Geodetic data Grid eXchange Format (GGXF)

The Geodetic data Grid eXchange Format (GGXF) is designed to be a single file format that may be used for a wide range of geodetic applications requiring interpolation of regularly gridded data, including (but not limited to):

• • Transformation of latitude and longitude coordinates from one geodetic coordinate reference system to another;

• • Transformation of gravity-related heights from one vertical coordinate reference system to another;

• • Reduction of ellipsoid heights to the geoid, quasi-geoid or a surface of a vertical reference frame; and

• • The description of coordinate changes due to deformation.

The GGXF format has been designed specifically for carrying gridded geodetic parameters supporting coordinate transformation.