EPSG systems

EPSG:4806 Monte Mario (Rome)

Geographic system in latitude and longitude, in use: Italy - including San Marino and Vatican. 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.

Convert coordinates Open in Carte Download the .prj

System record
Code	EPSG:4806
Name	Monte Mario (Rome)
Type	Geographic system
Area of use	Italy - including San Marino and Vatican Italy - onshore and offshore; San Marino, Vatican City State.
Bounds	W 5,93° · S 34,76° · E 18,99° · N 47,10°
Countries	Italy
Datum	Monte Mario (Rome)
Ellipsoid	International 1924 a = 6378388 m · 1/f = 297
Prime meridian	Rome 12.452333333333332 degree
Unit	degree (Lat north, Lon east)
Transformation to WGS 84	No simple transformation published (ellipsoid alone)
Scope	Geodesy, onshore minerals management.

proj4 definition

+proj=longlat +ellps=intl +pm=rome +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:4806.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Monte_Mario_Rome",DATUM["Monte_Mario_(Rome)",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Rome",12.4523333333333],UNIT["Degree",0.0174532925199433]]

All systems — Italy

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

proj4 definition

WKT (ESRI format, the .prj content)

Other systems — Italy