EPSG systems

EPSG:4810 Tananarive (Paris)

Geographic system in latitude and longitude, in use: Madagascar - 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.

System record
CodeEPSG:4810
NameTananarive (Paris)
TypeGeographic system
Area of use Madagascar - onshore
Bounds W 43,18° · S -25,64° · E 50,56° · N -11,89°
Countries Madagascar
DatumTananarive 1925 (Paris)
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Prime meridianParis 2.5969213 grad
Unit grad (Lat north, Lon east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=intl +pm=paris +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:4810.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Tananarive_1925_Paris",DATUM["Tananarive_1925_(Paris)",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Paris",2.33722917],UNIT["Grad",0.0157079632679489]]

All systems — Madagascar

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.