EPSG:4700 IGN Astro 1960
Geographic system in latitude and longitude, in use: Mauritania - onshore. Datum, ellipsoid and transformation to WGS 84 below.
EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.
| Code | EPSG:4700 |
|---|---|
| Name | IGN Astro 1960 |
| Type | Geographic system |
| Area of use | Mauritania - onshore |
| Bounds | W -17,08° · S 14,72° · E -4,80° · N 27,30° |
| Countries | Mauritania |
| Datum | IGN Astro 1960 |
| Ellipsoid | Clarke 1880 (RGS) a = 6378249.145 m · 1/f = 293.465 |
| Unit | degree (Lat north, Lon east) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Minerals management (including oil and gas exploration and production). |
proj4 definition
+proj=longlat +a=6378249.145 +rf=293.465 +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:4700.
WKT (ESRI format, the .prj content)
GEOGCS["GCS_IGN_Astro_1960",DATUM["D_IGN_Astro_1960",SPHEROID["Clarke_1880_RGS",6378249.145,293.465]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]Other systems — Mauritania
- EPSG:3343Mauritania 1999 / UTM zone 28N
- EPSG:3344Mauritania 1999 / UTM zone 29N
- EPSG:3345Mauritania 1999 / UTM zone 30N
- EPSG:3367IGN Astro 1960 / UTM zone 28N
- EPSG:3368IGN Astro 1960 / UTM zone 29N
- EPSG:3369IGN Astro 1960 / UTM zone 30N
- EPSG:4679Jouik 1961
- EPSG:4680Nouakchott 1965
- EPSG:4702Mauritania 1999
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.