Geodetic CRS: NAD83(CSRS)v6
Datum: North American Datum of 1983 (CSRS) version 6
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: Canadian Geodetic Survey, Natural Resources Canada.
Revision date: 2024-03-16
Scope: Change of coordinate epoch in 3-dimensions (φλh).
Remarks: File initially published as cvg60.cvb, later renamed to NAD83v60VG.gvb with no change of content. Not recommended for height transformation north of 60°N due to due to inaccuracies in the vertical component of the velocity model. Replaced by v7 model.
Method: Point motion by grid (NTv2_Vel)
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
POINTMOTIONOPERATION["Canada velocity grid v6", VERSION["NRC-Can cvg6.0"], SOURCECRS[ GEOGCRS["NAD83(CSRS)v6", DATUM["North American Datum of 1983 (CSRS) version 6", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ANCHOREPOCH[2010]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,3], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], AXIS["ellipsoidal height (h)",up, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",8251]]], METHOD["Point motion by grid (NTv2_Vel)", ID["EPSG",1070]], PARAMETERFILE["Point motion velocity grid file","NAD83v6VG.gvb"], OPERATIONACCURACY[0.01], USAGE[ SCOPE["Change of coordinate epoch in 3-dimensions (φλh)."], AREA["Canada - onshore south of 60°N - Alberta, British Columbia (BC), Manitoba, New Brunswick (NB), Newfoundland and Labrador, Nova Scotia (NS), Ontario, Prince Edward Island (PEI), Quebec and Saskatchewan."], BBOX[41.67,-139.04,60.01,-52.54]], USAGE[ SCOPE["Change of coordinate epoch in 2-dimensions (φλ horizontal only)."], AREA["Canada - onshore north of 60°N - Newfoundland and Labrador; Northwest Territories (NWT); Nunavut; Quebec; Yukon."], BBOX[59.99,-141.01,83.17,-60.72]], ID["EPSG",8676], REMARK["File initially published as cvg60.cvb, later renamed to NAD83v60VG.gvb with no change of content. Not recommended for height transformation north of 60°N due to due to inaccuracies in the vertical component of the velocity model. Replaced by v7 model."]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "PointMotionOperation", "name": "Canada velocity grid v6", "source_crs": { "type": "GeographicCRS", "name": "NAD83(CSRS)v6", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum of 1983 (CSRS) version 6", "anchor_epoch": 2010, "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" }, { "name": "Ellipsoidal height", "abbreviation": "h", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 8251 } }, "method": { "name": "Point motion by grid (NTv2_Vel)", "id": { "authority": "EPSG", "code": 1070 } }, "parameters": [ { "name": "Point motion velocity grid file", "value": "NAD83v6VG.gvb", "id": { "authority": "EPSG", "code": 1050 } } ], "accuracy": "0.01", "usages": [ { "scope": "Change of coordinate epoch in 3-dimensions (φλh).", "area": "Canada - onshore south of 60°N - Alberta, British Columbia (BC), Manitoba, New Brunswick (NB), Newfoundland and Labrador, Nova Scotia (NS), Ontario, Prince Edward Island (PEI), Quebec and Saskatchewan.", "bbox": { "south_latitude": 41.67, "west_longitude": -139.04, "north_latitude": 60.01, "east_longitude": -52.54 } }, { "scope": "Change of coordinate epoch in 2-dimensions (φλ horizontal only).", "area": "Canada - onshore north of 60°N - Newfoundland and Labrador; Northwest Territories (NWT); Nunavut; Quebec; Yukon.", "bbox": { "south_latitude": 59.99, "west_longitude": -141.01, "north_latitude": 83.17, "east_longitude": -60.72 } } ], "id": { "authority": "EPSG", "code": 8676 }, "remarks": "File initially published as cvg60.cvb, later renamed to NAD83v60VG.gvb with no change of content. Not recommended for height transformation north of 60°N due to due to inaccuracies in the vertical component of the velocity model. Replaced by v7 model." }