OpenLayers聚類 - 聚類數據不會出現在event.feature對象中

我的問題很簡單 - 我使用Dojo（但不是Dojox openlayers模塊）創建一個映射項目。我已經關注網絡上的例子，爲元數據和集羣創建一些懸停氣泡。我目前正試圖繪製一組由傳感器記錄的100多個觀測值（從不移動，因此每個觀測值都有相同的經度/緯度）。選擇對象時，觸發的事件不包含feature.cluster對象。在任何縮放級別，只有頂級功能出現，我無法訪問任何其他數據。我究竟做錯了什麼？OpenLayers聚類 - 聚類數據不會出現在event.feature對象中

drawObservations: function(data){ 
       console.info("drawing observatoins", data); 

       if (this.observationLayer !== null){ 
        this.map.removeLayer(this.observationLayer); 
       } 
       console.info("building features"); 
       var features = []; 
       for (var i in data.observations){ 

        //console.info("working on observation: ", data.observations[i]); 
        var point = new OpenLayers.Geometry.Point(data.observations[i].longitude, data.observations[i].latitude); 
        //console.info("point: ", point); 


        features[i] = new OpenLayers.Feature.Vector(point, { 
         id : data.observations[i].id, 
         startTime: data.observations[i].startTime, 
         endTime: data.observations[i].endTime 
        }, { 
         fillColor : '#008040', 
         fillOpacity : 0.8,      
         strokeColor : "#ee9900", 
         strokeOpacity : 1, 
         strokeWidth : 1, 
         pointRadius : 8 
        }); 

       } 
       console.info("features size: ", features.length); 
       console.info("building vectors"); 

       this.observationLayer = new OpenLayers.Layer.Vector("Observations", { 
        projection: "EPSG:4326", 
        strategies: [      
        new OpenLayers.Strategy.Cluster() 
        ], 
        eventListeners:{ 
         'featureselected':function(evt){ 
          console.info("feature selected: ", evt); 
          console.info("this: ", this); 
          var feature = evt.feature; 
          var popup = new OpenLayers.Popup.FramedCloud("popup", 
           OpenLayers.LonLat.fromString(feature.geometry.toShortString()), 
           null, 
           "<div style='font-size:.8em'><h3>Observation - " + feature.attributes.id + "</h3><hr/><b>Start Time: </b>" + feature.attributes.startTime + "<br/><b>End Time: </b>" + feature.attributes.endTime + "</div>", 
           null, 
           true 
           ); 
          feature.popup = popup; 
          this.map.addPopup(popup); 
         }, 
         'featureunselected':function(evt){ 
          console.info("feature unselected: ", evt); 
          var feature = evt.feature; 
          this.map.removePopup(feature.popup); 
          feature.popup.destroy(); 
          feature.popup = null; 
         } 
        } 
       }); 

       console.info("adding features to vector", this.observationLayer); 

       this.observationLayer.addFeatures(features); 

       this.map.addLayer(this.observationLayer); 

       var selector = new OpenLayers.Control.SelectFeature(this.observationLayer,{ 
        hover:true, 
        autoActivate:true 
       }); 
       this.observationLayer.events.on({ 
        "featureselected": this.display 
       }); 

       this.map.addControl(selector); 
      }, 

      display: function(event){ 
       console.info("event: ", event); 

      }

來源

2012-12-18 Bal

看來，關鍵是從該層中移除功能，並將它們在它們重新添加圖層已經添加到地圖後：

this.observationLayer.removeFeatures(this.observationLayer.features); 
this.observationLayer.addFeatures(features);

本作羣集神奇的工作。

來源

2012-12-20 16:59:58 Bal

OpenLayers聚類 - 聚類數據不會出現在event.feature對象中

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