EPSG:3855

EGM2008 height

Attributes

Unit: metre

Geodetic CRS: EGM2008 height

Datum: EGM2008 geoid

Data source: EPSG

Information source: US National Geospatial-Intelligence Agency (NGA). "The development and evaluation of the Earth Gravitational Model 2008 (EGM2008)", Journal of Geophysical Research: Solid Earth, volume 117 Issue B4, 2012-04-19. https://doi.org/10.1029/2011JB008916

Revision date: 2025-06-28

Scope: Geodesy.

Remarks: Zero-height surface approximating mean sea level resulting from the application of the EGM2008 spherical harmonic coefficients to the WGS 84 ellipsoid. May be approximated by application of the EGM2008 geoid model grid. Replaces EGM96 height (CRS code 5773).

Area of use: World.

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

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SimpleMap

Center coordinates
0.0 0.0

Projected bounds:
-90.0 -180.0
90.0 180.0

WGS84 bounds:
-180.0 -90.0
180.0 90.0

World.
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Definition: OGC Well Known Text

VERT_CS["EGM2008 height",
    VERT_DATUM["EGM2008 geoid",2005,
        AUTHORITY["EPSG","1027"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","3855"]]

Definition: OGC Well Known Text 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]]

Definition: ESRI Well Known Text

VERTCS["EGM2008_height",
    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/v0.7/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,AUTHORITY["EPSG","1027"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],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,AUTHORITY["EPSG","1027"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","3855"]]');