EPSG:9281

Amersfoort to ETRS89-NLD [AGRS2010] (8)

Attributes

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: 2025-12-25

Scope: Transformation of coordinates at 0.25m level of accuracy.

Remarks: Replaces Amersfoort to ETRS89 (5) and (6) (CT codes 4830 and 4831). Derived using ETRF2000. In official transformation used with an ellipsoidal height of 0m in Amersfoort or 43m in ETRS89 and with an additional correction grid (up to 0.25m).

Method: Coordinate Frame rotation (geog2D domain)

Area of use: Netherlands - onshore and offshore.

Description: (0,)

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Netherlands - onshore and offshore.

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["Amersfoort to ETRS89-NLD [AGRS2010] (8)",
    VERSION["IOGP-Nld 2018"],
    SOURCECRS[
        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]],
            ID["EPSG",4289]]],
    TARGETCRS[
        GEOGCRS["ETRS89-NLD [AGRS2010]",
            DATUM["AGRS2010 (ETRF2000)",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[2010.5]],
            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",11037]]],
    METHOD["Coordinate Frame rotation (geog2D domain)",
        ID["EPSG",9607]],
    PARAMETER["X-axis translation",565.7381,
        LENGTHUNIT["metre",1],
        ID["EPSG",8605]],
    PARAMETER["Y-axis translation",50.4018,
        LENGTHUNIT["metre",1],
        ID["EPSG",8606]],
    PARAMETER["Z-axis translation",465.2904,
        LENGTHUNIT["metre",1],
        ID["EPSG",8607]],
    PARAMETER["X-axis rotation",1.91514,
        ANGLEUNIT["microradian",1E-06],
        ID["EPSG",8608]],
    PARAMETER["Y-axis rotation",-1.60363,
        ANGLEUNIT["microradian",1E-06],
        ID["EPSG",8609]],
    PARAMETER["Z-axis rotation",9.09546,
        ANGLEUNIT["microradian",1E-06],
        ID["EPSG",8610]],
    PARAMETER["Scale difference",4.07244,
        SCALEUNIT["parts per million",1E-06],
        ID["EPSG",8611]],
    OPERATIONACCURACY[0.25],
    USAGE[
        SCOPE["Transformation of coordinates at 0.25m level of accuracy."],
        AREA["Netherlands - onshore and offshore."],
        BBOX[50.75,2.53,55.77,7.22]],
    ID["EPSG",9281],
    REMARK["Replaces Amersfoort to ETRS89 (5) and (6) (CT codes 4830 and 4831). Derived using ETRF2000. In official transformation used with an ellipsoidal height of 0m in Amersfoort or 43m in ETRS89 and with an additional correction grid (up to 0.25m)."]]

