EPSG systems

EPSG:4209 Arc 1950

Geographic system in latitude and longitude, in use: Africa - Botswana, Malawi, Zambia, Zimbabwe. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4209
NameArc 1950
TypeGeographic system
Area of use Africa - Botswana, Malawi, Zambia, Zimbabwe
Botswana; Malawi; Zambia; Zimbabwe.
Bounds W 19,99° · S -26,88° · E 35,93° · N -8,19°
Also covers Botswana, Malawi, Zambia, Zimbabwe
DatumArc 1950
Ellipsoid Clarke 1880 (Arc) a = 6378249.145 m · 1/f = 293.4663077
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Arc 1950 to WGS 84 (1) (EPSG:1113) — accuracy 44 m
ScopeGeodesy.

proj4 definition

+proj=longlat +a=6378249.145 +rf=293.4663077 +towgs84=-143,-90,-294 +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:4209.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Arc_1950",DATUM["D_Arc_1950",SPHEROID["Clarke_1880_Arc",6378249.145,293.4663077]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Botswana

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