是学习POSTGIS的入门笔记，附有截图。是入门级的最佳参考，当然也引用他人的一些材料。-It is to learn POSTGIS introductory notes, with a screenshot. The best reference is the entry-level, of course, also quoted some of the material to others.

arcgis ae 开发笔记 适合初学者-arcgis ae development notes for beginners