Xtools,可以看作ArcGIS的一个扩展模块，不过是free的，一些高手的杰作，可以完成 Calculate Area, Perimeter, Length, Acres, Hectares Transfer / Convert Selected Features Convert Multipart Shapes To Single Part Convert Polygons to Polylines Make One Polygon From Polylines Make One Polygon From Points Make One PolyLine From Points Conv