https://styles.maptoolkit.net/maptoolkit/maptoolkit.summer.json?api_key=YOUR_API_KEY",
      center: [16.372182, 48.208266],
      zoom: 14,
    });
    map.on("load", () => {
      let point = [16.372493, 48.20883];
      let url = new URL("https://routing.maptoolkit.net/isochrone");
      url.searchParams.append("time", 10);
      url.searchParams.append("point", `${point[1]},${point[0]}`);
      url.searchParams.append("routeType", "foot");
      url.searchParams.append("api_key", "YOUR_API_KEY");
      fetch(url)
        .then((r) => r.json())
        .then((polygon) => {
          map.addSource("isochrone", { type: "geojson", data: { type: "Feature", geometry: { type: "Polygon", coordinates: [polygon.map((latLng) => latLng.reverse())] } } });
          map.addLayer({ id: "isochrone-fill", type: "fill", source: "isochrone", paint: { "fill-color": "#2a3561", "fill-opacity": 0.2 } });
          map.addLayer({ id: "isochrone-line", type: "line", source: "isochrone", layout: { "line-join": "round", "line-cap": "round" }, paint: { "line-color": "#2a3561", "line-width": 2 } });
          let $img = document.createElement("img");
          $img.src = "https://static.maptoolkit.net/sprites/toursprung/marker.svg";
          $img.width = 29; $img.height = 30;
          new maplibregl.Marker({ element: $img, anchor: "bottom" })
            .setLngLat(point).addTo(map)
            .setPopup(new maplibregl.Popup({ offset: 30 }).setHTML("<p>Within a 10 minute walking distance</p>"))
            .togglePopup();
        });
    });
  </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 centered around [16.372493, 48.20883] with an Isochrone for 10 minutes walking time around the center, using MapLibre GL.

Maptoolkit Maps JS Leaflet