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Name: Amersfoort to ED50 (1)
Remarks: Adopted by NAM in 2006, replacing polynomial tfms 1046, 6304, 1050 and 6306.
Information source: Shell / NAM
Revision date: 2026-01-06
Unit: metre
Geodetic CRS: Amersfoort
Datum: Amersfoort
Ellipsoid: Bessel 1841
Prime meridian: Greenwich
Data source: EPSG
Information source: NSGI: Netherlands Partnership of Kadaster, Rijkswaterstaat and Hydrographic Service, http://www.nsgi.nl/.
Revision date: 2026-01-06
Scope: Cadastre, engineering survey, topographic mapping.
Remarks: Replaces 28991 (RD Old). Since 2000-10-01 has been redefined as derived from ETRS89 by application of the official transformation RDNAPTRANS(TM). Since 2008 use has been extended from onshore to offshore through the RDNAPTRANS(TM) transformation.
Area of use: Netherlands - onshore and offshore.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (x,y). Orientations: east, north. UoM: m.
&stroke=red&width=2&path=50.75,2.53|55.77,2.53|55.77,7.22|50.75,7.22|50.75,2.53)
Center coordinates
120818.83 586060.32
Projected bounds:
-46622.03 306674.53
284347.25 869062.9
WGS84 bounds:
2.53 50.75
7.22 55.77
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ BOUNDCRS[ SOURCECRS[ PROJCRS["Amersfoort / RD New", BASEGEOGCRS["Amersfoort", DATUM["Amersfoort", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4289]], CONVERSION["RD New", METHOD["Oblique Stereographic", ID["EPSG",9809]], PARAMETER["Latitude of natural origin",52.1561605555556, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",5.38763888888889, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9999079, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",155000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",463000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["easting (x)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["northing (y)",north, ORDER[2], LENGTHUNIT["metre",1]], ID["EPSG",28992]]], TARGETCRS[ GEOGCRS["WGS 84", ENSEMBLE["World Geodetic System 1984 ensemble", MEMBER["World Geodetic System 1984 (Transit)"], MEMBER["World Geodetic System 1984 (G730)"], MEMBER["World Geodetic System 1984 (G873)"], MEMBER["World Geodetic System 1984 (G1150)"], MEMBER["World Geodetic System 1984 (G1674)"], MEMBER["World Geodetic System 1984 (G1762)"], MEMBER["World Geodetic System 1984 (G2139)"], MEMBER["World Geodetic System 1984 (G2296)"], ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]], ENSEMBLEACCURACY[2.0]], 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]], ID["EPSG",4326]]], ABRIDGEDTRANSFORMATION["Amersfoort to WGS 84 (2)", METHOD["Coordinate Frame rotation (geog2D domain)", ID["EPSG",9607]], PARAMETER["X-axis translation",565.04, ID["EPSG",8605]], PARAMETER["Y-axis translation",49.91, ID["EPSG",8606]], PARAMETER["Z-axis translation",465.84, ID["EPSG",8607]], PARAMETER["X-axis rotation",0.409394387439237, ID["EPSG",8608]], PARAMETER["Y-axis rotation",-0.359705195614311, ID["EPSG",8609]], PARAMETER["Z-axis rotation",1.86849100035057, ID["EPSG",8610]], PARAMETER["Scale difference",1.0000040772, ID["EPSG",8611]], ID["EPSG",1672]]]], TARGETCRS[ GEOGCRS["ED50", DATUM["European Datum 1950", ELLIPSOID["International 1924",6378388,297, 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["Geodesy."], AREA["Europe - west: Andorra; Cyprus; Denmark - onshore and offshore; Faroe Islands - onshore; France - offshore; Germany - offshore North Sea; Gibraltar; Greece - offshore; Israel - offshore; Italy including San Marino and Vatican City State; Ireland offshore; Malta; Netherlands - offshore; North Sea; Norway including Svalbard - onshore and offshore; Portugal - mainland - offshore; Spain - onshore; Türkiye (Turkey) - onshore and offshore; United Kingdom - UKCS offshore east of 6°W including Channel Islands (Guernsey and Jersey). Egypt - Western Desert; Iraq - onshore; Jordan."], BBOX[25.71,-16.1,84.73,48.61]], ID["EPSG",4230]]], ABRIDGEDTRANSFORMATION["Inverse of ED50 to WGS 84 (18)", METHOD["Inverse of Position Vector transformation (geog2D domain)", ID["INVERSE(EPSG)",9606]], PARAMETER["X-axis translation",-89.5, ID["EPSG",8605]], PARAMETER["Y-axis translation",-93.8, ID["EPSG",8606]], PARAMETER["Z-axis translation",-123.1, ID["EPSG",8607]], PARAMETER["X-axis rotation",0, ID["EPSG",8608]], PARAMETER["Y-axis rotation",0, ID["EPSG",8609]], PARAMETER["Z-axis rotation",-0.156, ID["EPSG",8610]], PARAMETER["Scale difference",1.0000012, ID["EPSG",8611]], USAGE[ SCOPE["Oil and gas exploration and production."], AREA["Denmark - offshore North Sea; Ireland - offshore; Netherlands - offshore; United Kingdom - UKCS offshore."], BBOX[47.42,-16.1,63.89,10.86]], ID["INVERSE(EPSG)",1311], REMARK["Recommended CT for UKCS and IrishCS petroleum purposes, known as ""Common Offshore"". Based on ED50 to WGS 72 (precise ephemeris) 6-nations agreement of 1981 with which precise to broadcast and broadcast to WGS 84 transformations have been concatenated."]]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:28992","+proj=sterea +lat_0=52.1561605555556 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.04,49.91,465.84,-0.409394387439237,0.359705195614311,-1.86849100035057,4.0772 +units=m +no_defs +type=crs");
