EPSG systems

EPSG:22281 Cape / Lo21

Projected system (Transverse Mercator (South Orientated)) in use: South Africa - 20°E to 22°E. The full definition below, and conversion in one click.

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System record
Code	EPSG:22281
Name	Cape / Lo21
Type	Projected system — Transverse Mercator (South Orientated)
Area of use	South Africa - 20°E to 22°E South Africa - onshore between 20°E and 22°E.
Bounds	W 19,99° · S -34,88° · E 22,01° · N -24,76°
Countries	South Africa
Datum	Cape
Ellipsoid	Clarke 1880 (Arc) a = 6378249.145 m · 1/f = 293.4663077
Base geographic system	EPSG:4222 — Cape
Unit	metre (Y west, X south)
Transformation to WGS 84	Cape to WGS 84 (1) (EPSG:1128) — accuracy 9 m
Scope	Cadastre, engineering survey, topographic mapping (large and medium scale).

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	0	degree
Longitude of natural origin	21	degree
Scale factor at natural origin	1	unity
False easting	0	metre
False northing	0	metre

proj4 definition

+proj=tmerc +axis=wsu +lat_0=0 +lon_0=21 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +units=m +towgs84=-136,-108,-292 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:22281.

WKT (ESRI format, the .prj content)

PROJCS["Cape_Lo21",GEOGCS["GCS_Cape",DATUM["D_Cape",SPHEROID["Clarke_1880_Arc",6378249.145,293.4663077]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator_South_Orientated"],PARAMETER["latitude_of_origin",0.0],PARAMETER["central_meridian",21.0],PARAMETER["scale_factor",1.0],PARAMETER["false_easting",0.0],PARAMETER["false_northing",0.0],UNIT["Meter",1.0]]

All systems — South Africa

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.

Projection parameters

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — South Africa