使用VC平台和SQL server实现一二一个基本的gis程序，使用对象编程思想，实现了一个小型gis系统。能操作图像数据，实现放大缩小复位功能-VC platform and SQL server to use to achieve 121 basic gis programs that use object programming ideas to achieve a small gis system. Can operate the image data to achieve zoom r