dataviz/MapLibre-render-KML-source-with-popup.html at main · aaronkyle/dataviz · GitHub

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<!doctype html>
<html class="no-js" lang="">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>KML/KMZ Viewer</title>

  <style>
    #map-container {
      width: 100%;
      height: 600px; /* Adjust the height as needed */
    }
  </style>

  <link rel='stylesheet' href='https://unpkg.com/maplibre-gl@2.0.0/dist/maplibre-gl.css' />
  <script src='https://unpkg.com/maplibre-gl@2.0.0/dist/maplibre-gl.js'></script>
  <script src="https://unpkg.com/@tmcw/togeojson"></script>
</head>

<body>

  <div id="map-container"></div>

  <script>
    var map = new maplibregl.Map({
      container: 'map-container',
      center: [-71.698, 42.041],
      zoom: 7.5,
      style: "https://basemaps.cartocdn.com/gl/voyager-gl-style/style.json",
      maplibreLogo: true,
      attributionControl: true
    });

    var popup = new maplibregl.Popup();

    map.on('load', function () {
      fetch('https://s3.amazonaws.com/geospatial.data/usa/ma/RTA_Boundaries.kml')
        .then(response => response.text())
        .then(kml => {
          var geojson = toGeoJSON.kml(new DOMParser().parseFromString(kml, 'text/xml'));
          console.log("JSON data attribute name:", geojson.name); // Log the JSON data attribute name
          console.log("Feature Collection data:", geojson); // Log the Feature Collection data
          map.addSource('kml-source', {
            type: 'geojson',
            data: geojson,
            generateId: true
          });

          map.addLayer({
            id: 'kml-layer',
            type: 'fill',
            source: 'kml-source',
            paint: {
              'fill-color': 'red',
              'fill-opacity': 0.8
            }
          });

          map.on('mouseenter', 'kml-layer', function (e) {
            var properties = e.features[0].properties;
            var popupContent = "<div>";
            for (var prop in properties) {
              popupContent += "<p><strong>" + prop + ":</strong> " + properties[prop] + "</p>";
            }
            popupContent += "</div>";
            popup.setLngLat(e.lngLat)
              .setHTML(popupContent)
              .addTo(map);
          });

          map.on('mousemove', 'kml-layer', function (e) {
            var featureId = e.features[0].id;
            map.setPaintProperty('kml-layer', 'fill-color', ['match', ['id'], featureId, 'blue', 'red']);
          });

          map.on('mouseleave', 'kml-layer', function () {
            map.setPaintProperty('kml-layer', 'fill-color', 'red');
            popup.remove();
          });

        });
    });
  </script>

</body>

</html>