R软件中的地图工具，压缩包内附使用说明。-R map software tools, compressed package containing instructions for use.

This mex-file reads SHPT_POINT, SHPT_MULTIPOINT, SHPT_ARC, and SHPT_POLYGON shapefiles into structures. Other requirements： Requires shapelib (http://shapelib.maptools.org). -This mex-file reads SHPT_POINT, SHPT_MULTIPOINT, SHPT_ARC, and SHP