mapper/map.html at master · Gleek/mapper · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content=
  "width=device-width, initial-scale=1.0">
  <title>Leaflet MarkerCluster with KML Upload</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/leaflet/dist/leaflet.css">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/leaflet.markercluster/dist/MarkerCluster.css">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/leaflet.markercluster/dist/MarkerCluster.Default.css">

  <style>
      #map {
        height: 90vh;
      }
      #upload {
        margin: 10px;
      }
      #toggle-clustering {
        position: absolute;
        top: 10px;
        right: 10px;
        z-index: 1000;
        background: white;
        padding: 5px;
        border: 1px solid #ccc;
      }
      .distance-label {
        background-color: rgba(255, 255, 255, 0.8);
        border: 1px solid #000;
        padding: 2px 5px;
        border-radius: 3px;
        font-size: 12px;
        text-align: center;
      }
  </style>
</head>
<body>
  <input type="file" id="upload" accept=".kml">
  <div id="toggle-clustering">
    <label><input type="checkbox" id="clustering-toggle"> Enable
    Clustering</label>
  </div>
  <div id="map"></div>
  <script src="https://cdn.jsdelivr.net/npm/leaflet/dist/leaflet.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/leaflet.markercluster/dist/leaflet.markercluster.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/leaflet-omnivore/leaflet-omnivore.min.js"></script>

  <script>

// Define a reusable Leaflet icon with default marker images
const defaultMarkerIcon = L.icon({
  iconUrl: "https://cdn.jsdelivr.net/npm/leaflet@1.9.3/dist/images/marker-icon.png",
  shadowUrl: "https://cdn.jsdelivr.net/npm/leaflet@1.9.3/dist/images/marker-shadow.png",
  iconSize: [15, 25], // smaller size of the icon
  iconAnchor: [7, 25],
  shadowSize: [25, 25], // smaller size of the shadow
  shadowAnchor: [7, 25],
});


      // Initialize the map
      var map = L.map("map").setView([0, 0], 2);

      var googleStreets = L.tileLayer(
        "http://{s}.google.com/vt?lyrs=m&x={x}&y={y}&z={z}",
        {
          maxZoom: 20,
          subdomains: ["mt0", "mt1", "mt2", "mt3"],
        }
      );

      googleStreets.addTo(map);
      // Add scale control to the map
      L.control.scale().addTo(map);

      // Create a marker cluster group
      var markers = L.markerClusterGroup({
        maxClusterRadius: 40,
      });

      // Create a layer group for non-clustered markers
      var nonClusteredMarkers = L.layerGroup();

      // Add the marker cluster group to the map
      map.addLayer(nonClusteredMarkers);
      // Variables to store the points and the route
      let rightClickCount = 0;
      let firstPoint = null;
      let secondPoint = null;
      let distanceLine = null;
      let distanceLabel = null;
      let secondMarker = null;
      let firstMarker = null;

      function fetchAndDrawRoute(start, end) {
        // OSRM public API endpoint
        const osrmEndpoint = `https://router.project-osrm.org/route/v1/driving/${start.lng},${start.lat};${end.lng},${end.lat}?overview=full&geometries=geojson`;

        fetch(osrmEndpoint)
          .then(response => {
            if (!response.ok) {
              throw new Error('Network response was not ok');
            }
            return response.json();
          })
          .then(data => {
            if (data.code !== 'Ok' || data.routes.length === 0) {
              throw new Error('No route found');
            }

            // Extract route geometry and distance
            const route = data.routes[0];
            const routeCoords = route.geometry.coordinates.map(coord => [coord[1], coord[0]]);
            const distance = route.distance; // in meters

            // Draw the route on the map
            if (distanceLine) {
              map.removeLayer(distanceLine);
            }
            distanceLine = L.polyline(routeCoords, {
              color: "blue",
              weight: 4,
              opacity: 0.7
            }).addTo(map);

            // Calculate distance text
            const distanceText = distance >= 1000
              ? (distance / 1000).toFixed(2) + " km"
              : distance.toFixed(2) + " m";

