EPSG:5742 — Lerwick height

VERTCRS[
    "Lerwick height",
    VDATUM["Lerwick",ID["EPSG",5140]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ETRS89-GBR [OSNet v2009] to Lerwick height (2)",ID["EPSG",7714]],
    GEOIDMODEL["ETRS89 to Lerwick height (1)",ID["EPSG",10027]],
    ID["EPSG",5742]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5742", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5742,
  "name": "Lerwick height",
  "kind": "vertical",
  "area": "UK - Shetland Islands onshore",
  "unit": "metre",
  "bbox": [
    59.83,
    -1.78,
    60.87,
    -0.67
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5742, 'EPSG', 5742, '+vunits=m +no_defs +type=crs', 'VERT_CS["Lerwick height",VERT_DATUM["Lerwick",2005,AUTHORITY["EPSG","5140"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5742"]]');

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

5742=VERT_CS["Lerwick height",VERT_DATUM["Lerwick",2005,AUTHORITY["EPSG","5140"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5742"]]