EPSG:5600 — NGPF height

VERTCRS[
    "NGPF height",
    VDATUM["Nivellement General de Polynesie Francaise",ID["EPSG",5195]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",5600]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5600", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5600,
  "name": "NGPF height",
  "kind": "vertical",
  "area": "French Polynesia - Society Islands - main islands",
  "unit": "metre",
  "bbox": [
    -17.93,
    -152.39,
    -16.17,
    -149.09
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5600, 'EPSG', 5600, '+vunits=m +no_defs +type=crs', 'VERT_CS["NGPF height",VERT_DATUM["Nivellement General de Polynesie Francaise",2005,AUTHORITY["EPSG","5195"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5600"]]');

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

5600=VERT_CS["NGPF height",VERT_DATUM["Nivellement General de Polynesie Francaise",2005,AUTHORITY["EPSG","5195"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5600"]]