Google Earth uses Simple Cylindrical projection with a WGS84 datum for its imagery base.
- Simple Cylindrical (Plate Carree) Projection
- Google Earth Image Base
Typically, the data you import into the Google Earth application is created with a specific geographic coordinate system, such as a Universal Transverse Mercator (UTM) projection and a NAD27 datum (North American Datum of 1927). Each geographic coordinate system may assign slightly different coordinates to the same location on the earth. When you import data into Google Earth, your data is interpreted according to the Google Earth coordinate system.
In the majority of cases, reprojection works as expected. In some situations, the transformation might not work properly. In that case, you can use a third-party tool to transform your data from its original coordinate system into the one used by Google Earth.