EPSG:7981

Kuwait PWD height to KOC WD height (1)

Attributes

Geodetic CRS: Kuwait PWD height

Datum: Kuwait PWD

Data source: EPSG

Information source: KOC

Revision date: 2017-10-16

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

Remarks: The KOC WD vertical reference surface is 4.25m above the Kuwait PWD surface.

Method: Vertical Offset

Area of use: Kuwait - onshore.

Description: (0,)

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SimpleMap
Kuwait - onshore.

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["Kuwait PWD height to KOC WD height (1)",
    VERSION["KOC-Kwt"],
    SOURCECRS[
        VERTCRS["Kuwait PWD height",
            VDATUM["Kuwait PWD"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",5788]]],
    TARGETCRS[
        VERTCRS["KOC WD height",
            VDATUM["KOC Well Datum"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7979]]],
    METHOD["Vertical Offset",
        ID["EPSG",9616]],
    PARAMETER["Vertical Offset",-4.25,
        LENGTHUNIT["metre",1],
        ID["EPSG",8603]],
    OPERATIONACCURACY[0.1],
    USAGE[
        SCOPE["Change of height to a different vertical reference surface."],
        AREA["Kuwait - onshore."],
        BBOX[28.53,46.54,30.09,48.48]],
    ID["EPSG",7981],
    REMARK["The KOC WD vertical reference surface is 4.25m above the Kuwait PWD surface."]]

Definition: PROJ.4

+proj=geogoffset +dh=-4.25

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:7981","+proj=geogoffset +dh=-4.25");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "Kuwait PWD height to KOC WD height (1)",
    "source_crs": {
        "type": "VerticalCRS",
        "name": "Kuwait PWD height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Kuwait PWD"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 5788
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "KOC WD height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "KOC Well Datum"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7979
        }
    },
    "method": {
        "name": "Vertical Offset",
        "id": {
            "authority": "EPSG",
            "code": 9616
        }
    },
    "parameters": [
        {
            "name": "Vertical Offset",
            "value": -4.25,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8603
            }
        }
    ],
    "accuracy": "0.1",
    "scope": "Change of height to a different vertical reference surface.",
    "area": "Kuwait - onshore.",
    "bbox": {
        "south_latitude": 28.53,
        "west_longitude": 46.54,
        "north_latitude": 30.09,
        "east_longitude": 48.48
    },
    "id": {
        "authority": "EPSG",
        "code": 7981
    },
    "remarks": "The KOC WD vertical reference surface is 4.25m above the Kuwait PWD surface."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=geogoffset"
	"dh=-4.25"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=geogoffset +dh=-4.25">
	<Layer srs="+proj=geogoffset +dh=-4.25">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 7981, 'EPSG', 7981, '+proj=geogoffset +dh=-4.25', 'None');