Automatischer Zoom auf Multipolygon mit Faltblatt

Ich habe einen Geojson mit einem Multipolygon und möchte dieses Multipolygon an die Karte anpassen. Die Karte zentriert sich nur auf einem Polygon, nicht auf dem Multipolygon.

Hier ist mein Skript

    var map = L.map('map',{ zoomControl:false })
              .setView([<?php echo $lat; ?>, <?php echo $lng; ?>], 12);


            var zoomFS = new L.Control.ZoomFS(); 
    map.addControl(zoomFS);

    var defaultLayer = new L.TileLayer.MapBox.Light({minZoom: 10, maxZoom: 16});
    map.addLayer(defaultLayer);

    var info = L.control();

    info.onAdd = function (map) {
        this._div = L.DomUtil.create('div', 'info');
        this.update();
        return this._div;
    };

    info.update = function (props) {
        this._div.innerHTML = '<h4>Massifs forestiers près de </h4>' +  (props ?
            '<b>' + props.LLIB_FRT +'</b><br />'
            : 'Survolez une zone colorée');
    };

    info.addTo(map);


    // get color depending on population density value
    function getColor(d) {
        return d == 'OUI' ? '#238B45' :
               d == 'NON'  ? '#74C476' :
               '';
    }

    function style(feature) {
        return {
            weight: 1,
            opacity: 1,
            color: 'white',
            dashArray: '',
            fillOpacity: 0.7,
            fillColor: getColor(feature.properties.CDOM_FRT)
        };
    }

    function highlightFeature(e) {
        var layer = e.target;

        layer.setStyle({
            weight: 3,
            color: '#666',
            dashArray: '',
            fillOpacity: 0.7,
            fillColor: '#C7E9C0'
        });

        if (!L.Browser.ie && !L.Browser.opera) {
            layer.bringToFront();
        }

        info.update(layer.feature.properties);
    }

    var geojson;

    function resetHighlight(e) {
        geojson.resetStyle(e.target);
        info.update();
    }

    function zoomToFeature(e) {
        map.fitBounds(e.target.getBounds());
    }


    function onEachFeature(feature, layer) {
        layer.on({
            mouseover: highlightFeature,
            mouseout: resetHighlight,
            click: zoomToFeature
        });
    }

    geojson = L.geoJson(foret, {
        style: style,
        onEachFeature: onEachFeature
    }).addTo(map);

            map.fitBounds(map.getBounds());

    var legend = L.control({position: 'bottomright'});

    legend.onAdd = function (map) {

    var div = L.DomUtil.create('div', 'info legend'),
            grades = ['OUI','NON'],
            labels = [],
            from, to;


            labels.push(
                '<i style="background:' + getColor('OUI') + '"></i> Forêt domaniale<br />' + '<i style="background:' + getColor('NON') + '"></i> Autre forêt'
                 );


        div.innerHTML = labels.join('<br />') + '<br /><small>Source ONF</small>';
        return div;
    };


    legend.addTo(map);

Und mein Geojson-Aufruf vor dem Skript:

