VB+MO实用开发例子：第一章：GIS开发简介；第二章：MO/VB二次开发入门；第三章：使用地图和图层，有详细的说明和例子；第四章：坐标系和几何对象；全书共九章，pdf格式。-VB+ MO practical development examples: First Chapter: GIS development profile Chapter: MO/VB secondary development of entry Chapter III: Using maps and layers,

在认识的基础上进行逐步抽象，最后得到数字化的空间数据，这正是OpenGIS九层抽象模型前五层所描述的内容。最后是空间数据库模型，进一步强调了该抽象过程。 本章的内容有助于加深对空间数据和空间信息的理解。 -On the basis of the gradual understanding of the abstract, the resulting digital spatial data, which is nine OpenGIS abstract model described i

shp格式的中国地图，包括九段线和南海诸岛(SHP map of China, including nine sections of the line and the South China Sea Islands)

非常好用的中国省级区域矢量区划地图，含南海九段线哦(A very easy-to-use map of china's provincial-level regional vector zoning, including the nine-segment lines of the south china sea)