EPSG:9523

COMPD_CS["NAD83(2011) + VIVD09 height",
    GEOGCS["NAD83(2011)",
        DATUM["NAD83_National_Spatial_Reference_System_2011",
            SPHEROID["GRS 1980",6378137,298.257222101,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","1116"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","6318"]],
    VERT_CS["VIVD09 height",
        VERT_DATUM["Virgin Islands Vertical Datum of 2009",2005,
            AUTHORITY["EPSG","1124"]],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","6642"]],
    AUTHORITY["EPSG","9523"]]

COMPOUNDCRS["NAD83(2011) + VIVD09 height",
    GEOGCRS["NAD83(2011)",
        DATUM["NAD83 (National Spatial Reference System 2011)",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        CS[ellipsoidal,2],
            AXIS["geodetic latitude (Lat)",north,
                ORDER[1],
                ANGLEUNIT["degree",0.0174532925199433]],
            AXIS["geodetic longitude (Lon)",east,
                ORDER[2],
                ANGLEUNIT["degree",0.0174532925199433]]],
    VERTCRS["VIVD09 height",
        VDATUM["Virgin Islands Vertical Datum of 2009"],
        CS[vertical,1],
            AXIS["gravity-related height (H)",up,
                LENGTHUNIT["metre",1]]],
    USAGE[
        SCOPE["Spatial referencing."],
        AREA["US Virgin Islands - onshore - St Croix, St John, and St Thomas."],
        BBOX[17.62,-65.09,18.44,-64.51]],
    ID["EPSG",9523]]

GEOGCS["GCS_NAD_1983_2011",
    DATUM["D_NAD_1983_2011",
        SPHEROID["GRS_1980",6378137.0,298.257222101]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]],
VERTCS["VIVD09_height",
    VDATUM["Virgin_Islands_Vertical_Datum_of_2009"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["Meter",1.0]]

proj4.defs("EPSG:9523","+proj=longlat +ellps=GRS80 +vunits=m +no_defs +type=crs");

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "CompoundCRS",
    "name": "NAD83(2011) + VIVD09 height",
    "components": [
        {
            "type": "GeographicCRS",
            "name": "NAD83(2011)",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "NAD83 (National Spatial Reference System 2011)",
                "ellipsoid": {
                    "name": "GRS 1980",
                    "semi_major_axis": 6378137,
                    "inverse_flattening": 298.257222101
                }
            },
            "coordinate_system": {
                "subtype": "ellipsoidal",
                "axis": [
                    {
                        "name": "Geodetic latitude",
                        "abbreviation": "Lat",
                        "direction": "north",
                        "unit": "degree"
                    },
                    {
                        "name": "Geodetic longitude",
                        "abbreviation": "Lon",
                        "direction": "east",
                        "unit": "degree"
                    }
                ]
            }
        },
        {
            "type": "VerticalCRS",
            "name": "VIVD09 height",
            "datum": {
                "type": "VerticalReferenceFrame",
                "name": "Virgin Islands Vertical Datum of 2009"
            },
            "coordinate_system": {
                "subtype": "vertical",
                "axis": [
                    {
                        "name": "Gravity-related height",
                        "abbreviation": "H",
                        "direction": "up",
                        "unit": "metre"
                    }
                ]
            }
        }
    ],
    "scope": "Spatial referencing.",
    "area": "US Virgin Islands - onshore - St Croix, St John, and St Thomas.",
    "bbox": {
        "south_latitude": 17.62,
        "west_longitude": -65.09,
        "north_latitude": 18.44,
        "east_longitude": -64.51
    },
    "id": {
        "authority": "EPSG",
        "code": 9523
    }
}

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=GRS80 +vunits=m +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=GRS80 +vunits=m +no_defs +type=crs">
	</Layer>
</Map>

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9523, 'EPSG', 9523, '+proj=longlat +ellps=GRS80 +vunits=m +no_defs +type=crs', 'COMPD_CS["NAD83(2011) + VIVD09 height",GEOGCS["NAD83(2011)",DATUM["NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1116"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6318"]],VERT_CS["VIVD09 height",VERT_DATUM["Virgin Islands Vertical Datum of 2009",2005,AUTHORITY["EPSG","1124"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6642"]],AUTHORITY["EPSG","9523"]]');