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OpenLayers Workshop（二）Vector Data

OpenLayers Workshop（二）Vector Data
Let’s make a feature editor! 让我们做一个功能编辑器吧！
Rendering GeoJSON 渲染GeoJSON数据
Drag and drop 抓和放
Modifying features 修改特征
Drawing new features 画新的特征
Snapping 抓取
Downloading features 下载特征结果
Making it look nice 让地图好看些