Question

是否有办法将onEachFeature事件（见下文）中通过.getCenter（）创建的中心点添加到L.Marker或类似的对象中，该对象包含所有创建的中心点该事件可以由Leaflet.Markercluster使用吗？

我认为使用featureGroup可能是解决方案，但显然不是。

我可以通过L.Marker或L.FeatureGroup上的addTo（map）方法在地图上显示非聚集的中心点，但不幸的是，当我尝试在这两个对象中使用markerCluster创建时，地图出现空白。浏览器中的控制台上没有出现任何错误消息。

我对JS仍然非常认真，所以我有预感，我缺少一些基本的东西，也许是关于L.Markercluster本身，以及我对这里任何noob错误的道歉。

库：

<!-- Leaflet -->

<link rel="stylesheet" href="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css"
  integrity="sha512-M2wvCLH6DSRazYeZRIm1JnYyh22purTM+FDB5CsyxtQJYeKq83arPe5wgbNmcFXGqiSH2XR8dT/fJISVA1r/zQ=="
  crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js"
  integrity="sha512-lInM/apFSqyy1o6s89K4iQUKg6ppXEgsVxT35HbzUupEVRh2Eu9Wdl4tHj7dZO0s1uvplcYGmt3498TtHq+log=="
  crossorigin=""></script>

<!-- ESRI Leaflet -->

<script src="https://unpkg.com/esri-leaflet@2.0.4/dist/esri-leaflet.js"></script>

<!-- Leaflet-markercluster -->

<link rel="stylesheet" href="https://unpkg.com/leaflet.markercluster@1.0.6/dist/MarkerCluster.css"></script>
<link rel="stylesheet" href="https://unpkg.com/leaflet.markercluster@1.0.6/dist/MarkerCluster.Default.css"></script>
<script src="https://unpkg.com/leaflet.markercluster@1.0.6/dist/leaflet.markercluster.js"></script>

<!--  Leaflet.MarkerCluster.LayerSupport -->

<script src="https://unpkg.com/leaflet.markercluster.layersupport@1.0.5/dist/leaflet.markercluster.layersupport.js"></script>

脚本：

<script>

  var map = L.map('map', {
    center: [42.389810, -72.524684],
    zoom: 5
  });

  var esriTopo = L.esri.basemapLayer('Topographic').addTo(map);

  var ProjectMap = L.esri.featureLayer ({
    url: 'https://services.arcgis.com/2gdL2gxYNFY2TOUb/arcgis/rest/services/NECSC_Test_Data/FeatureServer/1',
    //cheap hack to making the polygons invisible
    weight: 0,
    fillOpacity: 0,

    // creating the centerpoints
    onEachFeature: function(feature,layer){
      if (feature.geometry.type = 'Polygon') {
        var bounds = layer.getBounds();
        var center = bounds.getCenter();

        var centerpoints = L.marker(center);
        centerpointlayer.addLayer(centerpoints);
        // centerpointlayer defined below as global variable
      };
    };
  }).addTo(map);

  var centerpointlayer = L.featureGroup();
  // 

  var clusters = L.markerClusterGroup.layerSupport();
  clusters.addTo(map);
  clusters.checkIn(centerpointlayer);

  map.zoomIn(5);
  map.zoomOut(5);

</script>

</body>
</html>

Answer 1

Gah ......事实证明我实施的L.Markercluster是错误的（即，不像它在API文档中所说的那样）。最后/脚本末尾的代码最后一行应为：

var centerpointlayer = L.layerGroup();
var clusters = L.markerClusterGroup.layerSupport();
clusters.addLayer(centerpointlayer);
map.addLayer(clusters);

Leaflet：MarkerCluster可使用的多边形中心对象

1 个答案: