BoundCRS does not recognize Usage node

[olivier80]

It is not possible to create a BoundCRS with an area of use using wkt or projjson.

For example, if I use proj_create() with following WKT :

BOUNDCRS[
    SOURCECRS[
        PROJCRS["Monte Mario / Italy zone 2",
            BASEGEOGCRS["Monte Mario",
                DATUM["Monte Mario", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4265]],
            CONVERSION["unnamed",
                METHOD["Transverse Mercator", ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",15, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]],
                PARAMETER["False easting",2520000, LENGTHUNIT["metre",1], ID["EPSG",8806]],
                PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["x",east, ORDER[1], LENGTHUNIT["metre",1]],
                AXIS["y",north, ORDER[2], LENGTHUNIT["metre",1]],
            ID["EPSG",3004]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            DATUM["World Geodetic System 1984", ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["latitude",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["longitude",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["Transformation from Monte Mario to WGS84",
        METHOD["Position Vector transformation (geog2D domain)", ID["EPSG",9606]],
        PARAMETER["X-axis translation",-50.2, ID["EPSG",8605]],
        PARAMETER["Y-axis translation",-50.4, ID["EPSG",8606]],
        PARAMETER["Z-axis translation",84.8, ID["EPSG",8607]],
        PARAMETER["X-axis rotation",-0.69, ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",-2.012, ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",0.459, ID["EPSG",8610]],
        PARAMETER["Scale difference",0.99997192, ID["EPSG",8611]]],
    USAGE[
        SCOPE["unknown"],
        AREA["Italy - Sicily onshore"],
        BBOX[36.59,12.36,38.35,15.71]]
]

proj_get_area_of_use() does not return the BBOX in the USAGE node.

It seems that USAGE node is not taken account in buildBoundCRS() in io.cpp. Same behavior in the json parser.