EPSG:9279 — SA LLD height

VERTCRS[
    "SA LLD height",
    VDATUM["South Africa Land Levelling Datum",ID["EPSG",1262]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ITRF2005 to SA LLD height (1)",ID["EPSG",9280]],
    ID["EPSG",9279]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:9279", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 9279,
  "name": "SA LLD height",
  "kind": "vertical",
  "area": "South Africa - onshore",
  "unit": "metre",
  "bbox": [
    -34.88,
    16.45,
    -22.13,
    32.95
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (9279, 'EPSG', 9279, '+vunits=m +no_defs +type=crs', 'VERT_CS["SA LLD height",VERT_DATUM["South Africa Land Levelling Datum",2005,AUTHORITY["EPSG","1262"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9279"]]');

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

9279=VERT_CS["SA LLD height",VERT_DATUM["South Africa Land Levelling Datum",2005,AUTHORITY["EPSG","1262"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9279"]]