EPSG systems

EPSG:3027 RT38 2.5 gon V

Projected system (Transverse Mercator) in use: Sweden - 2.5 gon W. 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:3027
NameRT38 2.5 gon V
TypeProjected system — Transverse Mercator
Area of use Sweden - 2.5 gon W
Sweden - communes between approximately 14°40'E and 16°55'E. See information source for map.
Sweden - onshore
Bounds W 13,66° · S 55,95° · E 17,73° · N 67,18°
Countries Sweden
DatumStockholm 1938
Ellipsoid Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128
Base geographic system EPSG:4308 — RT38
Unit metre (X north, Y east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeCadastre, engineering survey, topographic mapping (large scale).; Topographic mapping (medium and small scale).

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin15.808277777777779degree
Scale factor at natural origin1unity
False easting1500000metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=0 +lon_0=15.8082777777778 +k=1 +x_0=1500000 +y_0=0 +ellps=bessel +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:3027.

WKT (ESRI format, the .prj content)

PROJCS["RT38_25_gon_V",GEOGCS["GCS_RT38",DATUM["D_Stockholm_1938",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",1500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",15.8082777777778],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Sweden

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