Crs.ProjectFromGeocentricXYZ Method
Low-level method converting geocentric X, Y, Z directly to Easting, Northing, Height.
ProjectFromGeocentricXYZ(Point geocentricCartesianXYZ)
Low-level method converting geocentric X, Y, Z directly to Easting, Northing, Height.Syntax
public Point ProjectFromGeocentricXYZ (
Point geocentricCartesianXYZ
)Parameters
A point expressed in geocentric Cartesian X, Y, Z, in meters.
Return Value
The same point expressed in the Crs map projection plus height above ellipsoid.
Remarks
This is a low-level method. Its input is a point expressed in geocentric Cartesian coordinates in meters, usually written X, Y, and Z, where the origin is the center of the reference Ellipsoid. The positive Z axis goes through the north pole, the positive X axis goes through the PrimeMeridian, and the positive Y axis goes 90° east of the prime meridian. The method returns the same point expressed in projected coordinates x, y, and z. That is, x and y are projected (Easting and Northing) in the length unit of the projection, or longitude and latitude in degrees if the projection is LongLat, while z is the height in meters above the reference ellipsoid.
Geocentric Cartesian coordinates are mainly used internally by GIS systems and GPS receivers. They are not really fit for human consumption. In Carmenta Engine, a DataSet cannot store data in geocentric Cartesian coordinates, because a DataSet is queried with a two-dimensional rectangle, not a three-dimensional box.
Geocentric Cartesian coordinates are also known as ECEF coordinates (Earth-Centered, Earth-Fixed coordinates).
See also UnprojectToGeocentricXYZ.
Platforms
Windows, Linux, Android