< 矢量图形系统开发与编程>>一书的配套光盘，包括了一个矢量图形系统和一个GIS系统的源码-< < Vector graphics system development and programming> > 1 book matching CD-ROM, including a vector graphics system and a GIS system source code

GIS简单的图形系统，可以兼容DWG等矢量数据-GIS simple graphical system that is compatible with DWG vector data, etc.