基用VC6.0 + MO实现的对二维地理信息的基本操作。数据加载、删除、查找，图层的放大、缩小显示隐藏，图表统计，柱状图、饼状图等-Base with VC6.0+ MO realize two-dimensional geographic information on the basic operation. Data load, delete, find, layers enlarge and narrow the display