EPSG:4313

BD72

Transform Get position on a map

Available transformations
to EPSG:11063
EPSG:11063 - ETRS89-BEL [BEREF2002]

Selected transformation

Name: BD72 to ETRS89-BEL [BEREF2002] (3)

Method: NTv2

Grid Files: bd72lb72_etrs89lb08.gsb

Remarks: File name is lower case and despite its name is between geographic CRSs. (Similarly-named file in upper case BD72LB72_ETRS89LB08 operates in projected CRS domain).

Information source: IGN Brussels www.ngi.be

Revision date: 2026-07-21

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: BD72

Datum: Reseau National Belge 1972

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: IGN Brussels.

Revision date: 2021-06-17

Scope: Geodesy.

Area of use: Belgium - onshore.

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

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SimpleMap

Center coordinates
4.45 50.51

WGS84 bounds:
2.5 49.5
6.4 51.51

Belgium - onshore.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["BD72",
            DATUM["Reseau National Belge 1972",
                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["Belgium - onshore."],
                BBOX[49.5,2.5,51.51,6.4]],
            ID["EPSG",4313]]],
    TARGETCRS[
        GEOGCRS["ETRS89-BEL [BEREF2002]",
            DATUM["Belgian Reference Frame 2002",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[2002.73]],
            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["Belgium - onshore and offshore."],
                BBOX[49.5,2.23,51.88,6.4]],
            ID["EPSG",11063],
            REMARK["Horizontal component of national realization of ETRS89 in Belgium. Replaced by BEREF2011 (CRS code 11215)."]]],
    ABRIDGEDTRANSFORMATION["BD72 to ETRS89-BEL [BEREF2002] (3)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","bd72lb72_etrs89lb08.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 0.01m level of accuracy."],
            AREA["Belgium - onshore."],
            BBOX[49.5,2.5,51.51,6.4]],
        ID["EPSG",11516],
        REMARK["File name is lower case and despite its name is between geographic CRSs. (Similarly-named file in upper case BD72LB72_ETRS89LB08 operates in projected CRS domain)."]]]

Definition: PROJ.4

+proj=longlat +ellps=intl +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4313","+proj=longlat +ellps=intl +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "BD72",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Reseau National Belge 1972",
            "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": 4313
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "ETRS89-BEL [BEREF2002]",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Belgian Reference Frame 2002",
            "anchor_epoch": 2002.73,
            "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": 11063
        },
        "remarks": "Horizontal component of national realization of ETRS89 in Belgium. Replaced by BEREF2011 (CRS code 11215)."
    },
    "transformation": {
        "name": "BD72 to ETRS89-BEL [BEREF2002] (3)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "bd72lb72_etrs89lb08.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 11516
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=intl"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=intl +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=intl +no_defs +type=crs">
	</Layer>
</Map>