EPSG:3312 CSG67 / UTM zone 21N
Projected system (Transverse Mercator) in use: French Guiana - coastal area west of 54°W. The full definition below, and conversion in one click.
| Code | EPSG:3312 |
|---|---|
| Name | CSG67 / UTM zone 21N |
| Type | Projected system — Transverse Mercator |
| Area of use | French Guiana - coastal area west of 54°W |
| Bounds | W -54,45° · S 4,84° · E -54,00° · N 5,69° |
| Countries | French Guiana |
| Datum | Centre Spatial Guyanais 1967 |
| Ellipsoid | International 1924 a = 6378388 m · 1/f = 297 |
| Base geographic system | EPSG:4623 — CSG67 |
| Unit | metre (E east, N north) |
| Transformation to WGS 84 | CSG67 to WGS 84 (1) (EPSG:1906) — accuracy 10 m |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | -57 | degree |
| Scale factor at natural origin | 0.9996 | unity |
| False easting | 500000 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=utm +zone=21 +ellps=intl +units=m +towgs84=-186,230,110 +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:3312.
WKT (ESRI format, the .prj content)
PROJCS["CSG_1967_UTM_Zone_21N",GEOGCS["GCS_CSG_1967",DATUM["D_CSG_1967",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-57.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — French Guiana
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.