EPSG:5721 — NGF-IGN78 height

VERTCRS[
    "NGF-IGN78 height",
    VDATUM["Nivellement General de la France - IGN78",ID["EPSG",5120]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ETRS89-FRA [RGF93 v2] to NGF-IGN78 height (2)",ID["EPSG",8372]],
    ID["EPSG",5721]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5721", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5721,
  "name": "NGF-IGN78 height",
  "kind": "vertical",
  "area": "France - Corsica onshore",
  "unit": "metre",
  "bbox": [
    41.31,
    8.5,
    43.07,
    9.63
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5721, 'EPSG', 5721, '+vunits=m +no_defs +type=crs', 'VERT_CS["NGF-IGN78 height",VERT_DATUM["Nivellement General de la France - IGN78",2005,AUTHORITY["EPSG","5120"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5721"]]');

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

5721=VERT_CS["NGF-IGN78 height",VERT_DATUM["Nivellement General de la France - IGN78",2005,AUTHORITY["EPSG","5120"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5721"]]