Parameter values for step 1 from Amersfoort to ETRS89 (2) (code 1751). Step 2 assumes that ETRS89 is equivalent to WGS 84 within the accuracy of the transformation. Supersedes Amersfoort to WGS 84 (1) (code 1112).
OGP
2000-10-19
degree (supplier to define representation)
EPSG
NSGI: Netherlands Partnership of Kadaster, Rijkswaterstaat and Hydrographic Service, http://www.nsgi.nl/.
2020-08-31
Intermediate CRS in transformation to and from projected CRS.
Use of geographic2D CRS Amersfoort (code 4289) for spatial referencing is discouraged. Use projected CRS Amersfoort / RD New (code 28992).
Netherlands - onshore, including Waddenzee, Dutch Wadden Islands and 12-mile offshore coastal zone.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree
5.21 52.23
3.2 50.75
7.22 53.7
Definition: OGC Well Known Text
GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",6377397.155,299.1528128, AUTHORITY["EPSG","7004"]], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4289"]]
Definition: OGC Well Known Text 2 (2019)
GEOGCRS["Amersfoort", DATUM["Amersfoort", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, 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["Intermediate CRS in transformation to and from projected CRS."], AREA["Netherlands - onshore, including Waddenzee, Dutch Wadden Islands and 12-mile offshore coastal zone."], BBOX[50.75,3.2,53.7,7.22]], ID["EPSG",4289]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "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" } ] }, "scope": "Intermediate CRS in transformation to and from projected CRS.", "area": "Netherlands - onshore, including Waddenzee, Dutch Wadden Islands and 12-mile offshore coastal zone.", "bbox": { "south_latitude": 50.75, "west_longitude": 3.2, "north_latitude": 53.7, "east_longitude": 7.22 }, "id": { "authority": "EPSG", "code": 4289 } }
Definition: GeoServer
4289=GEOGCS["Amersfoort",DATUM["Amersfoort",SPHEROID["Bessel 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],AUTHORITY["EPSG","6289"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4289"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=longlat +ellps=bessel +no_defs +type=crs"> <Layer srs="+proj=longlat +ellps=bessel +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4289, 'EPSG', 4289, '+proj=longlat +ellps=bessel +no_defs +type=crs', 'GEOGCS["Amersfoort",DATUM["Amersfoort",SPHEROID["Bessel 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],AUTHORITY["EPSG","6289"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4289"]]');