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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: Geodetic Survey Division, Natural Resources Canada.
Revision date: 2023-07-17
Scope: Reversible geoid model transformation.
Remarks: Reversible alternative to NAD83(CSRS)v6 to CGVD2013a(2010) height (1) (code 9247).
Method: Geog3D to Geog2D+GravityRelatedHeight (NRCan byn)
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height (1)", VERSION["NRC Can CGG2013a"], SOURCECRS[ GEOGCRS["NAD83(CSRS)v6", DATUM["North American Datum of 1983 (CSRS) version 6", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], 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]]], TARGETCRS[ COMPOUNDCRS["NAD83(CSRS)v6 + CGVD2013a(2010) height", GEOGCRS["NAD83(CSRS)v6", DATUM["North American Datum of 1983 (CSRS) version 6", ELLIPSOID["GRS 1980",6378137,298.257222101, 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]]], VERTCRS["CGVD2013a(2010) height", VDATUM["Canadian Geodetic Vertical Datum of 2013 (CGG2013a) epoch 2010"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]]], ID["EPSG",9544]]], METHOD["Geog3D to Geog2D+GravityRelatedHeight (NRCan byn)", ID["EPSG",1090]], PARAMETERFILE["Geoid (height correction) model file","CGG2013an83.byn"], INTERPOLATIONCRS[ GEOGCRS["NAD83(CSRS)v6", DATUM["North American Datum of 1983 (CSRS) version 6", ELLIPSOID["GRS 1980",6378137,298.257222101, 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]]]], OPERATIONACCURACY[0.03], USAGE[ SCOPE["Reversible geoid model transformation."], AREA["Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon."], BBOX[38.21,-141.01,86.46,-40.73]], ID["EPSG",9644], REMARK["Reversible alternative to NAD83(CSRS)v6 to CGVD2013a(2010) height (1) (code 9247)."]]
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_CGG2013an83.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:9644","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ca_nrc_CGG2013an83.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)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height (1)", "source_crs": { "type": "GeographicCRS", "name": "NAD83(CSRS)v6", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum of 1983 (CSRS) version 6", "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 } }, "target_crs": { "type": "CompoundCRS", "name": "NAD83(CSRS)v6 + CGVD2013a(2010) height", "components": [ { "type": "GeographicCRS", "name": "NAD83(CSRS)v6", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum of 1983 (CSRS) version 6", "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" } ] } }, { "type": "VerticalCRS", "name": "CGVD2013a(2010) height", "datum": { "type": "VerticalReferenceFrame", "name": "Canadian Geodetic Vertical Datum of 2013 (CGG2013a) epoch 2010" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] } } ], "id": { "authority": "EPSG", "code": 9544 } }, "interpolation_crs": { "type": "GeographicCRS", "name": "NAD83(CSRS)v6", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum of 1983 (CSRS) version 6", "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" } ] }, "id": { "authority": "EPSG", "code": 8252 } }, "method": { "name": "Geog3D to Geog2D+GravityRelatedHeight (NRCan byn)", "id": { "authority": "EPSG", "code": 1090 } }, "parameters": [ { "name": "Geoid (height correction) model file", "value": "CGG2013an83.byn", "id": { "authority": "EPSG", "code": 8666 } } ], "accuracy": "0.03", "scope": "Reversible geoid model transformation.", "area": "Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon.", "bbox": { "south_latitude": 38.21, "west_longitude": -141.01, "north_latitude": 86.46, "east_longitude": -40.73 }, "id": { "authority": "EPSG", "code": 9644 }, "remarks": "Reversible alternative to NAD83(CSRS)v6 to CGVD2013a(2010) height (1) (code 9247)." }
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_CGG2013an83.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_CGG2013an83.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_CGG2013an83.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 ( 9644, 'EPSG', 9644, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ca_nrc_CGG2013an83.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');
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