Tự động phóng to trên đa đường với tờ rơi

Tôi có một Geojson với đa đường và tôi muốn khớp đa tuyến này với bản đồ. Trung tâm bản đồ chỉ trên một đa giác chứ không phải trên đa giác.

Đây là kịch bản của tôi

    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);

Và My Geojson gọi trước kịch bản:

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 ] ] ] ] } }]};

Cảm ơn bạn đã giúp đỡ!

Ngày nay, bạn có thể sử dụng getBoundsphương thức của đối tượng MultiPolygon và hơn là sử dụng phương thức đó để đặt giới hạn của bản đồ.

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

Tôi có ít kinh nghiệm với tờ rơi, nhưng điều này có vẻ như là một lỗi trong getBound khi xử lý đa đường.

Đây là một cách giải quyết để tính toán giới hạn đầy đủ của đa tuyến:

<!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>