Colombia Geoid Model of 2004

In Colombia, the Colombia Geoid Model of 2004 (GEOCOL04) relates the difference between the ellipsoid used by the Magna-Sirgas datum (GRS80) and a surface approximating mean sea level. The model data exist in a single binary file consisting of a 2-minute grid of elevation difference values between the two surfaces. The elevation differences at non-grid point locations are interpolated.

The "GEOCOL04" vertical transform has the following parameters:

The path parameter can either be fully qualified or relative to the location of the data source file in which it is defined. The path string should not end with a slash character.