EPSG:9305

COORDINATEOPERATION["SRGI2013 to INAGeoid2020 v1 height (1)",
    VERSION["BIG-Idn INAGeoid20 v1"],
    SOURCECRS[
        GEOGCRS["SRGI2013",
            DYNAMIC[
                FRAMEEPOCH[2012]],
            DATUM["Sistem Referensi Geospasial Indonesia 2013",
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    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",9469]]],
    TARGETCRS[
        VERTCRS["INAGeoid2020 v1 height",
            VDATUM["Indonesian Geoid 2020 version 1"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",9471]]],
    METHOD["Geographic3D to GravityRelatedHeight (gtx)",
        ID["EPSG",9665]],
    PARAMETERFILE["Geoid (height correction) model file","INAGEOID2020v1.gtx"],
    OPERATIONACCURACY[0.0],
    USAGE[
        SCOPE["Derivation of gravity-related heights from GNSS observations."],
        AREA["Indonesia - onshore and offshore."],
        BBOX[-13.95,92.01,7.79,141.46]],
    ID["EPSG",9305],
    REMARK["Defines INAGeoid2020 v1 reference surface and as such is considered to be errorless. Internal accuracy is between 0.05 and 0.24m on the large islands of Indonesia. Replaced by INAGeoid2020 v2 (CT code 20043). Before 2022, v1 file name was INAGEOID20.gtx."]]

proj4.defs("EPSG:9305","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=INAGEOID2020v1.gtx +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": "SRGI2013 to INAGeoid2020 v1 height (1)",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "SRGI2013",
        "datum": {
            "type": "DynamicGeodeticReferenceFrame",
            "name": "Sistem Referensi Geospasial Indonesia 2013",
            "frame_reference_epoch": 2012,
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            }
        },
        "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": 9469
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "INAGeoid2020 v1 height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Indonesian Geoid 2020 version 1"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 9471
        }
    },
    "method": {
        "name": "Geographic3D to GravityRelatedHeight (gtx)",
        "id": {
            "authority": "EPSG",
            "code": 9665
        }
    },
    "parameters": [
        {
            "name": "Geoid (height correction) model file",
            "value": "INAGEOID2020v1.gtx",
            "id": {
                "authority": "EPSG",
                "code": 8666
            }
        }
    ],
    "accuracy": "0.0",
    "scope": "Derivation of gravity-related heights from GNSS observations.",
    "area": "Indonesia - onshore and offshore.",
    "bbox": {
        "south_latitude": -13.95,
        "west_longitude": 92.01,
        "north_latitude": 7.79,
        "east_longitude": 141.46
    },
    "id": {
        "authority": "EPSG",
        "code": 9305
    },
    "remarks": "Defines INAGeoid2020 v1 reference surface and as such is considered to be errorless. Internal accuracy is between 0.05 and 0.24m on the large islands of Indonesia. Replaced by INAGeoid2020 v2 (CT code 20043). Before 2022, v1 file name was INAGEOID20.gtx."
}

<?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=INAGEOID2020v1.gtx +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=INAGEOID2020v1.gtx +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 ( 9305, 'EPSG', 9305, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=INAGEOID2020v1.gtx +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');