EPSG:9323

NZVD2016 height to Taranaki 1970 height (2)

Attributes

Geodetic CRS: NZVD2016 height

Datum: New Zealand Vertical Datum 2016

Data source: EPSG

Information source: Land Information New Zealand (LINZ) standard S25009 and LINZ web site http://www.linz.govt.nz/

Revision date: 2020-03-14

Scope: Change of height to a different vertical reference surface.

Remarks: Derived at 125 control points. Mean offset 0.286m, standard deviation 0.026m, maximum difference from mean 0.07m. Supersedes NZVD2016 height to Taranaki 1970 height (1) (code 7871) after change of grid file format.

Method: Vertical Offset by Grid Interpolation (gtx)

Area of use: New Zealand - North Island - Taranaki vertical CRS area.

Description: (0,)

MapTiler banner

Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["NZVD2016 height to Taranaki 1970 height (2)",
    VERSION["LINZ-NZ TARA gtx"],
    SOURCECRS[
        VERTCRS["NZVD2016 height",
            VDATUM["New Zealand Vertical Datum 2016"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7839]]],
    TARGETCRS[
        VERTCRS["Taranaki 1970 height",
            VDATUM["Taranaki 1970"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",5769]]],
    METHOD["Vertical Offset by Grid Interpolation (gtx)",
        ID["EPSG",1084]],
    PARAMETERFILE["Vertical offset file","taraht1970-nzvd2016.gtx"],
    INTERPOLATIONCRS[
        GEOGCRS["NZGD2000",
            DATUM["New Zealand Geodetic Datum 2000",
                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[0.02],
    USAGE[
        SCOPE["Change of height to a different vertical reference surface."],
        AREA["New Zealand - North Island - Taranaki vertical CRS area."],
        BBOX[-39.92,173.68,-38.41,174.95]],
    ID["EPSG",9323],
    REMARK["Derived at 125 control points. Mean offset 0.286m, standard deviation 0.026m, maximum difference from mean 0.07m. Supersedes NZVD2016 height to Taranaki 1970 height (1) (code 7871) after change of grid file format."]]

Definition: PROJ.4

+proj=vgridshift +grids=nz_linz_taraht1970-nzvd2016.tif +multiplier=1

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:9323","+proj=vgridshift +grids=nz_linz_taraht1970-nzvd2016.tif +multiplier=1");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "NZVD2016 height to Taranaki 1970 height (2)",
    "source_crs": {
        "type": "VerticalCRS",
        "name": "NZVD2016 height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "New Zealand Vertical Datum 2016"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7839
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "Taranaki 1970 height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Taranaki 1970"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 5769
        }
    },
    "interpolation_crs": {
        "type": "GeographicCRS",
        "name": "NZGD2000",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "New Zealand Geodetic Datum 2000",
            "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": 4167
        }
    },
    "method": {
        "name": "Vertical Offset by Grid Interpolation (gtx)",
        "id": {
            "authority": "EPSG",
            "code": 1084
        }
    },
    "parameters": [
        {
            "name": "Vertical offset file",
            "value": "taraht1970-nzvd2016.gtx",
            "id": {
                "authority": "EPSG",
                "code": 8732
            }
        }
    ],
    "accuracy": "0.02",
    "scope": "Change of height to a different vertical reference surface.",
    "area": "New Zealand - North Island - Taranaki vertical CRS area.",
    "bbox": {
        "south_latitude": -39.92,
        "west_longitude": 173.68,
        "north_latitude": -38.41,
        "east_longitude": 174.95
    },
    "id": {
        "authority": "EPSG",
        "code": 9323
    },
    "remarks": "Derived at 125 control points. Mean offset 0.286m, standard deviation 0.026m, maximum difference from mean 0.07m. Supersedes NZVD2016 height to Taranaki 1970 height (1) (code 7871) after change of grid file format."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=vgridshift"
	"grids=nz_linz_taraht1970-nzvd2016.tif"
	"multiplier=1"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=vgridshift +grids=nz_linz_taraht1970-nzvd2016.tif +multiplier=1">
	<Layer srs="+proj=vgridshift +grids=nz_linz_taraht1970-nzvd2016.tif +multiplier=1">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9323, 'EPSG', 9323, '+proj=vgridshift +grids=nz_linz_taraht1970-nzvd2016.tif +multiplier=1', 'None');