Unit: metre
Data source: EPSG
Information source: Open GIS Consortium
Revision date: 2002-02-12
Orientation: up
Abbreviation: R
Axis order: 3..
Remarks: Used to avoid the singularity when the two angles in a 3D polar coordinate system lie in the same plane.
Coordinate system: Spherical 3D CS. Axes: latitude, longitude, radius. Orientations: north, east, up. UoM: degrees, degrees, metres.
Description: The distance from the (geocentric) coordinate system origin to a point. The third axis of a spherical coordinate system.