Geodetic CRS: ITRF97
Datum: International Terrestrial Reference Frame 1997
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: International GNSS Service (IGS) via ISO Geodetic Registry.
Revision date: 2019-05-17
Scope: Geodesy.
Remarks: Scale difference in ppb where 1/billion = 1E-9 or nm/m. IGS97 is by definition aligned with ITRF97.
Method: Time-specific Position Vector transform (geocen)
Area of use: World.
Description: (0,)
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json", "type": "Transformation", "name": "ITRF97 to IGS97 (1)", "source_crs": { "type": "GeodeticCRS", "name": "ITRF97", "datum": { "type": "DynamicGeodeticReferenceFrame", "name": "International Terrestrial Reference Frame 1997", "frame_reference_epoch": 1997, "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": 4918 } }, "target_crs": { "type": "GeodeticCRS", "name": "IGS97", "datum": { "type": "DynamicGeodeticReferenceFrame", "name": "IGS97", "frame_reference_epoch": 1997, "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": 9001 } }, "method": { "name": "Time-specific Position Vector transform (geocen)", "id": { "authority": "EPSG", "code": 1065 } }, "parameters": [ { "name": "X-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "centimetre", "conversion_factor": 0.01 }, "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "centimetre", "conversion_factor": 0.01 }, "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": 0, "unit": { "type": "LinearUnit", "name": "centimetre", "conversion_factor": 0.01 }, "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "milliarc-second", "conversion_factor": 4.84813681109536e-09 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 0, "unit": { "type": "ScaleUnit", "name": "parts per billion", "conversion_factor": 1e-09 }, "id": { "authority": "EPSG", "code": 8611 } }, { "name": "Transformation reference epoch", "value": 1997, "unit": { "type": "TimeUnit", "name": "year", "conversion_factor": 31556925.445 }, "id": { "authority": "EPSG", "code": 1049 } } ], "accuracy": "0.0", "scope": "Geodesy.", "area": "World.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 9028 }, "remarks": "Scale difference in ppb where 1/billion = 1E-9 or nm/m. IGS97 is by definition aligned with ITRF97." }
Definition: OGC WKT 2 (2019)
COORDINATEOPERATION["ITRF97 to IGS97 (1)",VERSION["IGS-Wld"],SOURCECRS[GEODCRS["ITRF97",DYNAMIC[FRAMEEPOCH[1997]],DATUM["International Terrestrial Reference Frame 1997",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",4918]]],TARGETCRS[GEODCRS["IGS97",DYNAMIC[FRAMEEPOCH[1997]],DATUM["IGS97",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",9001]]],METHOD["Time-specific Position Vector transform (geocen)",ID["EPSG",1065]],PARAMETER["X-axis translation",0,LENGTHUNIT["centimetre",0.01],ID["EPSG",8605]],PARAMETER["Y-axis translation",0,LENGTHUNIT["centimetre",0.01],ID["EPSG",8606]],PARAMETER["Z-axis translation",0,LENGTHUNIT["centimetre",0.01],ID["EPSG",8607]],PARAMETER["X-axis rotation",0,ANGLEUNIT["milliarc-second",4.84813681109536E-09],ID["EPSG",8608]],PARAMETER["Y-axis rotation",0,ANGLEUNIT["milliarc-second",4.84813681109536E-09],ID["EPSG",8609]],PARAMETER["Z-axis rotation",0,ANGLEUNIT["milliarc-second",4.84813681109536E-09],ID["EPSG",8610]],PARAMETER["Scale difference",0,SCALEUNIT["parts per billion",1E-09],ID["EPSG",8611]],PARAMETER["Transformation reference epoch",1997,TIMEUNIT["year",31556925.445],ID["EPSG",1049]],OPERATIONACCURACY[0.0],USAGE[SCOPE["Geodesy."],AREA["World."],BBOX[-90,-180,90,180]],ID["EPSG",9028],REMARK["Scale difference in ppb where 1/billion = 1E-9 or nm/m. IGS97 is by definition aligned with ITRF97."]]