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Geodetic CRS: Ammassalik 1958
Datum: Ammassalik 1958
Ellipsoid: International 1924
Prime meridian: Greenwich
Data source: EPSG
Information source: GeoNote 13: "GR96", Danish Agency for Climate Data, https://www.klimadatastyrelsen.dk/
Revision date: 2025-07-15
Scope: Spatial referencing.
Remarks: Determined through the GR96(1996) coordinates of 34 points, standard deviation 0.2m. Replaces Ammassalik 1958 to GR96 (1) (code 15900).
Method: Coordinate Frame rotation (geog2D domain)
Area of use: Greenland - Ammassalik area onshore.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["Ammassalik 1958 to GR96 (2)", VERSION["KDS-Grl 2021"], SOURCECRS[ GEOGCRS["Ammassalik 1958", DATUM["Ammassalik 1958", 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]], ID["EPSG",4196]]], TARGETCRS[ GEOGCRS["GR96", ENSEMBLE["Greenland Reference 1996 ensemble", MEMBER["Greenland Reference 1996 (1996)"], MEMBER["Greenland Reference 1996 (2021)"], ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ENSEMBLEACCURACY[0.25]], 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",4747]]], METHOD["Coordinate Frame rotation (geog2D domain)", ID["EPSG",9607]], PARAMETER["X-axis translation",308.9415, LENGTHUNIT["metre",1], ID["EPSG",8605]], PARAMETER["Y-axis translation",136.202, LENGTHUNIT["metre",1], ID["EPSG",8606]], PARAMETER["Z-axis translation",986.3661, LENGTHUNIT["metre",1], ID["EPSG",8607]], PARAMETER["X-axis rotation",-3.8742, ANGLEUNIT["arc-second",4.84813681109536E-06], ID["EPSG",8608]], PARAMETER["Y-axis rotation",3.77827, ANGLEUNIT["arc-second",4.84813681109536E-06], ID["EPSG",8609]], PARAMETER["Z-axis rotation",-7.61345, ANGLEUNIT["arc-second",4.84813681109536E-06], ID["EPSG",8610]], PARAMETER["Scale difference",-171.67315, SCALEUNIT["parts per million",1E-06], ID["EPSG",8611]], OPERATIONACCURACY[0.4], USAGE[ SCOPE["Spatial referencing."], AREA["Greenland - Ammassalik area onshore."], BBOX[65.52,-38.86,65.91,-36.81]], ID["EPSG",10961], REMARK["Determined through the GR96(1996) coordinates of 34 points, standard deviation 0.2m. Replaces Ammassalik 1958 to GR96 (1) (code 15900)."]]
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=intl +step +proj=helmert +x=308.9415 +y=136.202 +z=986.3661 +rx=-3.8742 +ry=3.77827 +rz=-7.61345 +s=-171.67315 +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:10961","+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=intl +step +proj=helmert +x=308.9415 +y=136.202 +z=986.3661 +rx=-3.8742 +ry=3.77827 +rz=-7.61345 +s=-171.67315 +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": "Ammassalik 1958 to GR96 (2)", "source_crs": { "type": "GeographicCRS", "name": "Ammassalik 1958", "datum": { "type": "GeodeticReferenceFrame", "name": "Ammassalik 1958", "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": 4196 } }, "target_crs": { "type": "GeographicCRS", "name": "GR96", "datum_ensemble": { "name": "Greenland Reference 1996 ensemble", "members": [ { "name": "Greenland Reference 1996 (1996)", "id": { "authority": "EPSG", "code": 1420 } }, { "name": "Greenland Reference 1996 (2021)", "id": { "authority": "EPSG", "code": 1419 } } ], "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 }, "accuracy": "0.25", "id": { "authority": "EPSG", "code": 1421 } }, "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": 4747 } }, "method": { "name": "Coordinate Frame rotation (geog2D domain)", "id": { "authority": "EPSG", "code": 9607 } }, "parameters": [ { "name": "X-axis translation", "value": 308.9415, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": 136.202, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": 986.3661, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": -3.8742, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 3.77827, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": -7.61345, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": -171.67315, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } } ], "accuracy": "0.4", "scope": "Spatial referencing.", "area": "Greenland - Ammassalik area onshore.", "bbox": { "south_latitude": 65.52, "west_longitude": -38.86, "north_latitude": 65.91, "east_longitude": -36.81 }, "id": { "authority": "EPSG", "code": 10961 }, "remarks": "Determined through the GR96(1996) coordinates of 34 points, standard deviation 0.2m. Replaces Ammassalik 1958 to GR96 (1) (code 15900)." }
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=intl" "step" "proj=helmert" "x=308.9415" "y=136.202" "z=986.3661" "rx=-3.8742" "ry=3.77827" "rz=-7.61345" "s=-171.67315" "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=intl +step +proj=helmert +x=308.9415 +y=136.202 +z=986.3661 +rx=-3.8742 +ry=3.77827 +rz=-7.61345 +s=-171.67315 +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=intl +step +proj=helmert +x=308.9415 +y=136.202 +z=986.3661 +rx=-3.8742 +ry=3.77827 +rz=-7.61345 +s=-171.67315 +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 ( 10961, 'EPSG', 10961, '+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=intl +step +proj=helmert +x=308.9415 +y=136.202 +z=986.3661 +rx=-3.8742 +ry=3.77827 +rz=-7.61345 +s=-171.67315 +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');
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