openlayers2 笔记
复杂线获取质心错误，实际返回一个端点
feature.geometry.getCentroid() 中当geometry类型是http://dev.openlayers.org/releases/OpenLayers-2.13.1/doc/apidocs/files/OpenLayers/Geometry/MultiLineString-js.html#OpenLayers.Geometry.MultiLineString 时返回的质心错误
LineString未做测试
转载自：https://blog.csdn.net/u010429656/article/details/52619352
