Google, "heavenly"/"original" and Baidu coordinates I'm helping answer several questions on StackOverflow and GIS.SE regarding the unique coordinate system used in China, and its interaction with Baidu Maps.

While trying to machine translate the Baidu Map coordinates conversion API, I have these two strings:


google坐标转成百度坐标 - Convert Google coordinates into Baidu coordinates
原始坐标转成百度坐标 - Convert ??? coordinates into Baidu coordinates


I'm trying to understand what the second description refers to. The "real" GPS coordinates (WSG-84), or the "original" i.e. approved by the State Council GCJ-02 coordinates?

Google uses WGS-84 coordinates, so I'm inclining to believe the second option, but I see no reference to GCJ-02.
It's seems to be GPS coordinates (WGS-84).

And yes, Google uses WGS-84 coordinates, but Google map uses State Council GCJ-02 coordinates in China.

So, 


google坐标转成百度坐标 : GCJ-02 TO BAIDU(GCJ-02 + BD09)
原始坐标转成百度坐标 : WGS-84 TO BAIDU(GCJ-02 + BD09)


Reference:
百度地图API详解之坐标系转换
GPS坐标换算为百度坐标
百度地图坐标转换（gps google 百度坐标相互转换）