资料备份 2004/12/21

1  http://digitalearth.org/section/news  数字地球网站, 不少好东西   
2 http://www.terracopter.com/Downloads 上面有部分原代码, 这个东东可以
   Terracopter is a real-time fly-through 3D viewer for digital map data. If you have map data that you would like to view in a more  
   realistic way than is possible in traditional 2D applications, Terracopter might be useful for you.
3 http://www.opengeospatial.org  OpenGis 组织， 包括opengis规范等许多文档
4 http://www.enet.com.cn/msdn/inforcenter/A20040809331910.html  VC.net 使用技巧