EPSG systems

EPSG:10265 KK-IRF

Geographic system in latitude and longitude, in use: Denmark - Copenhagen. 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.

System record
CodeEPSG:10265
NameKK-IRF
TypeGeographic system
Area of use Denmark - Copenhagen
Denmark - onshore - Copenhagen and surrounding area.
Bounds W 12,23° · S 55,51° · E 12,73° · N 55,82°
Countries Denmark
DatumCopenhagen Commune Intermediate Datum
Ellipsoid Danish 1876 a = 6377019.27 m · 1/f = 300
Unit degree (Lat north, Lon east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeIntermediate stage in transformations - not used otherwise.

proj4 definition

+proj=longlat +a=6377019.27 +rf=300 +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:10265.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_KK-IRF",DATUM["Copenhagen_Commune_Intermediate_Datum",SPHEROID["Danish_1876",6377019.27,300.0]],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.