EPSG:8676

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 (NEU domain) (NTv2_Vel)",
        ID["EPSG",1141]],
    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 NAD83v6VG.gvb with no change of content. Not recommended for height transformation north of 60°N due to inaccuracies in the vertical component of the model. Replaced by Canada velocity grid v7. Although the interpolation CRS is given as NAD83(CSRS)v6 (also known as NAD83(CSRS) 2010), any version of NAD83(CSRS) may be used for grid interpolation without significant error."]]

{
    "$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 (NEU domain) (NTv2_Vel)",
        "id": {
            "authority": "EPSG",
            "code": 1141
        }
    },
    "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 NAD83v6VG.gvb with no change of content. Not recommended for height transformation north of 60°N due to inaccuracies in the vertical component of the model. Replaced by Canada velocity grid v7. Although the interpolation CRS is given as NAD83(CSRS)v6 (also known as NAD83(CSRS) 2010), any version of NAD83(CSRS) may be used for grid interpolation without significant error."
}

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8676, 'EPSG', 8676, 'None', 'None');