EPSG:2999 — Grand Comoros / UTM zone 38S
Grand Comoros / UTM zone 38S (EPSG:2999) — a Projected (metres) system on the intl datum, used in Comoros. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter…
At a glance
- EPSG
- 2999
- Name
- Grand Comoros / UTM zone 38S
- Kind
- Projected (metres)
- Family
- Universal Transverse Mercator (UTM)
- Ellipsoid
- intl
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Comoros
Area of use
| West | 43.16° |
| South | -11.99° |
| East | 43.55° |
| North | -11.31° |
Projection parameters
| Projection | utm |
| UTM zone | 38 |
| Southern hemisphere | ✓ |
| Ellipsoid | intl |
| Units | m |
| Helmert shift to WGS84 | -963,510,-359,0,0,0,0 |
+proj=utm +zone=38 +south +ellps=intl +units=m +no_defs +towgs84=-963,510,-359,0,0,0,0
PROJCS["Grand Comoros / UTM zone 38S",GEOGCS["GCS_Grand Comoros / UTM zone 38S",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297],TOWGS84[-963,510,-359,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000],PARAMETER["False_Northing",10000000],PARAMETER["Central_Meridian",45],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","2999"]]
Sample conversion
Centre of the area of use: WGS84 43.35500, -11.65000 → EPSG:2999 319634.991, 8711993.778
Values are within ±0.1 m at the test point.
About the Universal Transverse Mercator (UTM) family
Grand Comoros / UTM zone 38S is a Universal Transverse Mercator zone — a 6°-wide belt of the worldwide UTM system, in metres, centred on a meridian carefully chosen so distortion stays low across the zone. It is the everyday working grid for GPS-derived surveying in Comoros.
The classic field mistake with UTM is using the wrong zone: a point one zone away is easily hundreds of kilometres off. Always confirm the zone number (and the hemisphere) before importing coordinates, and remember that UTM eastings are offset by a 500 km false easting so they never go negative.
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