var foret = {"type": "FeatureCollection","features": [{ "type": "Feature","id":"28", "properties": { "LLIB_FRT":"Forêt communale d'Hinsingen", "CDOM_FRT":"NON"}, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ 6.9943980558132, 48.946433094078 ], [ 6.994620292006, 48.946654797086 ], [ 6.9946440493621, 48.946769064939 ], [ 6.9942757111879, 48.947051596133 ], [ 6.994525224939, 48.947130121777 ], [ 6.9949682000749, 48.946963549201 ], [ 6.9953766392947, 48.947023616958 ], [ 6.9957374325074, 48.946813022271 ], [ 6.9965129612099, 48.946224218666 ], [ 6.9961325523574, 48.945968748319 ], [ 6.9957770974676, 48.945782611345 ], [ 6.9957646870665, 48.945668975401 ], [ 6.9959606190443, 48.945511036547 ], [ 6.9946195521361, 48.94466102012 ], [ 6.994630665892, 48.944546885841 ], [ 6.9947706431545, 48.944451927805 ], [ 6.9943890358713, 48.943557180488 ], [ 6.9939647083228, 48.942850378597 ], [ 6.9936098649794, 48.943031218817 ], [ 6.990978273955, 48.944169736953 ], [ 6.9907916915416, 48.944275487598 ], [ 6.9906590303195, 48.944540260439 ], [ 6.9903122282768, 48.945515871105 ], [ 6.9899779107984, 48.945891734939 ], [ 6.9897536964784, 48.946062513595 ], [ 6.9906082903887, 48.946007229028 ], [ 6.9907530326376, 48.946038714842 ], [ 6.9908245833021, 48.94612737104 ], [ 6.9909366304299, 48.946984068611 ], [ 6.9928842027716, 48.947039217107 ], [ 6.9929248400957, 48.946763159392 ], [ 6.9930024317067, 48.946669408079 ], [ 6.9931592044754, 48.946642240938 ], [ 6.9939125945186, 48.946695983544 ], [ 6.9940803721788, 48.946467213889 ], [ 6.9942616812201, 48.946401938807 ], [ 6.9943980558132, 48.946433094078 ] ],[ [ 7.0132518064932, 48.954701866676 ], [ 7.0130792746756, 48.955281720291 ], [ 7.0131097085661, 48.955406738419 ], [ 7.0134535050459, 48.956019942767 ], [ 7.0136768179147, 48.956641121897 ], [ 7.0136432241135, 48.956891471012 ], [ 7.013391660559, 48.95756050072 ], [ 7.0164377304443, 48.958126765886 ], [ 7.0173343130064, 48.958220743678 ], [ 7.0180405329659, 48.958235207654 ], [ 7.0180712371346, 48.957763530194 ], [ 7.018466890148, 48.957337559452 ], [ 7.0183245760167, 48.957321560691 ], [ 7.0182167345232, 48.957234693134 ], [ 7.0176940753708, 48.955926500229 ], [ 7.0171570061764, 48.955918750115 ], [ 7.0170252455885, 48.955885108994 ], [ 7.0165780794306, 48.955358357152 ], [ 7.016549105281, 48.955117411187 ], [ 7.0159152497559, 48.95481071823 ], [ 7.0155138192773, 48.954679378104 ], [ 7.015287839558, 48.954917146081 ], [ 7.015151253069, 48.954947663459 ], [ 7.0142533774551, 48.954711047176 ], [ 7.012862311613, 48.954409014242 ], [ 7.013130198481, 48.95455616266 ], [ 7.0132518064932, 48.954701866676 ] ] ] ] } }]};

Danke für Ihre Hilfe!

Heutzutage können Sie die getBoundsMethode eines MultiPolygon-Objekts verwenden und dann die Grenzen einer Karte festlegen.

var multipolygon = L.geoJson(foret);
multipolygon.addTo(map);
map.fitBounds(multipolygon.getBounds());

Ich habe wenig Erfahrung mit Flugblättern, aber dies scheint ein Fehler in getBounds zu sein, wenn es um ein Multipolygon geht.

Hier ist eine Problemumgehung, um die vollständigen Grenzen eines Multipolygons zu berechnen:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />

