EPSG:3855

EGM2008 height

Attributes

Unit: metre

Geodetic CRS: EGM2008 height

Datum: EGM2008 geoid

Data source: EPSG

Information source: http://earth-info.nga.mil/GandG/wgs84/gravitymod/egm2008/egm08_wgs84.html

Revision date: 2019-07-17

Scope: Geodesy.

Remarks: Zero-height surface resulting from the application of the EGM2008 geoid model to the WGS 84 ellipsoid. Replaces EGM96 height (CRS code 5773).

Area of use: World.

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

Center coordinates
0.0 0.0

Projected bounds:
-85.0 -179.9
85.0 179.9

WGS84 bounds:
-180.0 -90.0
180.0 90.0

World.
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Definition: Well Known Text (WKT)

VERT_CS["EGM2008 height",
    VERT_DATUM["EGM2008 geoid",2005],
    UNIT["metre",1],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","3855"]]

Definition: ESRI WKT

VERTCS["EGM2008_Geoid",VDATUM["EGM2008_Geoid"],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:3855","+vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "EGM2008 height",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "EGM2008 geoid"
    },
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
            {
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "World.",
    "bbox": {
        "south_latitude": -90,
        "west_longitude": -180,
        "north_latitude": 90,
        "east_longitude": 180
    },
    "id": {
        "authority": "EPSG",
        "code": 3855
    }
}

Definition: GeoServer

3855=VERT_CS["EGM2008 height",VERT_DATUM["EGM2008 geoid",2005],UNIT["metre",1],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","3855"]]

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 ( 3855, 'EPSG', 3855, '+vunits=m +no_defs +type=crs', 'VERT_CS["EGM2008 height",VERT_DATUM["EGM2008 geoid",2005],UNIT["metre",1],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","3855"]]');

Definition: OGC WKT

VERT_CS["EGM2008 height",VERT_DATUM["EGM2008 geoid",2005],UNIT["metre",1],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","3855"]]

Definition: OGC WKT 2 (2019)

VERTCRS["EGM2008 height",VDATUM["EGM2008 geoid"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Geodesy."],AREA["World."],BBOX[-90,-180,90,180]],ID["EPSG",3855]]