CoordSys

Description

Name: struct Tinman.Georef.CoordSys
Used by: Box.georef / Checkerboard.georef / Circle.georef / Conversion.source / Conversion.target / EPSG.georef / Geometry.georef / Group.georef / Set.georef / Shape.Georef.georef / Shape.Info.georef / Tinman.Georef.coordSys

Describes a coordinate system for geo-referencing.

A 3D geographic coordinate system has the following axes:

X: Geodetic longitude
Angle from the prime meridian plane to the meridian plane passing through the given point, eastwards treated as positive.
Y: Geodetic latitude
Angle from the equatorial plane to the perpendicular to the ellipsoid through a given point, northwards treated as positive.
Z: Ellipsoidal height
Distance of a point from the ellipsoid measured along the perpendicular from the ellipsoid to this point. Positive if upwards or outside of the ellipsoid.

A projected coordinate system has the following X and Y axes:

Vertical coordinate systems have a different Z axis, usually gravity-related height or depth.

The unique registry ID of well-known objects.

The human-readable name of this object.

The geodetic datum this coordinate system is based upon.

The map projection that translates between geographic coordinates (latitude, longitude) and map coordinates (easting, northing).

The vertical datum this coordinate system is based upon (null defaults to ellipsoid height).

The unit of measure used for geographic coordinates (null defaults to degrees).

The unit of measure used for projected coordinates (null defaults to metres).

The unit of measure used for local coordinates (null defaults to metres).

The unit of measure used for vertical coordinates (null defaults to metres).

The coordinate system flags.