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Convert Monte Mario to ED50

Convert coordinates from Monte Mario (EPSG:4265) to ED50 (EPSG:4230) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4265-to-epsg-4230

Official EPSG transformation from Monte Mario to ED50

The EPSG Geodetic Parameter Dataset defines 1 transformation between Monte Mario (EPSG:4265) and ED50 (EPSG:4230). Its parameters, accuracy and area of use are listed below.

Monte Mario to ED50 (1)

EPSG:9732±0.1 m
Method:
NTv2
Area of use:
Italy - 6°22'E to 18°40'E and north of 35°16'N; San Marino, Vatican City State
Scope:
Transformation of coordinates at 0.1m level of accuracy.

Grid file: 35160622_47161840_R40_E50.gsb

For the reverse transformation from ED50 to Monte Mario, iteration may be avoided by using an alternative grid file (35160622_47161840_E50_R40.gsb).

Convert EPSG:4265 to EPSG:4230 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4265", "EPSG:4230", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4265 — Monte Mario

geographic system using latitude and longitude on an ellipsoid · Area of use: Italy - including San Marino and Vatican

+proj=longlat +ellps=intl +no_defs +type=crs
More about EPSG:4265 →

Target: EPSG:4230 — ED50

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - ED50 by country

+proj=longlat +ellps=intl +no_defs +type=crs
More about EPSG:4230 →

Frequently asked questions

How accurate is converting Monte Mario to ED50?
The most accurate official EPSG transformation between these systems is accurate to about ±0.1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) in a desktop GIS.
Does my data leave the browser when I use this converter?
No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.
Need the reverse? Convert EPSG:4230 to EPSG:4265 →