openlayers删除矢量图层上的图形
必须先删除clear layer的source再remove
转载自：https://blog.csdn.net/qq_39846607/article/details/85272973
gis,openlayers,leaflet,gis应用,geoai,geoserver,cesium,python,arcpy,arcmap,webgis，gis可视化
gis,openlayers,leaflet,gis应用,geoai,geoserver,cesium,python,arcpy,arcmap,webgis，gis可视化
