EPSG systems

EPSG:27398 NGO 1948 (Oslo) / NGO zone VIII

Projected system (Transverse Mercator) in use: Norway - zone VIII. The full definition below, and conversion in one click.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:27398
NameNGO 1948 (Oslo) / NGO zone VIII
TypeProjected system — Transverse Mercator
Area of use Norway - zone VIII
Norway - east of 16°15'E of Oslo (26°58'22.5"E of Greenwich).
Bounds W 26,97° · S 69,02° · E 31,32° · N 71,19°
Countries Norway
DatumNGO 1948 (Oslo)
Ellipsoid Bessel Modified a = 6377492.018 m · 1/f = 299.1528128
Prime meridianOslo 10.722916666666666 degree
Base geographic system EPSG:4817 — NGO 1948 (Oslo)
Unit metre (x north, y east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeCadastre, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin58degree
Longitude of natural origin18.333333333333332degree
Scale factor at natural origin1unity
False easting0metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=58 +lon_0=18.3333333333333 +k=1 +x_0=0 +y_0=0 +a=6377492.018 +rf=299.1528128 +pm=oslo +units=m +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:27398.

WKT (ESRI format, the .prj content)

PROJCS["NGO_1948_Oslo_Norway_Zone_8",GEOGCS["GCS_NGO_1948_Oslo",DATUM["NGO_1948_(Oslo)",SPHEROID["Bessel_Modified",6377492.018,299.1528128]],PRIMEM["Oslo",10.7229166666667],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",18.3333333333333],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",58.0],UNIT["Meter",1.0]]

All systems — Norway

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