EPSG:4270 — Nahrwan 1967
Nahrwan 1967 (EPSG:4270) — a Geographic (degrees) system on the a=6378249.145 datum, used in United Arab Emirates. Parameters, proj4, WKT, accuracy ±0.6 m, plus a free c…
At a glance
- EPSG
- 4270
- Name
- Nahrwan 1967
- Kind
- Geographic (degrees)
- Family
- Geographic (longitude/latitude)
- Ellipsoid
- a=6378249.145
- Accuracy
- ±0.6 m (vs PROJ)
- Countries
- United Arab Emirates
Area of use
| West | 50.55° |
| South | 22.63° |
| East | 57.13° |
| North | 27.05° |
Projection parameters
| Projection | longlat |
| Semi-major axis | 6378249.145 |
| Inverse flattening | 293.465 |
| Helmert shift to WGS84 | -249,-156,381,0,0,0,0 |
+proj=longlat +a=6378249.145 +rf=293.465 +no_defs +towgs84=-249,-156,381,0,0,0,0
GEOGCS["GCS_Nahrwan 1967",DATUM["D_Custom_6378249.145",SPHEROID["Custom_6378249.145",6378249.145,293.465],TOWGS84[-249,-156,381,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4270"]]
Sample conversion
United Arab Emirates capital: WGS84 54.37730, 24.45390 → EPSG:4270 54.3761999, 24.4521261
Values are within ±0.6 m at the test point.
About the Geographic (longitude/latitude) family
Nahrwan 1967 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:4303 — TC(1948)
- EPSG:27039 — Nahrwan 1967 / UTM zone 39N
- EPSG:27040 — Nahrwan 1967 / UTM zone 40N
- EPSG:30339 — TC(1948) / UTM zone 39N
- EPSG:30340 — TC(1948) / UTM zone 40N
- EPSG:32639 — WGS 84 / UTM zone 39N
- EPSG:32640 — WGS 84 / UTM zone 40N
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