Cascais depth to ZH Portugal depth (2)

Attributes

Data source: EPSG

Information source: Instituto Hidrográfico, https://www.hidrografico.pt/

Revision date: 2023-08-07

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

Remarks: The Zero Hidrografico surface is defined to be 2.08 metres below the Cascais vertical reference surface in the Tagus estuary off Lisbon and 2.0m below the Cascais vertical reference surface offshore mainland Portugal (see CT 10380).

Method: Vertical Offset

Area of use: Portugal - mainland - nearshore - Tagus estuary.

Description: (0,)

Covered area powered by MapTiler

Portugal - mainland - nearshore - Tagus estuary.

Definition: OGC Well Known Text 2 (2019)

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COORDINATEOPERATION["Cascais depth to ZH Portugal depth (2)",
    VERSION["IH-Por Tagus"],
    SOURCECRS[
        VERTCRS["Cascais depth",
            VDATUM["Cascais"],
            CS[vertical,1],
                AXIS["depth (D)",down,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",10364]]],
    TARGETCRS[
        VERTCRS["ZH Portugal depth",
            VDATUM["Chart Datum Portugal "],
            CS[vertical,1],
                AXIS["depth (D)",down,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",10349]]],
    METHOD["Vertical Offset",
        ID["EPSG",9616]],
    PARAMETER["Vertical Offset",-2.08,
        LENGTHUNIT["metre",1],
        ID["EPSG",8603]],
    OPERATIONACCURACY[0.0],
    USAGE[
        SCOPE["Change of depth to a different vertical reference surface."],
        AREA["Portugal - mainland - nearshore - Tagus estuary."],
        BBOX[38.58,-9.46,38.96,-8.92]],
    ID["EPSG",10381],
    REMARK["The Zero Hidrografico surface is defined to be 2.08 metres below the Cascais vertical reference surface in the Tagus estuary off Lisbon and 2.0m below the Cascais vertical reference surface offshore mainland Portugal (see CT 10380). "]]

Definition: PROJ.4

+proj=geogoffset +dh=-2.08

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:10381","+proj=geogoffset +dh=-2.08");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "Cascais depth to ZH Portugal depth (2)",
    "source_crs": {
        "type": "VerticalCRS",
        "name": "Cascais depth",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Cascais"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Depth",
                    "abbreviation": "D",
                    "direction": "down",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 10364
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "ZH Portugal depth",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Chart Datum Portugal "
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Depth",
                    "abbreviation": "D",
                    "direction": "down",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 10349
        }
    },
    "method": {
        "name": "Vertical Offset",
        "id": {
            "authority": "EPSG",
            "code": 9616
        }
    },
    "parameters": [
        {
            "name": "Vertical Offset",
            "value": -2.08,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8603
            }
        }
    ],
    "accuracy": "0.0",
    "scope": "Change of depth to a different vertical reference surface.",
    "area": "Portugal - mainland - nearshore - Tagus estuary.",
    "bbox": {
        "south_latitude": 38.58,
        "west_longitude": -9.46,
        "north_latitude": 38.96,
        "east_longitude": -8.92
    },
    "id": {
        "authority": "EPSG",
        "code": 10381
    },
    "remarks": "The Zero Hidrografico surface is defined to be 2.08 metres below the Cascais vertical reference surface in the Tagus estuary off Lisbon and 2.0m below the Cascais vertical reference surface offshore mainland Portugal (see CT 10380). "
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=geogoffset"
	"dh=-2.08"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=geogoffset +dh=-2.08">
	<Layer srs="+proj=geogoffset +dh=-2.08">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10381, 'EPSG', 10381, '+proj=geogoffset +dh=-2.08', 'None');

EPSG:10381