            // Add distance label at the midpoint of the route
            const midIndex = Math.floor(routeCoords.length / 2);
            const midPoint = L.latLng(routeCoords[midIndex][0], routeCoords[midIndex][1]);

            if (distanceLabel) {
              map.removeLayer(distanceLabel);
            }

            distanceLabel = L.marker(midPoint, {
              icon: L.divIcon({
                className: "distance-label",
                html: distanceText,
                iconSize: [100, 40],
                iconAnchor: [50, 20],
              }),
            }).addTo(map);
          })
          .catch(error => {
            console.error('Error fetching the route:', error);
            alert('Unable to fetch the route. Please try again.');

            // Cleanup in case of error
            if (distanceLine) {
              map.removeLayer(distanceLine);
              distanceLine = null;
            }
            if (distanceLabel) {
              map.removeLayer(distanceLabel);
              distanceLabel = null;
            }
            if (secondMarker) {
              map.removeLayer(secondMarker);
              secondMarker = null;
            }
            if (firstMarker) {
              map.removeLayer(firstMarker);
              firstMarker = null;
            }
            secondPoint = null;
            firstPoint = null;
            rightClickCount = 1; // Reset to allow re-selection of the second point
          });
      }


      // Handle clustering toggle
      document
        .getElementById("clustering-toggle")
        .addEventListener("change", function (event) {
          if (event.target.checked) {
            map.removeLayer(nonClusteredMarkers);
            map.addLayer(markers);
          } else {
            map.removeLayer(markers);
            map.addLayer(nonClusteredMarkers);
          }
        });
      document.getElementById("upload").addEventListener("change", function (event) {
        var file = event.target.files[0];
        if (file && file.name.endsWith(".kml")) {
          var reader = new FileReader();
          reader.onload = function (e) {
            var kmlText = e.target.result;
            var kmlLayer = omnivore.kml.parse(kmlText);
            markers.clearLayers();
            nonClusteredMarkers.clearLayers();
            kmlLayer.eachLayer(function (layer) {
              var latlng = layer.getLatLng();
              var circleMarker = L.circleMarker(latlng, {
                radius: 5, // small radius
                color: "#3388ff",
                fillColor: "#3388ff",
                weight: 1,
                fillOpacity: 0.5, // semi-transparent
              });
              if (
                layer.feature &&
                layer.feature.properties &&
                layer.feature.properties.name
              ) {
                circleMarker.bindPopup(layer.feature.properties.name);
              }
              markers.addLayer(circleMarker);
              nonClusteredMarkers.addLayer(circleMarker);
            });
            map.fitBounds(markers.getBounds());
          };
          reader.readAsText(file);
        } else {
          alert("Please upload a valid KML file.");
        }
      });

      // Handle right-clicks for measuring distance
      map.on("contextmenu", function (e) {
        rightClickCount += 1;

        if (rightClickCount === 1) {
          // First right-click: store the first point
          firstPoint = e.latlng;
          // Add a marker for the first point without a popup and assign a customId
          firstMarker = L.marker(firstPoint, {
            icon: defaultMarkerIcon,
          }).addTo(map);
          firstMarker.customId = "firstPoint";
        } else if (rightClickCount === 2) {
          // Second right-click: store the second point and fetch the route
          secondPoint = e.latlng;

          // Add marker for the second point without a popup and assign a custom property
          secondMarker = L.marker(secondPoint, {
            icon: defaultMarkerIcon,
          }).addTo(map);
          secondMarker.customId = "secondPoint";

          // Fetch and draw the route
          fetchAndDrawRoute(firstPoint, secondPoint);
        } else if (rightClickCount === 3) {
          // Third right-click: clear the route and labels
          if (distanceLine) {
            map.removeLayer(distanceLine);
            distanceLine = null;
          }
          if (distanceLabel) {
            map.removeLayer(distanceLabel);
            distanceLabel = null;
          }
          if (secondMarker) {
            map.removeLayer(secondMarker);
            secondMarker = null;
          }
          if (firstMarker) { // Ensure firstMarker is removed
            map.removeLayer(firstMarker);
            firstMarker = null;
          }
          // Reset points and counter
          firstPoint = null;
          secondPoint = null;
          rightClickCount = 0;
        } else {
          // Reset after the fourth right-click
          rightClickCount = 0;
        }
      });
  </script>
</body>
</html>