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Method: NTv2
Grid Files: 35160622_47161840_E50_F89.gsb
Remarks: For the reverse transformation from IGM95 to ED50, iteration may be avoided by using an alternative grid file (35160622_47161840_F89_E50.gsb).
Information source: Istituto Geografico Militare (IGM), www.igmi.org
Revision date: 2021-05-13
Unit: metre
Geodetic CRS: ED50
Datum: European Datum 1950
Ellipsoid: International 1924
Prime meridian: Greenwich
Data source: EPSG
Revision date: 2005-05-27
Scope: Engineering survey, topographic mapping.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["ED50 / UTM zone 31N", BASEGEOGCRS["ED50", DATUM["European Datum 1950", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4230]], CONVERSION["UTM zone 31N", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",3, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["Europe - between 0°E and 6°E - Andorra; Denmark (North Sea); Germany offshore; Netherlands offshore; Norway including Svalbard - onshore and offshore; Spain - onshore (mainland and Balearic Islands); United Kingdom (UKCS) offshore."], BBOX[38.56,0,82.45,6.01]], ID["EPSG",23031]]], TARGETCRS[ GEOGCRS["IGM95", DATUM["Istituto Geografico Militaire 1995", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Horizontal component of 3D system."], AREA["Italy - onshore and offshore; San Marino, Vatican City State."], BBOX[34.76,5.93,47.1,18.99]], ID["EPSG",4670]]], ABRIDGEDTRANSFORMATION["ED50 to IGM95 (1)", METHOD["NTv2", ID["EPSG",9615]], PARAMETERFILE["Latitude and longitude difference file","35160622_47161840_E50_F89.gsb"], USAGE[ SCOPE["Transformation of coordinates at 0.2m level of accuracy."], AREA["Italy - onshore and offshore between 6°22'E and 18°40'E and north of 35°16'N; San Marino, Vatican City State."], BBOX[35.26,6.36,47.1,18.67]], ID["EPSG",9735], REMARK["For the reverse transformation from IGM95 to ED50, iteration may be avoided by using an alternative grid file (35160622_47161840_F89_E50.gsb)."]]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "ED50 / UTM zone 31N", "base_crs": { "name": "ED50", "datum": { "type": "GeodeticReferenceFrame", "name": "European Datum 1950", "ellipsoid": { "name": "International 1924", "semi_major_axis": 6378388, "inverse_flattening": 297 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4230 } }, "conversion": { "name": "UTM zone 31N", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 0, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": 3, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.9996, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 500000, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 0, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 23031 } }, "target_crs": { "type": "GeographicCRS", "name": "IGM95", "datum": { "type": "GeodeticReferenceFrame", "name": "Istituto Geografico Militaire 1995", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4670 } }, "transformation": { "name": "ED50 to IGM95 (1)", "method": { "name": "NTv2", "id": { "authority": "EPSG", "code": 9615 } }, "parameters": [ { "name": "Latitude and longitude difference file", "value": "35160622_47161840_E50_F89.gsb", "id": { "authority": "EPSG", "code": 8656 } } ], "id": { "authority": "EPSG", "code": 9735 } } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=utm +zone=31 +ellps=intl +units=m +no_defs +type=crs"> <Layer srs="+proj=utm +zone=31 +ellps=intl +units=m +no_defs +type=crs"> </Layer> </Map>
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