leaflet-examples/map-geojson.html at main · jonnymccullagh/leaflet-examples · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
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    <meta name="description" content="">
    <title>Leaflet Examples</title>

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              <ul class="dropdown-menu" aria-labelledby="dropdown03">
                <li><a class="dropdown-item" href="map-simple.html">Simple Example</a></li>
                <li><a class="dropdown-item" href="map-satellite.html">Satellite Layer</a></li>
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                <li><a class="dropdown-item" href="map-geojson.html">GeoJSON Area</a></li>
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<main>

  <section class="py-5 container">
    <h1 class="fw-light">Add GeoJSON Outline</h1>
    <div class="row py-lg-5">
        <style>
            #map { height: 380px; }
        </style>
        <div id="map"></div>
    </div>


    <div class="row py-lg-5">
      <div class="col-lg-6 col-md-8">
        <h3>Try It Out</h3>
        <p>Zoom in to the marker and notice the polygon shape defined</p>
        <h3>Code</h3>
        <pre>

          var geojsonFeature = {
            "type": "FeatureCollection",
            "features": [
              {
                "type": "Feature",
                "properties": {},
                "geometry": {
                  "type": "Polygon",
                  "coordinates": [
                    [
                      [
                        -6.337939202785492,
                        54.17750946223595
                      ],
                      [
                        -6.337791681289673,
                        54.17731401762
                      ],
                      [
                        -6.337337046861649,
                        54.17743489512197
                      ],
                      [
                        -6.337392032146454,
                        54.177507107487024
                      ],
                      [
                        -6.337371915578842,
                        54.17751652648189
                      ],
                      [
                        -6.337402760982513,
                        54.17755734210142
                      ],
                      [
                        -6.337433606386185,
                        54.177550277862466
                      ],
                      [
                        -6.337492614984512,
                        54.1776334788225
                      ],
                      [
                        -6.337939202785492,
                        54.17750946223595
                      ]
                    ]
                  ]
                }
              }
            ]
        }
        L.geoJSON(geojsonFeature).addTo(map);
      </pre>
        <p class="lead">View the source of this page to see fully how the map is created. In this example notice:</p>
        <ul>
            <li>We create a geojsonFeature variable</li>
            <li>We have coordinates for each of 9 points defined in geojsonFeature</li>
            <li>We use the geoJSON function with the geojsonFeature variable to add the shape to the map</li>
        </ul>
        <p>
          <a href="map-cluster.html" class="btn btn-primary my-2">Next Example</a>
          <a href="map-image.html" class="btn btn-default">Previous</a>
        </p>


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    <script src="https://unpkg.com/leaflet@1.6.0/dist/leaflet.js"></script>
    <script>

        var mapbox_url = 'https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.eyJ1Ijoiam9ubnltY2N1bGxhZ2giLCJhIjoiY2xsYzdveWh4MGhwcjN0cXV5Z3BwMXA1dCJ9.QoEHzPNq9DtTRrdtXfOdrw';
        var mapbox_attribution = '© Mapbox © OpenStreetMap Contributors';
        var esri_url ='https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}';
        var esri_attribution = '© Esri © OpenStreetMap Contributors';

        var lyr_satellite = L.tileLayer(esri_url, {id: 'MapID', maxZoom: 20, tileSize: 512, zoomOffset: -1, attribution: esri_attribution});
        var lyr_streets   = L.tileLayer(mapbox_url, {id: 'mapbox/streets-v11', maxZoom: 28, tileSize: 512, zoomOffset: -1, attribution: mapbox_attribution});
        var marker = L.marker([54.17747885048963, -6.337641477584839], {draggable:'false'}).bindPopup('<b>Newry Town Hall</b>');
        var lg_markers = L.layerGroup([marker]);


        var map = L.map('map', {
            center: [54.17747885048963, -6.337641477584839],
            zoom: 18,
            layers: [lyr_satellite, lyr_streets, lg_markers]
        });

        var baseMaps = {
            "Streets": lyr_streets,
            "Satellite": lyr_satellite
        };
        var overlayMaps = {
            "Markers": lg_markers,
        };

        L.control.layers(baseMaps, overlayMaps).addTo(map);

        var geojsonFeature = {
            "type": "FeatureCollection",
            "features": [
              {
                "type": "Feature",
                "properties": {},
                "geometry": {
                  "type": "Polygon",
                  "coordinates": [
                    [
                      [
                        -6.337939202785492,
                        54.17750946223595
                      ],
                      [
                        -6.337791681289673,
                        54.17731401762
                      ],
                      [
                        -6.337337046861649,
                        54.17743489512197
                      ],
                      [
                        -6.337392032146454,
                        54.177507107487024
                      ],
                      [
                        -6.337371915578842,
                        54.17751652648189
                      ],
                      [
                        -6.337402760982513,
                        54.17755734210142
                      ],
                      [
                        -6.337433606386185,
                        54.177550277862466
                      ],
                      [
                        -6.337492614984512,
                        54.1776334788225
                      ],
                      [
                        -6.337939202785492,
                        54.17750946223595
                      ]
                    ]
                  ]
                }
              }
            ]
        }
        L.geoJSON(geojsonFeature).addTo(map);

    </script>
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