EPSG
NASA http://cddis.gsfc.nasa.gov/926/egm96/egm96.html
2015-11-25
Geodesy.
Replaces EGM84 geoid (datum code 5203). Replaced by EGM2008 geoid (datum code 1027).
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "EGM96 geoid", "scope": "Geodesy.", "area": "World.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 5171 } }