EPSG:27391 NGO 1948 (Oslo) / NGO zone I
Projected system (Transverse Mercator) in use: Norway - zone I. 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.
| Code | EPSG:27391 |
|---|---|
| Name | NGO 1948 (Oslo) / NGO zone I |
| Type | Projected system — Transverse Mercator |
| Area of use |
Norway - zone I Norway - west of 3°30'W of Oslo (7°13'22.5"E of Greenwich). |
| Bounds | W 4,39° · S 57,92° · E 7,23° · N 63,17° |
| Countries | Norway |
| Datum | NGO 1948 (Oslo) |
| Ellipsoid | Bessel Modified a = 6377492.018 m · 1/f = 299.1528128 |
| Prime meridian | Oslo 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) |
| Scope | Cadastre, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 58 | degree |
| Longitude of natural origin | -4.666666666666667 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 0 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=58 +lon_0=-4.66666666666667 +k=1 +x_0=0 +y_0=0 +a=6377492.018 +rf=299.1528128 +pm=oslo +units=m +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:27391.
WKT (ESRI format, the .prj content)
PROJCS["NGO_1948_Oslo_Norway_Zone_1",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",-4.66666666666667],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",58.0],UNIT["Meter",1.0]]Other systems — Norway
- EPSG:5126ETRS89 / NTM zone 26
- EPSG:5127ETRS89 / NTM zone 27
- EPSG:5128ETRS89 / NTM zone 28
- EPSG:5129ETRS89 / NTM zone 29
- EPSG:5130ETRS89 / NTM zone 30
- EPSG:6070ETRS89 / EPSG Arctic zone 3-11
- EPSG:23034ED50 / UTM zone 34N
- EPSG:23037ED50 / UTM zone 37N
- EPSG:25835ETRS89 / UTM zone 35N
- EPSG:25836ETRS89 / UTM zone 36N
- EPSG:25837ETRS89 / UTM zone 37N
- EPSG:27392NGO 1948 (Oslo) / NGO zone II
- EPSG:27393NGO 1948 (Oslo) / NGO zone III
- EPSG:27394NGO 1948 (Oslo) / NGO zone IV
- EPSG:27395NGO 1948 (Oslo) / NGO zone V
- EPSG:27396NGO 1948 (Oslo) / NGO zone VI
- EPSG:27397NGO 1948 (Oslo) / NGO zone VII
- EPSG:27398NGO 1948 (Oslo) / NGO zone VIII
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.