EPSG:4206 — Agadez
Agadez (EPSG:4206) — a Geographic (degrees) system on the clrk80ign datum, used in Algeria. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to WGS84 and U…
At a glance
- EPSG
- 4206
- Name
- Agadez
- Kind
- Geographic (degrees)
- Family
- Geographic (longitude/latitude)
- Ellipsoid
- clrk80ign
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Algeria
Area of use
| West | 0.16° |
| South | 11.69° |
| East | 16.00° |
| North | 23.53° |
Projection parameters
| Projection | longlat |
| Ellipsoid | clrk80ign |
+proj=longlat +ellps=clrk80ign +no_defs
GEOGCS["GCS_Agadez",DATUM["D_Clarke_1880_IGN",SPHEROID["Clarke_1880_IGN",6378249.2,293.4660212936269]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4206"]]
Sample conversion
Centre of the area of use: WGS84 8.08000, 17.61000 → EPSG:4206 8.0800000, 17.6100000
Values are within ±0.1 m at the test point.
About the Geographic (longitude/latitude) family
Agadez 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:4304 — Voirol 1875
- EPSG:4307 — Nord Sahara 1959
- EPSG:4671 — Voirol 1879
- EPSG:10299 — RGSH2020
- EPSG:22229 — RGSH2020 / UTM zone 29N
- EPSG:22230 — RGSH2020 / UTM zone 30N
- EPSG:32629 — WGS 84 / UTM zone 29N
- EPSG:32630 — WGS 84 / UTM zone 30N
- EPSG:32631 — WGS 84 / UTM zone 31N
- EPSG:32632 — WGS 84 / UTM zone 32N
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