EPSG systems

EPSG:10268 Ostenfeld-IRF

Geographic system in latitude and longitude, in use: Denmark - northern Schleswig. Datum, ellipsoid and transformation to WGS 84 below.

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.

Convert coordinates Open in Carte Download the .prj

System record
Code	EPSG:10268
Name	Ostenfeld-IRF
Type	Geographic system
Area of use	Denmark - northern Schleswig Denmark - onshore northern Schleswig and surrounding islands (i.e. Jutland south of the pre-1920 border near the Kongea river).
Bounds	W 8,37° · S 54,80° · E 10,16° · N 55,47°
Countries	Denmark
Datum	Ostenfeld Intermediate Datum
Ellipsoid	Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128
Unit	degree (Lat north, Lon east)
Transformation to WGS 84	No simple transformation published (ellipsoid alone)
Scope	Intermediate stage in transformations - not used otherwise.

proj4 definition

+proj=longlat +ellps=bessel +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:10268.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Ostenfeld-IRF",DATUM["Ostenfeld_Intermediate_Datum",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Denmark

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

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — Denmark