EPSG:21230 GSK-2011 / GSK 3GK zone 30
Projected system (Transverse Mercator) in use: Russia - 88.5°E to 91.5°E onshore. The full definition below, and conversion in one click.
| Code | EPSG:21230 |
|---|---|
| Name | GSK-2011 / GSK 3GK zone 30 |
| Type | Projected system — Transverse Mercator |
| Area of use |
Russia - 88.5°E to 91.5°E onshore Russian Federation - onshore between 88°30'E and 91°30'E. |
| Bounds | W 88,50° · S 49,44° · E 91,50° · N 81,28° |
| 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 | Cadastre, engineering survey, topographic mapping (large scale). |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | 90 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 30250000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=90 +k=1 +x_0=30250000 +y_0=0 +a=6378136.5 +rf=298.2564151 +units=m +towgs84=0,0,0 +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:21230.
WKT (ESRI format, the .prj content)
PROJCS["GSK-2011_GSK_3GK_zone_30",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["Transverse_Mercator"],PARAMETER["False_Easting",30250000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",90.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — Russia
- EPSG:21221GSK-2011 / GSK 3GK zone 21
- EPSG:21222GSK-2011 / GSK 3GK zone 22
- EPSG:21223GSK-2011 / GSK 3GK zone 23
- EPSG:21224GSK-2011 / GSK 3GK zone 24
- EPSG:21225GSK-2011 / GSK 3GK zone 25
- EPSG:21226GSK-2011 / GSK 3GK zone 26
- EPSG:21227GSK-2011 / GSK 3GK zone 27
- EPSG:21228GSK-2011 / GSK 3GK zone 28
- EPSG:21229GSK-2011 / GSK 3GK zone 29
- EPSG:21231GSK-2011 / GSK 3GK zone 31
- EPSG:21232GSK-2011 / GSK 3GK zone 32
- EPSG:21233GSK-2011 / GSK 3GK zone 33
- EPSG:21234GSK-2011 / GSK 3GK zone 34
- EPSG:21235GSK-2011 / GSK 3GK zone 35
- EPSG:21236GSK-2011 / GSK 3GK zone 36
- EPSG:21237GSK-2011 / GSK 3GK zone 37
- EPSG:21238GSK-2011 / GSK 3GK zone 38
- EPSG:21239GSK-2011 / GSK 3GK zone 39
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.