OpenLayers，很好的标记聚类 [英] OpenLayers, nice marker clustering

问题描述

您知道如何在OpenLayers中建立良好的集群，例如

Do you know how to have a nice clustering in OpenLayers such as this google example ?

推荐答案

您可以在上面的示例中将标签添加到pointStyle并解释该标签的上下文. 您的代码应如下所示:

You can add label to pointStyle in above example and explain context of this label. Your code should be something like this:

var pointStyle = new OpenLayers.Style({
    // ...
    'label': "${label}",
    // ...
  }, {
    context: {
      // ...
      label: function(feature) {
        // clustered features count or blank if feature is not a cluster
        return feature.cluster ? feature.cluster.length : "";  
      }
      // ..
    }
});

var styleMap = new OpenLayers.StyleMap({
  'default': pointStyle,
});

var googleLikeLayer = new OpenLayers.Layer.Vector("GoogleLikeLayer", {
  // ...
  styleMap  : styleMap,
  // ... 
});

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