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Geodetic CRS: NKG_ETRF14
Datum: Nordic Geodetic Commission ETRF14
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Häkli et al., "NKG2020 transformation: An updated transformation between dynamic and static reference frames in the Nordic and Baltic countries"; Journal of Geodetic Science 2023; 13: 20220155, https://doi.org/10.1515/jogs-2022-0155.
Revision date: 2025-08-24
Scope: Geodesy.
Remarks: Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation, but for coordinates originating before 2021-02-07 the NKG2008 transformation should be used. Because the difference in coordinates between NKG_ETRF14 and SWEREF99 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14, any realization of ETRS89 (including ETRF2014 and SWEREF99) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9.
Method: Position Vector (geocen) & Geocen translations NEU velocities (gtg)
Area of use: Sweden - onshore and offshore.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["NKG_ETRF14 to SWEREF99 (1)", VERSION["NKG2020"], SOURCECRS[ GEODCRS["NKG_ETRF14", DATUM["Nordic Geodetic Commission ETRF14", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2000]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[Cartesian,3], AXIS["(X)",geocentricX, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(Y)",geocentricY, ORDER[2], LENGTHUNIT["metre",1]], AXIS["(Z)",geocentricZ, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",10805]]], TARGETCRS[ GEODCRS["SWEREF99", DATUM["SWEREF99", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[Cartesian,3], AXIS["(X)",geocentricX, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(Y)",geocentricY, ORDER[2], LENGTHUNIT["metre",1]], AXIS["(Z)",geocentricZ, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",4976]]], METHOD["Position Vector (geocen) & Geocen translations NEU velocities (gtg)", ID["EPSG",1143]], PARAMETER["X-axis translation",0.03054, LENGTHUNIT["metre",1], ID["EPSG",8605]], PARAMETER["Y-axis translation",0.04606, LENGTHUNIT["metre",1], ID["EPSG",8606]], PARAMETER["Z-axis translation",-0.07944, LENGTHUNIT["metre",1], ID["EPSG",8607]], PARAMETER["X-axis rotation",1.41958, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8608]], PARAMETER["Y-axis rotation",0.15132, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8609]], PARAMETER["Z-axis rotation",1.50337, ANGLEUNIT["milliarc-second",4.84813681109536E-09], ID["EPSG",8610]], PARAMETER["Scale difference",3.002, SCALEUNIT["parts per billion",1E-09], ID["EPSG",8611]], PARAMETER["Source epoch",2000, TIMEUNIT["year",31556925.445], ID["EPSG",1068]], PARAMETER["Target epoch",1999.5, TIMEUNIT["year",31556925.445], ID["EPSG",1069]], PARAMETERFILE["Point motion velocity grid file","NKG_RF17vel.tif"], INTERPOLATIONCRS[ GEOGCRS["NKG_ETRF14", DATUM["Nordic Geodetic Commission ETRF14", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2000]], 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]]]], OPERATIONACCURACY[0.001], USAGE[ SCOPE["Geodesy."], AREA["Sweden - onshore and offshore."], BBOX[54.96,10.03,69.07,24.17]], ID["EPSG",10813], REMARK["Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation, but for coordinates originating before 2021-02-07 the NKG2008 transformation should be used. Because the difference in coordinates between NKG_ETRF14 and SWEREF99 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14, any realization of ETRS89 (including ETRF2014 and SWEREF99) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9."]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:10813","+proj=pipeline +step +proj=helmert +x=0.03054 +y=0.04606 +z=-0.07944 +rx=0.00141958 +ry=0.00015132 +rz=0.00150337 +s=0.003002 +convention=position_vector +step +proj=deformation +dt=-0.5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80");
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "NKG_ETRF14 to SWEREF99 (1)", "source_crs": { "type": "GeodeticCRS", "name": "NKG_ETRF14", "datum": { "type": "GeodeticReferenceFrame", "name": "Nordic Geodetic Commission ETRF14", "anchor_epoch": 2000, "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Geocentric X", "abbreviation": "X", "direction": "geocentricX", "unit": "metre" }, { "name": "Geocentric Y", "abbreviation": "Y", "direction": "geocentricY", "unit": "metre" }, { "name": "Geocentric Z", "abbreviation": "Z", "direction": "geocentricZ", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 10805 } }, "target_crs": { "type": "GeodeticCRS", "name": "SWEREF99", "datum": { "type": "GeodeticReferenceFrame", "name": "SWEREF99", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Geocentric X", "abbreviation": "X", "direction": "geocentricX", "unit": "metre" }, { "name": "Geocentric Y", "abbreviation": "Y", "direction": "geocentricY", "unit": "metre" }, { "name": "Geocentric Z", "abbreviation": "Z", "direction": "geocentricZ", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 4976 } }, "interpolation_crs": { "type": "GeographicCRS", "name": "NKG_ETRF14", "datum": { "type": "GeodeticReferenceFrame", "name": "Nordic Geodetic Commission ETRF14", "anchor_epoch": 2000, "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": 10807 } }, "method": { "name": "Position Vector (geocen) & Geocen translations NEU velocities (gtg)", "id": { "authority": "EPSG", "code": 1143 } }, "parameters": [ { "name": "X-axis translation", "value": 0.03054, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": 0.04606, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": -0.07944, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 1.41958, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 0.15132, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 1.50337, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 3.002, "unit": { "type": "ScaleUnit", "name": "parts per billion", "conversion_factor": 1e-09 }, "id": { "authority": "EPSG", "code": 8611 } }, { "name": "Source epoch", "value": 2000, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1068 } }, { "name": "Target epoch", "value": 1999.5, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1069 } }, { "name": "Point motion velocity grid file", "value": "NKG_RF17vel.tif", "id": { "authority": "EPSG", "code": 1050 } } ], "accuracy": "0.001", "scope": "Geodesy.", "area": "Sweden - onshore and offshore.", "bbox": { "south_latitude": 54.96, "west_longitude": 10.03, "north_latitude": 69.07, "east_longitude": 24.17 }, "id": { "authority": "EPSG", "code": 10813 }, "remarks": "Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation, but for coordinates originating before 2021-02-07 the NKG2008 transformation should be used. Because the difference in coordinates between NKG_ETRF14 and SWEREF99 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14, any realization of ETRS89 (including ETRF2014 and SWEREF99) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9." }
Definition: MapServer - MAPfile
PROJECTION "proj=pipeline" "step" "proj=helmert" "x=0.03054" "y=0.04606" "z=-0.07944" "rx=0.00141958" "ry=0.00015132" "rz=0.00150337" "s=0.003002" "convention=position_vector" "step" "proj=deformation" "dt=-0.5" "grids=eur_nkg_nkgrf17vel.tif" "ellps=GRS80" END
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=pipeline +step +proj=helmert +x=0.03054 +y=0.04606 +z=-0.07944 +rx=0.00141958 +ry=0.00015132 +rz=0.00150337 +s=0.003002 +convention=position_vector +step +proj=deformation +dt=-0.5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80"> <Layer srs="+proj=pipeline +step +proj=helmert +x=0.03054 +y=0.04606 +z=-0.07944 +rx=0.00141958 +ry=0.00015132 +rz=0.00150337 +s=0.003002 +convention=position_vector +step +proj=deformation +dt=-0.5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10813, 'EPSG', 10813, '+proj=pipeline +step +proj=helmert +x=0.03054 +y=0.04606 +z=-0.07944 +rx=0.00141958 +ry=0.00015132 +rz=0.00150337 +s=0.003002 +convention=position_vector +step +proj=deformation +dt=-0.5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80', 'None');
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