EPSG:4289

Amersfoort

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Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Name: Amersfoort to WGS 84 (4)

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Parameter values from Amersfoort to ETRS89 (5) (tfm code 4830) assuming that ETRS89 is equivalent to WGS 84 within the accuracy of the transformation. Replaces Amersfoort to WGS 84 (3) (code 15934).

Information source: OGP

Revision date: 2026-07-21

Attributes

Unit: degree (supplier to define representation)

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, https://www.nsgi.nl/.

Revision date: 2026-07-21

Scope: Intermediate CRS in transformation to and from projected CRS.

Remarks: Use of this geographic2D CRS (Amersfoort, code 4289) for spatial referencing is discouraged. Use projected CRS RD (code 28992) or geodetic CRS ETRS89-NLD [AGRS2010] (codes 11035-11037).

Area of use: Netherlands - onshore and offshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
4.87 53.26

WGS84 bounds:
2.53 50.75
7.22 55.77

Netherlands - onshore and offshore.
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Definition: OGC Well Known Text

GEOGCS["Amersfoort",
    DATUM["Amersfoort",
        SPHEROID["Bessel 1841",6377397.155,299.1528128],
        TOWGS84[565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725]],
    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 and offshore."],
        BBOX[50.75,2.53,55.77,7.22]],
    ID["EPSG",4289],
    REMARK["Use of this geographic2D CRS (Amersfoort, code 4289) for spatial referencing is discouraged. Use projected CRS RD (code 28992) or geodetic CRS ETRS89-NLD [AGRS2010] (codes 11035-11037)."]]

Definition: ESRI Well Known Text

GEOGCS["GCS_Amersfoort",
    DATUM["D_Amersfoort",
        SPHEROID["Bessel_1841",6377397.155,299.1528128]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=bessel +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4289","+proj=longlat +ellps=bessel +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +no_defs +type=crs");

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 and offshore.",
    "bbox": {
        "south_latitude": 50.75,
        "west_longitude": 2.53,
        "north_latitude": 55.77,
        "east_longitude": 7.22
    },
    "id": {
        "authority": "EPSG",
        "code": 4289
    },
    "remarks": "Use of this geographic2D CRS (Amersfoort, code 4289) for spatial referencing is discouraged. Use projected CRS RD (code 28992) or geodetic CRS ETRS89-NLD [AGRS2010] (codes 11035-11037)."
}

Definition: GeoServer

4289=GEOGCS["Amersfoort",DATUM["Amersfoort",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4289"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=bessel"
	"towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=bessel +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=bessel +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +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 +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +no_defs +type=crs', 'GEOGCS["Amersfoort",DATUM["Amersfoort",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4289"]]');