metre
EPSG
US National Geospatial-Intelligence Agency (NGA); https://earth-info.nga.mil/GandG/update/index.php
2019-07-17
Geodesy.
Zero-height surface resulting from the application of the EGM84 geoid model to the WGS 84 ellipsoid. Replaced by EGM96 height (CRS code 5773).
Definition: OGC Well Known Text 2 (2019)
VERTCRS["EGM84 height", VDATUM["EGM84 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",5798]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "EGM84 height", "datum": { "type": "VerticalReferenceFrame", "name": "EGM84 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": 5798 } }
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 ( 5798, 'EPSG', 5798, '+vunits=m +no_defs +type=crs', 'VERT_CS["EGM84 height",VERT_DATUM["EGM84 geoid",2005,AUTHORITY["EPSG","5203"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5798"]]');