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "Amersfoort / RD New", "base_crs": { "type": "GeographicCRS", "name": "Amersfoort", "datum": { "type": "GeodeticReferenceFrame", "name": "Amersfoort", "ellipsoid": { "name": "Bessel 1841", "semi_major_axis": 6377397.155, "inverse_flattening": 299.1528128 } }, "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": 4289 }, "remarks": "Use of geographic2D CRS Amersfoort (code 4289) for spatial referencing is discouraged. Use projected CRS Amersfoort / RD New (code 28992) or ETRS89-NLD [AGRS2010] (code 11037)." }, "conversion": { "name": "RD New", "method": { "name": "Oblique Stereographic", "id": { "authority": "EPSG", "code": 9809 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 52.1561605555556, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": 5.38763888888889, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.9999079, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 155000, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 463000, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "x", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "y", "direction": "north", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 28992 } }, "target_crs": { "type": "GeographicCRS", "name": "WGS 84", "datum_ensemble": { "name": "World Geodetic System 1984 ensemble", "members": [ { "name": "World Geodetic System 1984 (Transit)", "id": { "authority": "EPSG", "code": 1166 } }, { "name": "World Geodetic System 1984 (G730)", "id": { "authority": "EPSG", "code": 1152 } }, { "name": "World Geodetic System 1984 (G873)", "id": { "authority": "EPSG", "code": 1153 } }, { "name": "World Geodetic System 1984 (G1150)", "id": { "authority": "EPSG", "code": 1154 } }, { "name": "World Geodetic System 1984 (G1674)", "id": { "authority": "EPSG", "code": 1155 } }, { "name": "World Geodetic System 1984 (G1762)", "id": { "authority": "EPSG", "code": 1156 } }, { "name": "World Geodetic System 1984 (G2139)", "id": { "authority": "EPSG", "code": 1309 } }, { "name": "World Geodetic System 1984 (G2296)", "id": { "authority": "EPSG", "code": 1383 } } ], "ellipsoid": { "name": "WGS 84", "semi_major_axis": 6378137, "inverse_flattening": 298.257223563 }, "accuracy": "2.0", "id": { "authority": "EPSG", "code": 6326 } }, "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": 4326 } }, "transformation": { "name": "Amersfoort to WGS 84 (2)", "method": { "name": "Coordinate Frame rotation (geog2D domain)", "id": { "authority": "EPSG", "code": 9607 } }, "parameters": [ { "name": "X-axis translation", "value": 565.04, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": 49.91, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": 465.84, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 1.9848, "unit": { "type": "AngularUnit", "name": "microradian", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": -1.7439, "unit": { "type": "AngularUnit", "name": "microradian", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 9.0587, "unit": { "type": "AngularUnit", "name": "microradian", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 4.0772, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } } ], "id": { "authority": "EPSG", "code": 1672 } } }, "target_crs": { "type": "GeographicCRS", "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 } }, "transformation": { "name": "Inverse of ED50 to WGS 84 (18)", "source_crs": { "type": "GeographicCRS", "name": "WGS 84", "datum_ensemble": { "name": "World Geodetic System 1984 ensemble", "members": [ { "name": "World Geodetic System 1984 (Transit)", "id": { "authority": "EPSG", "code": 1166 } }, { "name": "World Geodetic System 1984 (G730)", "id": { "authority": "EPSG", "code": 1152 } }, { "name": "World Geodetic System 1984 (G873)", "id": { "authority": "EPSG", "code": 1153 } }, { "name": "World Geodetic System 1984 (G1150)", "id": { "authority": "EPSG", "code": 1154 } }, { "name": "World Geodetic System 1984 (G1674)", "id": { "authority": "EPSG", "code": 1155 } }, { "name": "World Geodetic System 1984 (G1762)", "id": { "authority": "EPSG", "code": 1156 } }, { "name": "World Geodetic System 1984 (G2139)", "id": { "authority": "EPSG", "code": 1309 } }, { "name": "World Geodetic System 1984 (G2296)", "id": { "authority": "EPSG", "code": 1383 } } ], "ellipsoid": { "name": "WGS 84", "semi_major_axis": 6378137, "inverse_flattening": 298.257223563 }, "accuracy": "2.0", "id": { "authority": "EPSG", "code": 6326 } }, "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": 4326 } }, "method": { "name": "Inverse of Position Vector transformation (geog2D domain)", "id": { "authority": "INVERSE(EPSG)", "code": 9606 } }, "parameters": [ { "name": "X-axis translation", "value": -89.5, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": -93.8, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": -123.1, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": -0.156, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 1.2, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } } ], "id": { "authority": "INVERSE(EPSG)", "code": 1311 } } }
Definition: MapServer - MAPfile
PROJECTION "proj=sterea" "lat_0=52.1561605555556" "lon_0=5.38763888888889" "k=0.9999079" "x_0=155000" "y_0=463000" "ellps=bessel" "towgs84=565.04,49.91,465.84,-0.409394387439237,0.359705195614311,-1.86849100035057,4.0772" "units=m" "no_defs" "type=crs" END
Definition: Mapnik
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