  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <link rel="stylesheet" href="../dist/leaflet.css" />
  <!--[if lte IE 8]><link rel="stylesheet" href="../dist/leaflet.ie.css" /><![endif]-->
</head>
<body>
  <div id="map" style="width: 600px; height: 400px"></div>
  <script>
    var foret = {"type": "FeatureCollection","features": [{ "type": "Feature","id":"28", "properties": { "LLIB_FRT":"Forêt communale d'Hinsingen", "CDOM_FRT":"NON"}, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ 6.9943980558132, 48.946433094078 ], [ 6.994620292006, 48.946654797086 ], [ 6.9946440493621, 48.946769064939 ], [ 6.9942757111879, 48.947051596133 ], [ 6.994525224939, 48.947130121777 ], [ 6.9949682000749, 48.946963549201 ], [ 6.9953766392947, 48.947023616958 ], [ 6.9957374325074, 48.946813022271 ], [ 6.9965129612099, 48.946224218666 ], [ 6.9961325523574, 48.945968748319 ], [ 6.9957770974676, 48.945782611345 ], [ 6.9957646870665, 48.945668975401 ], [ 6.9959606190443, 48.945511036547 ], [ 6.9946195521361, 48.94466102012 ], [ 6.994630665892, 48.944546885841 ], [ 6.9947706431545, 48.944451927805 ], [ 6.9943890358713, 48.943557180488 ], [ 6.9939647083228, 48.942850378597 ], [ 6.9936098649794, 48.943031218817 ], [ 6.990978273955, 48.944169736953 ], [ 6.9907916915416, 48.944275487598 ], [ 6.9906590303195, 48.944540260439 ], [ 6.9903122282768, 48.945515871105 ], [ 6.9899779107984, 48.945891734939 ], [ 6.9897536964784, 48.946062513595 ], [ 6.9906082903887, 48.946007229028 ], [ 6.9907530326376, 48.946038714842 ], [ 6.9908245833021, 48.94612737104 ], [ 6.9909366304299, 48.946984068611 ], [ 6.9928842027716, 48.947039217107 ], [ 6.9929248400957, 48.946763159392 ], [ 6.9930024317067, 48.946669408079 ], [ 6.9931592044754, 48.946642240938 ], [ 6.9939125945186, 48.946695983544 ], [ 6.9940803721788, 48.946467213889 ], [ 6.9942616812201, 48.946401938807 ], [ 6.9943980558132, 48.946433094078 ] ],[ [ 7.0132518064932, 48.954701866676 ], [ 7.0130792746756, 48.955281720291 ], [ 7.0131097085661, 48.955406738419 ], [ 7.0134535050459, 48.956019942767 ], [ 7.0136768179147, 48.956641121897 ], [ 7.0136432241135, 48.956891471012 ], [ 7.013391660559, 48.95756050072 ], [ 7.0164377304443, 48.958126765886 ], [ 7.0173343130064, 48.958220743678 ], [ 7.0180405329659, 48.958235207654 ], [ 7.0180712371346, 48.957763530194 ], [ 7.018466890148, 48.957337559452 ], [ 7.0183245760167, 48.957321560691 ], [ 7.0182167345232, 48.957234693134 ], [ 7.0176940753708, 48.955926500229 ], [ 7.0171570061764, 48.955918750115 ], [ 7.0170252455885, 48.955885108994 ], [ 7.0165780794306, 48.955358357152 ], [ 7.016549105281, 48.955117411187 ], [ 7.0159152497559, 48.95481071823 ], [ 7.0155138192773, 48.954679378104 ], [ 7.015287839558, 48.954917146081 ], [ 7.015151253069, 48.954947663459 ], [ 7.0142533774551, 48.954711047176 ], [ 7.012862311613, 48.954409014242 ], [ 7.013130198481, 48.95455616266 ], [ 7.0132518064932, 48.954701866676 ] ] ] ] } }]};
  </script>
  <script src="../dist/leaflet.js"></script>

  <script>
    var map = L.map('map').setView([48.9390, 6.9797], 14);

    L.tileLayer('http://{s}.tile.cloudmade.com/{key}/22677/256/{z}/{x}/{y}.png', {
      attribution: 'Map data &copy; 2011 OpenStreetMap contributors, Imagery &copy; 2012 CloudMade',
      key: 'BC9A493B41014CAABB98F0471D759707'
    }).addTo(map);

    function onEachFeature(feature, layer) {
      if ( feature.geometry.type === "MultiPolygon" ) {
        // get the bounds for the first polygon that makes up the multipolygon
        var bounds = layer.getBounds();
        // loop through coordinates array
        // skip first element as the bounds var represents the bounds for that element
        for ( var i = 1, il = feature.geometry.coordinates[0].length; i < il; i++ ) {
          var ring = feature.geometry.coordinates[0][i];
          var latLngs = ring.map(function(pair) {
            return new L.LatLng(pair[1], pair[0]);
          });
          var nextBounds = new L.LatLngBounds(latLngs);
          bounds.extend(nextBounds);
        }
        map.fitBounds(bounds);
      }
      var popupContent = "<p>I started out as a GeoJSON " +
          feature.geometry.type + ", but now I'm a Leaflet vector!</p>";

      if (feature.properties && feature.properties.popupContent) {
        popupContent += feature.properties.popupContent;
      }

      layer.bindPopup(popupContent);
    }

    var geoJson = L.geoJson([foret], {

      style: function (feature) {
        return feature.properties && feature.properties.style;
      },
      onEachFeature: onEachFeature

    }).addTo(map);

  </script>
</body>
</html>