Openlayers

Question

我在各种 KML 文件中有很多 POI，我需要将其导入到我的 Openlayers 地图中。每个文件的地标应该有自己的显示层。

谁能告诉我如何使用数组来收集不特定数量的 KML 文件。

这是我的代码，它导入单个 KML 文件：

map = new OpenLayers.Map("mapdiv");
map.addLayer(new OpenLayers.Layer.OSM("Local Tiles", "tiles/${z}/${x}/${y}.png", {numZoomLevels: 19, alpha: true, isBaseLayer: true}));

var kml = new OpenLayers.Layer.Vector("KML", {
        strategies: [new OpenLayers.Strategy.Fixed()],
        protocol: new OpenLayers.Protocol.HTTP({
            url: "kml/test.kml",
            format: new OpenLayers.Format.KML({
                extractStyles: true, 
                extractAttributes: true,
                maxDepth: 2
            })
        })
    });


map.addLayer(kml);


var lonLat = new OpenLayers.LonLat( 7.21495 ,50.54819 )
      .transform(
        new OpenLayers.Projection("EPSG:4326"), 
        map.getProjectionObject() 
      );
var zoom=17;
map.setCenter (lonLat, zoom);  





var controls = {
  selector: new OpenLayers.Control.SelectFeature(kml, { onSelect: createPopup, onUnselect: destroyPopup })
};

function createPopup(feature) {
  feature.popup = new OpenLayers.Popup.FramedCloud("pop",
      feature.geometry.getBounds().getCenterLonLat(),
      null,
      '<div class="markerContent">'+feature.attributes.description+'</div>',
      null,
      true,
      function() { controls['selector'].unselectAll(); }
  );

  map.addPopup(feature.popup);
}

function destroyPopup(feature) {
  feature.popup.destroy();
  feature.popup = null;
}

map.addControl(controls['selector']);
controls['selector'].activate();

Answer 1

这是一个简单的示例，展示了如何将任意 URL 数组转换（或“map”）为 KML 图层数组，然后可以使用 addLayers方法：

var kmlSources = ['kml/first.kml', 'kml/second.kml', 'kml/third.js'];

var kmlLayers = kmlSources.map(function(kmlLocation) {
  return new OpenLayers.Layer.Vector('KML', {
    strategies: [new OpenLayers.Strategy.Fixed()],
    protocol: new OpenLayers.Protocol.HTTP({
      url: 'kml/test.kml',
      // other options
    })
  });
});

map.addLayers(kmlLayers);

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arrays

kml