These and many other commercial free data sources use the spherical Mercator data projection (identified by European Petroleum Survey Group [EPSG] code 900913).
这二者以及很多其他的商业的免费数据源都会使用球形的 Mercator 数据投影(由 European Petroleum Survey Group [EPSG] code 900913 标识)。
2
Lifting your astral arms free is good practise for projection. Later, you will use these astral arms to pull your astral body free of the physical.