Leica GPS900 Series, Technical Reference Manual

Page: 79 / 287

Managing, Creating, Editing Coord Systems GPS900 79
following table. Any suitable geoid model can be combined with a geodetic CSCS model.
Refer to the online help of LGO for more information on CSCS models.
CSCS field file CSCS field files may be used in the field. They are extracted from the main CSCS model, which
may be too big to fit on the instrument.
Type Description
Grid 1. Determination of preliminary grid coordinates by applying the specified
transformation, ellipsoid and map projection.
2. Determination of the final local grid coordinates by applying a shift in
Easting and Northing interpolated in the grid file of the CSCS model.
Cartesian 1. Performing the specified transformation.
2. Determination of local cartesian coordinates by applying a 3D shift
interpolated in the grid file of the CSCS model.
3. Determination of the final local grid coordinates by applying the speci-
fied local ellipsoid and map projection.
Geodetic 1. Determination of local geodetic coordinates by applying a correction in
latitude and longitude interpolated from the file of the CSCS model.
2. Determination of the final local grid coordinates by applying the local
map projection.
)
Using a geodetic CSCS model excludes the use of a transformation in
a coordinate system.