Google Maps采用的地图投影为Web Mercator,其优点为不同维度其形状保持不变,当然面积要发生变化。
ArcGIS9.3中可以直接设置为WGS 1984 Web Mercator,操作序列为:
Predefined > Projected Coordinate Systems > World > WGS 1984 Web Mercator
ArcGIS10中可以直接设置为WGS 1984 Web Mercator (Auxiliary Sphere) ,操作序列为:
Predefined > Projected Coordinate Systems > World > WGS 1984 Web Mercator (Auxiliary Sphere)
两者的区别见帮助解释如下:
The WGS 1984 Web Mercator (Auxiliary Sphere) coordinate system is an equivalent coordinate system that simplifies the datum transformations required for some datasets.
Google Maps投影在ArcGIS中的设置,布布扣,bubuko.com
原文:http://www.cnblogs.com/goodmangis/p/3787551.html