Cais das Velas depth to ZH Portugal depth (1)

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: Offshore of S. Jorge island the Zero Hidrografico (CD Portugal) surface is defined to be 1.0m below the Cais das Velas vertical reference surface.

Method: Vertical Offset

Area of use: Portugal - central Azores - Sao Jorge island - nearshore.

Description: (0,)

Covered area powered by MapTiler

Portugal - central Azores - Sao Jorge island - nearshore.

Definition: OGC Well Known Text 2 (2019)

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COORDINATEOPERATION["Cais das Velas depth to ZH Portugal depth (1)",
    VERSION["IH-Por S Jorge"],
    SOURCECRS[
        VERTCRS["Cais das Velas depth",
            VDATUM["Cais das Velas"],
            CS[vertical,1],
                AXIS["depth (D)",down,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",10375]]],
    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",-1,
        LENGTHUNIT["metre",1],
        ID["EPSG",8603]],
    OPERATIONACCURACY[0.0],
    USAGE[
        SCOPE["Change of depth to a different vertical reference surface."],
        AREA["Portugal - central Azores - Sao Jorge island - nearshore."],
        BBOX[38.48,-28.39,38.81,-27.68]],
    ID["EPSG",10387],
    REMARK["Offshore of S. Jorge island the Zero Hidrografico (CD Portugal) surface is defined to be 1.0m below the Cais das Velas vertical reference surface."]]

Definition: PROJ.4

+proj=geogoffset +dh=-1

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:10387","+proj=geogoffset +dh=-1");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "Cais das Velas depth to ZH Portugal depth (1)",
    "source_crs": {
        "type": "VerticalCRS",
        "name": "Cais das Velas depth",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Cais das Velas"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Depth",
                    "abbreviation": "D",
                    "direction": "down",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 10375
        }
    },
    "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": -1,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8603
            }
        }
    ],
    "accuracy": "0.0",
    "scope": "Change of depth to a different vertical reference surface.",
    "area": "Portugal - central Azores - Sao Jorge island - nearshore.",
    "bbox": {
        "south_latitude": 38.48,
        "west_longitude": -28.39,
        "north_latitude": 38.81,
        "east_longitude": -27.68
    },
    "id": {
        "authority": "EPSG",
        "code": 10387
    },
    "remarks": "Offshore of S. Jorge island the Zero Hidrografico (CD Portugal) surface is defined to be 1.0m below the Cais das Velas vertical reference surface."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=geogoffset"
	"dh=-1"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=geogoffset +dh=-1">
	<Layer srs="+proj=geogoffset +dh=-1">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10387, 'EPSG', 10387, '+proj=geogoffset +dh=-1', 'None');

EPSG:10387