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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. Because the difference between coordinates referenced to NKG_ETRF14 and coordinates referenced to ETRS89-NO EUREF89 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14 any realization of ETRS89 (including ETRF2014 and ETRS89-NO EUREF89) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9.
Method: Geocen translations by grid (gtg) & Geocen translations NEU velocities (gtg)
Area of use: Norway - onshore.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["NKG_ETRF14 to ETRS89-NOR [EUREF89] (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["ETRS89-NOR [EUREF89]", DATUM["ETRS89-NOR [EUREF89]", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[1995]], 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",10873]]], METHOD["Geocen translations by grid (gtg) & Geocen translations NEU velocities (gtg)", ID["EPSG",1142]], PARAMETERFILE["Geocentric translation file","no_kv_NKGETRF14_EPSG7922_2000.tif"], PARAMETERFILE["Point motion velocity grid file","NKG_RF17vel.tif"], PARAMETER["Source epoch",2000, TIMEUNIT["year",31556925.445], ID["EPSG",1068]], PARAMETER["Target epoch",1995, TIMEUNIT["year",31556925.445], ID["EPSG",1069]], 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[0.005], USAGE[ SCOPE["Geodesy."], AREA["Norway - onshore."], BBOX[57.9,4.39,71.24,31.32]], ID["EPSG",10811], REMARK["Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation. Because the difference between coordinates referenced to NKG_ETRF14 and coordinates referenced to ETRS89-NO EUREF89 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14 any realization of ETRS89 (including ETRF2014 and ETRS89-NO EUREF89) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9."]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "NKG_ETRF14 to ETRS89-NOR [EUREF89] (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": "ETRS89-NOR [EUREF89]", "datum": { "type": "GeodeticReferenceFrame", "name": "ETRS89-NOR [EUREF89]", "anchor_epoch": 1995, "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": 10873 } }, "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": "Geocen translations by grid (gtg) & Geocen translations NEU velocities (gtg)", "id": { "authority": "EPSG", "code": 1142 } }, "parameters": [ { "name": "Geocentric translation file", "value": "no_kv_NKGETRF14_EPSG7922_2000.tif", "id": { "authority": "EPSG", "code": 8727 } }, { "name": "Point motion velocity grid file", "value": "NKG_RF17vel.tif", "id": { "authority": "EPSG", "code": 1050 } }, { "name": "Source epoch", "value": 2000, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1068 } }, { "name": "Target epoch", "value": 1995, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1069 } } ], "accuracy": "0.005", "scope": "Geodesy.", "area": "Norway - onshore.", "bbox": { "south_latitude": 57.9, "west_longitude": 4.39, "north_latitude": 71.24, "east_longitude": 31.32 }, "id": { "authority": "EPSG", "code": 10811 }, "remarks": "Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation. Because the difference between coordinates referenced to NKG_ETRF14 and coordinates referenced to ETRS89-NO EUREF89 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14 any realization of ETRS89 (including ETRF2014 and ETRS89-NO EUREF89) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9." }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=pipeline +step +proj=xyzgridshift +grids=no_kv_NKGETRF14_EPSG7922_2000.tif +step +proj=deformation +dt=-5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80"> <Layer srs="+proj=pipeline +step +proj=xyzgridshift +grids=no_kv_NKGETRF14_EPSG7922_2000.tif +step +proj=deformation +dt=-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 ( 10811, 'EPSG', 10811, '+proj=pipeline +step +proj=xyzgridshift +grids=no_kv_NKGETRF14_EPSG7922_2000.tif +step +proj=deformation +dt=-5 +grids=eur_nkg_nkgrf17vel.tif +ellps=GRS80', 'None');
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