EPSG:4815 Greek (Athens)
Geographic system in latitude and longitude, in use: Greece - 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:4815 |
|---|---|
| Name | Greek (Athens) |
| Type | Geographic system |
| Area of use | Greece - onshore |
| Bounds | W 19,57° · S 34,88° · E 28,30° · N 41,75° |
| Countries | Greece |
| Datum | Greek (Athens) |
| Ellipsoid | Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128 |
| Prime meridian | Athens 23.716337499999998 degree |
| Unit | degree (Lat north, Lon east) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Geodesy. |
proj4 definition
+proj=longlat +ellps=bessel +pm=athens +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:4815.
WKT (ESRI format, the .prj content)
GEOGCS["GCS_Greek_Athens",DATUM["Greek_(Athens)",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Athens",23.7163375],UNIT["Degree",0.0174532925199433]]Other systems — Greece
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.