EPSG:4702 — Mauritania 1999
Mauritania 1999 (EPSG:4702) — a Geographic (degrees) system on the GRS80 datum, used in Mauritania. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to WGS…
At a glance
- EPSG
- 4702
- Name
- Mauritania 1999
- Kind
- Geographic (degrees)
- Family
- Geographic (longitude/latitude)
- Ellipsoid
- GRS80
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Mauritania
Area of use
| West | -20.04° |
| South | 14.72° |
| East | -4.80° |
| North | 27.30° |
Projection parameters
| Projection | longlat |
| Ellipsoid | GRS80 |
+proj=longlat +ellps=GRS80 +no_defs
GEOGCS["GCS_Mauritania 1999",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4702"]]
Sample conversion
Mauritania capital: WGS84 -15.95820, 18.07350 → EPSG:4702 -15.9582000, 18.0735000
Values are within ±0.1 m at the test point.
About the Geographic (longitude/latitude) family
Mauritania 1999 is a geographic coordinate system: positions are longitude and latitude in degrees on its reference ellipsoid, not metres on a plane. It is the datum layer that projected grids (UTM, national belts) are built upon.
Because it is unprojected, distances and areas cannot be measured directly from its degrees — convert to a metric projected system (or use a geodesic calculation) first. This page's converter does exactly that.
Related systems
- EPSG:3343 — Mauritania 1999 / UTM zone 28N
- EPSG:3344 — Mauritania 1999 / UTM zone 29N
- EPSG:3345 — Mauritania 1999 / UTM zone 30N
- EPSG:3367 — IGN Astro 1960 / UTM zone 28N
- EPSG:3368 — IGN Astro 1960 / UTM zone 29N
- EPSG:3369 — IGN Astro 1960 / UTM zone 30N
- EPSG:32628 — WGS 84 / UTM zone 28N
- EPSG:32629 — WGS 84 / UTM zone 29N
- EPSG:32630 — WGS 84 / UTM zone 30N
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