EPSG:5713 — CGVD28 height

VERTCRS[
    "CGVD28 height",
    VDATUM["Canadian Geodetic Vertical Datum of 1928",ID["EPSG",5114]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",5713]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5713", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5713,
  "name": "CGVD28 height",
  "kind": "vertical",
  "area": "Canada - CGVD28",
  "unit": "metre",
  "bbox": [
    41.67,
    -141.01,
    69.81,
    -52.54
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5713, 'EPSG', 5713, '+vunits=m +no_defs +type=crs', 'VERT_CS["CGVD28 height",VERT_DATUM["Canadian Geodetic Vertical Datum of 1928",2005,AUTHORITY["EPSG","5114"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5713"]]');

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

5713=VERT_CS["CGVD28 height",VERT_DATUM["Canadian Geodetic Vertical Datum of 1928",2005,AUTHORITY["EPSG","5114"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5713"]]