EPSG:10666

COORDINATEOPERATION["ETRF2000 to EOMA 1980 height (2)",
    VERSION["BME-Hun geoid14"],
    SOURCECRS[
        GEOGCRS["ETRF2000",
            DATUM["European Terrestrial Reference Frame 2000",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,3],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["ellipsoidal height (h)",up,
                    ORDER[3],
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7931]]],
    TARGETCRS[
        VERTCRS["EOMA 1980 height",
            VDATUM["Baltic 1980"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",5787]]],
    METHOD["Geographic3D to GravityRelatedHeight (gtg)",
        ID["EPSG",1123]],
    PARAMETERFILE["Geoid (height correction) model file","hu_bme_geoid2014.tif"],
    OPERATIONACCURACY[0.06],
    USAGE[
        SCOPE["Derivation of gravity-related heights from GNSS observations."],
        AREA["Hungary."],
        BBOX[45.74,16.11,48.58,22.9]],
    ID["EPSG",10666],
    REMARK["Emulation to better than 7mm of the official SGO EHT model (CT code 10661). The geoid height values were obtained from the online EHT service. For reversible alternative to this transformation see ETRF2000 to ETRF2000 + EOMA 1980 height (2) (code 10667)."]]

proj4.defs("EPSG:10666","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=hu_bme_geoid2014.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "ETRF2000 to EOMA 1980 height (2)",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "ETRF2000",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "European Terrestrial Reference Frame 2000",
            "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"
                },
                {
                    "name": "Ellipsoidal height",
                    "abbreviation": "h",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7931
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "EOMA 1980 height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Baltic 1980"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 5787
        }
    },
    "method": {
        "name": "Geographic3D to GravityRelatedHeight (gtg)",
        "id": {
            "authority": "EPSG",
            "code": 1123
        }
    },
    "parameters": [
        {
            "name": "Geoid (height correction) model file",
            "value": "hu_bme_geoid2014.tif",
            "id": {
                "authority": "EPSG",
                "code": 8666
            }
        }
    ],
    "accuracy": "0.06",
    "scope": "Derivation of gravity-related heights from GNSS observations.",
    "area": "Hungary.",
    "bbox": {
        "south_latitude": 45.74,
        "west_longitude": 16.11,
        "north_latitude": 48.58,
        "east_longitude": 22.9
    },
    "id": {
        "authority": "EPSG",
        "code": 10666
    },
    "remarks": "Emulation to better than 7mm of the official SGO EHT model (CT code 10661). The geoid height values were obtained from the online EHT service. For reversible alternative to this transformation see ETRF2000 to ETRF2000 + EOMA 1980 height (2) (code 10667)."
}

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=hu_bme_geoid2014.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	<Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=hu_bme_geoid2014.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	</Layer>
</Map>

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10666, 'EPSG', 10666, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=hu_bme_geoid2014.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');