EPSG:9923

GNTRANS height

Attributes

Unit: metre

Geodetic CRS: GNTRANS height

Datum: GNTRANS

Data source: EPSG

Information source: Deutsche Bahn AG via Geo++, www.geopp.de

Revision date: 2021-12-30

Scope: Engineering survey and topographic mapping for railway applications.

Remarks: Introduced in 2003. Replaces DB Netz use of DHHN12, SNN76, DHHN85 and DHHN92 as variously adopted by German states but which DB Netz used with smoothing across boundary discontinuity. Replaced by GNTRANS2016 height (CRS code 9927).

Area of use: Germany - onshore - states of Baden-Wurtemberg, Bayern, Berlin, Brandenburg, Bremen, Hamburg, Hessen, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Saarland, Sachsen, Sachsen-Anhalt, Schleswig-Holstein, Thuringen.

Coordinate system: Vertical CS. Axis: height (H). Orientation: up. UoM: m.

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Definition: OGC Well Known Text

VERT_CS["GNTRANS height",
    VERT_DATUM["GNTRANS",2005,
        AUTHORITY["EPSG","1316"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","9923"]]

Definition: OGC Well Known Text 2 (2019)

VERTCRS["GNTRANS height",
    VDATUM["GNTRANS"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey and topographic mapping for railway applications."],
        AREA["Germany - onshore - states of Baden-Wurtemberg, Bayern, Berlin, Brandenburg, Bremen, Hamburg, Hessen, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Saarland, Sachsen, Sachsen-Anhalt, Schleswig-Holstein, Thuringen."],
        BBOX[47.27,5.86,55.09,15.04]],
    ID["EPSG",9923]]

Definition: ESRI Well Known Text

VERTCS["GNTRANS_height",
    VDATUM["GNTRANS"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+vunits=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:9923","+vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "GNTRANS height",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "GNTRANS"
    },
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
            {
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey and topographic mapping for railway applications.",
    "area": "Germany - onshore - states of Baden-Wurtemberg, Bayern, Berlin, Brandenburg, Bremen, Hamburg, Hessen, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Saarland, Sachsen, Sachsen-Anhalt, Schleswig-Holstein, Thuringen.",
    "bbox": {
        "south_latitude": 47.27,
        "west_longitude": 5.86,
        "north_latitude": 55.09,
        "east_longitude": 15.04
    },
    "id": {
        "authority": "EPSG",
        "code": 9923
    }
}

Definition: GeoServer

9923=VERT_CS["GNTRANS height",VERT_DATUM["GNTRANS",2005,AUTHORITY["EPSG","1316"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9923"]]

Definition: MapServer - MAPfile

PROJECTION
	"vunits=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+vunits=m +no_defs +type=crs">
	<Layer srs="+vunits=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9923, 'EPSG', 9923, '+vunits=m +no_defs +type=crs', 'VERT_CS["GNTRANS height",VERT_DATUM["GNTRANS",2005,AUTHORITY["EPSG","1316"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9923"]]');