EPSG systems

EPSG:21005 GSK-2011 / Gauss-Kruger CM 27E

Projected system (Transverse Mercator) in use: Russia - 24°E to 30°E onshore. The full definition below, and conversion in one click.

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System record
Code	EPSG:21005
Name	GSK-2011 / Gauss-Kruger CM 27E
Type	Projected system — Transverse Mercator
Area of use	Russia - 24°E to 30°E onshore Russian Federation - onshore between 24°E and 30°E.
Bounds	W 26,61° · S 55,69° · E 30,00° · N 69,47°
Countries	Russia
Datum	Geodezicheskaya Sistema Koordinat 2011
Ellipsoid	GSK-2011 a = 6378136.5 m · 1/f = 298.2564151
Base geographic system	EPSG:7683 — GSK-2011
Unit	metre (X north, Y east)
Transformation to WGS 84	GSK-2011 to WGS 84 (1) (EPSG:9773) — accuracy 1 m
Scope	Topographic mapping (medium scale).

Projection parameters

Parameter	Value	Unit
Latitude of natural origin	0	degree
Longitude of natural origin	27	degree
Scale factor at natural origin	1	unity
False easting	500000	metre
False northing	0	metre

proj4 definition

+proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=500000 +y_0=0 +a=6378136.5 +rf=298.2564151 +units=m +towgs84=0,0,0 +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:21005.

WKT (ESRI format, the .prj content)

PROJCS["GSK-2011_Gauss-Kruger_CM_27E",GEOGCS["GCS_GSK-2011",DATUM["Geodezicheskaya_Sistema_Koordinat_2011",SPHEROID["GSK-2011",6378136.5,298.2564151]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Gauss_Kruger"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",27.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Russia

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

Projection parameters

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — Russia