EPSG systems

EPSG:4273 NGO 1948

Geographic system in latitude and longitude, in use: Norway - onshore. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4273
NameNGO 1948
TypeGeographic system
Area of use Norway - onshore
Bounds W 4,39° · S 57,90° · E 31,32° · N 71,24°
Countries Norway
DatumNGO 1948
Ellipsoid Bessel Modified a = 6377492.018 m · 1/f = 299.1528128
Unit degree (Lat north, Lon east)
Transformation to WGS 84 NGO 1948 to WGS 84 (1) (EPSG:1654) — accuracy 3 m
ScopeGeodesy.

proj4 definition

+proj=longlat +a=6377492.018 +rf=299.1528128 +towgs84=278.3,93,474.5,7.889,0.05,-6.61,6.21 +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:4273.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_NGO_1948",DATUM["D_NGO_1948",SPHEROID["Bessel_Modified",6377492.018,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Norway

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