vc实现地图的基本操作，放大，缩小，漫游。读取一定控制格式的文本文件-vc map to achieve the basic operation, magnified, reduced, roaming. Must control the format to read a text file

vc编程读取dxf文件高程点数据，对离散点均匀化处理，并用delaunay逐点插入算法建网。-vc programming to read the dxf file elevation point data, the uniform treatment of discrete points, and delaunay incremental insertion algorithm of network construction.

ShapeFile文件读取的C++程序，使用VC+=6.0版本来实现的，-C++ program ShapeFile file read using VC+ =6.0 version to achieve,