Definition: PROJ.4

+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=push +v_3 +step +proj=cart +ellps=bessel +step +proj=helmert +x=565.7381 +y=50.4018 +z=465.2904 +rx=0.395025981036064 +ry=-0.330772431242031 +rz=1.87607329462821 +s=4.07244 +convention=coordinate_frame +step +inv +proj=cart +ellps=GRS80 +step +proj=pop +v_3 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:9281","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=push +v_3 +step +proj=cart +ellps=bessel +step +proj=helmert +x=565.7381 +y=50.4018 +z=465.2904 +rx=0.395025981036064 +ry=-0.330772431242031 +rz=1.87607329462821 +s=4.07244 +convention=coordinate_frame +step +inv +proj=cart +ellps=GRS80 +step +proj=pop +v_3 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "Amersfoort to ETRS89-NLD [AGRS2010] (8)",
    "source_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)."
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "ETRS89-NLD [AGRS2010]",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "AGRS2010 (ETRF2000)",
            "anchor_epoch": 2010.5,
            "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": 11037
        },
        "remarks": "Horizontal component of national realization of ETRS89 in the Netherlands, aligned to ETRF2000."
    },
    "method": {
        "name": "Coordinate Frame rotation (geog2D domain)",
        "id": {
            "authority": "EPSG",
            "code": 9607
        }
    },
    "parameters": [
        {
            "name": "X-axis translation",
            "value": 565.7381,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8605
            }
        },
        {
            "name": "Y-axis translation",
            "value": 50.4018,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8606
            }
        },
        {
            "name": "Z-axis translation",
            "value": 465.2904,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8607
            }
        },
        {
            "name": "X-axis rotation",
            "value": 1.91514,
            "unit": {
                "type": "AngularUnit",
                "name": "microradian",
                "conversion_factor": 1e-06
            },
            "id": {
                "authority": "EPSG",
                "code": 8608
            }
        },
        {
            "name": "Y-axis rotation",
            "value": -1.60363,
            "unit": {
                "type": "AngularUnit",
                "name": "microradian",
                "conversion_factor": 1e-06
            },
            "id": {
                "authority": "EPSG",
                "code": 8609
            }
        },
        {
            "name": "Z-axis rotation",
            "value": 9.09546,
            "unit": {
                "type": "AngularUnit",
                "name": "microradian",
                "conversion_factor": 1e-06
            },
            "id": {
                "authority": "EPSG",
                "code": 8610
            }
        },
        {
            "name": "Scale difference",
            "value": 4.07244,
            "unit": {
                "type": "ScaleUnit",
                "name": "parts per million",
                "conversion_factor": 1e-06
            },
            "id": {
                "authority": "EPSG",
                "code": 8611
            }
        }
    ],
    "accuracy": "0.25",
    "scope": "Transformation of coordinates at 0.25m level of accuracy.",
    "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": 9281
    },
    "remarks": "Replaces Amersfoort to ETRS89 (5) and (6) (CT codes 4830 and 4831). Derived using ETRF2000. In official transformation used with an ellipsoidal height of 0m in Amersfoort or 43m in ETRS89 and with an additional correction grid (up to 0.25m)."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=pipeline"
	"step"
	"proj=axisswap"
	"order=2,1"
	"step"
	"proj=unitconvert"
	"xy_in=deg"
	"xy_out=rad"
	"step"
	"proj=push"
	"v_3"
	"step"
	"proj=cart"
	"ellps=bessel"
	"step"
	"proj=helmert"
	"x=565.7381"
	"y=50.4018"
	"z=465.2904"
	"rx=0.395025981036064"
	"ry=-0.330772431242031"
	"rz=1.87607329462821"
	"s=4.07244"
	"convention=coordinate_frame"
	"step"
	"inv"
	"proj=cart"
	"ellps=GRS80"
	"step"
	"proj=pop"
	"v_3"
	"step"
	"proj=unitconvert"
	"xy_in=rad"
	"xy_out=deg"
	"step"
	"proj=axisswap"
	"order=2,1"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=push +v_3 +step +proj=cart +ellps=bessel +step +proj=helmert +x=565.7381 +y=50.4018 +z=465.2904 +rx=0.395025981036064 +ry=-0.330772431242031 +rz=1.87607329462821 +s=4.07244 +convention=coordinate_frame +step +inv +proj=cart +ellps=GRS80 +step +proj=pop +v_3 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	<Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=push +v_3 +step +proj=cart +ellps=bessel +step +proj=helmert +x=565.7381 +y=50.4018 +z=465.2904 +rx=0.395025981036064 +ry=-0.330772431242031 +rz=1.87607329462821 +s=4.07244 +convention=coordinate_frame +step +inv +proj=cart +ellps=GRS80 +step +proj=pop +v_3 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9281, 'EPSG', 9281, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=push +v_3 +step +proj=cart +ellps=bessel +step +proj=helmert +x=565.7381 +y=50.4018 +z=465.2904 +rx=0.395025981036064 +ry=-0.330772431242031 +rz=1.87607329462821 +s=4.07244 +convention=coordinate_frame +step +inv +proj=cart +ellps=GRS80 +step +proj=pop +v_3 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');