Module datum 

Structs

Datum

A geodetic datum, defined by a reference ellipsoid and its relationship to WGS84.

HelmertParams

7-parameter Helmert (Bursa-Wolf) transformation parameters.

Constants

ED50

ED50 datum (European Datum 1950).

ETRS89

ETRS89 datum (European Terrestrial Reference System 1989). Functionally identical to WGS84 for most purposes.

NAD27

NAD27 datum (Clarke 1866 ellipsoid). Helmert parameters from EPSG dataset (approximate continental US average).

NAD83

NAD83 datum (functionally identical to WGS84 for sub-meter work).

OSGB36

OSGB36 datum (Ordnance Survey Great Britain 1936).

PULKOVO1942

Pulkovo 1942 datum (used in Russia and former Soviet states).

TOKYO

Tokyo datum (used in Japan).

WGS84

WGS 84 datum.