EPSG:10612

NAD83(CSRS)v7 to CGVD28(HTv2.0) height (1)

Attributes

Geodetic CRS: NAD83(CSRS)v7

Datum: North American Datum of 1983 (CSRS) version 7

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: Geodetic Survey Division, Natural Resources Canada.

Revision date: 2024-10-09

Scope: Derivation of approximate gravity-related heights from GNSS observations.

Remarks: Hybrid geoid model, valid at epoch 2010.0. Grid derived at epoch 1997.0 through NAD83(CSRS)v3 (CRS code 8235) and then modified to include correction for propagation of height between 1997.0 and 2010.0 derived from the Canada velocity grid v7.0.

Method: Geographic3D to GravityRelatedHeight (NRCan byn)

Area of use: Canada - onshore and offshore between 41°N and 84°N and west of 48°W - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon.

Description: (0,)

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SimpleMap
Canada - onshore and offshore between 41°N and 84°N and west of 48°W - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon.

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["NAD83(CSRS)v7 to CGVD28(HTv2.0) height (1)",
    VERSION["NRC-Can CGG2000 2010"],
    SOURCECRS[
        GEOGCRS["NAD83(CSRS)v7",
            DATUM["North American Datum of 1983 (CSRS) version 7",
                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",8254]]],
    TARGETCRS[
        VERTCRS["CGVD28(HTv2.0) height",
            VDATUM["Canadian Geodetic Vertical Datum of 1928 (Height Transformation version 2.0)",
                ANCHOREPOCH[1997]],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",10588]]],
    METHOD["Geographic3D to GravityRelatedHeight (NRCan byn)",
        ID["EPSG",1060]],
    PARAMETERFILE["Geoid (height correction) model file","HT2_2010v70.byn"],
    OPERATIONACCURACY[0.03],
    USAGE[
        SCOPE["Derivation of approximate gravity-related heights from GNSS observations."],
        AREA["Canada - onshore and offshore between 41°N and 84°N and west of 48°W - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon."],
        BBOX[41,-141.01,84,-48]],
    ID["EPSG",10612],
    REMARK["Hybrid geoid model, valid at epoch 2010.0. Grid derived at epoch 1997.0 through NAD83(CSRS)v3 (CRS code 8235) and then modified to include correction for propagation of height between 1997.0 and 2010.0 derived from the Canada velocity grid v7.0."]]

Definition: PROJ.4

+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ca_nrc_HT2_2010v70.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:10612","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ca_nrc_HT2_2010v70.tif +multiplier=1 +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": "NAD83(CSRS)v7 to CGVD28(HTv2.0) height (1)",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "NAD83(CSRS)v7",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "North American Datum of 1983 (CSRS) version 7",
            "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": 8254
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "CGVD28(HTv2.0) height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Canadian Geodetic Vertical Datum of 1928 (Height Transformation version 2.0)",
            "anchor_epoch": 1997
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 10588
        }
    },
    "method": {
        "name": "Geographic3D to GravityRelatedHeight (NRCan byn)",
        "id": {
            "authority": "EPSG",
            "code": 1060
        }
    },
    "parameters": [
        {
            "name": "Geoid (height correction) model file",
            "value": "HT2_2010v70.byn",
            "id": {
                "authority": "EPSG",
                "code": 8666
            }
        }
    ],
    "accuracy": "0.03",
    "scope": "Derivation of approximate gravity-related heights from GNSS observations.",
    "area": "Canada - onshore and offshore between 41°N and 84°N and west of 48°W - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon.",
    "bbox": {
        "south_latitude": 41,
        "west_longitude": -141.01,
        "north_latitude": 84,
        "east_longitude": -48
    },
    "id": {
        "authority": "EPSG",
        "code": 10612
    },
    "remarks": "Hybrid geoid model, valid at epoch 2010.0. Grid derived at epoch 1997.0 through NAD83(CSRS)v3 (CRS code 8235) and then modified to include correction for propagation of height between 1997.0 and 2010.0 derived from the Canada velocity grid v7.0."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=pipeline"
	"step"
	"proj=axisswap"
	"order=2,1"
	"step"
	"proj=unitconvert"
	"xy_in=deg"
	"xy_out=rad"
	"step"
	"inv"
	"proj=vgridshift"
	"grids=ca_nrc_HT2_2010v70.tif"
	"multiplier=1"
	"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 +inv +proj=vgridshift +grids=ca_nrc_HT2_2010v70.tif +multiplier=1 +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 +inv +proj=vgridshift +grids=ca_nrc_HT2_2010v70.tif +multiplier=1 +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 ( 10612, 'EPSG', 10612, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ca_nrc_HT2_2010v70.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');