gdal.py 文件源码

def read_safnwc(filename):
    """Read MSG SAFNWC hdf5 file into a gdal georeferenced object

    Parameters
    ----------
    filename : string
        satellite file name

    Returns
    -------
    ds : gdal.DataSet
        with satellite data
    """

    root = gdal.Open(filename)
    ds1 = gdal.Open('HDF5:' + filename + '://CT')
    ds = gdal.GetDriverByName('MEM').CreateCopy('out', ds1, 0)

    # name = os.path.basename(filename)[7:11]
    try:
        proj = osr.SpatialReference()
        proj.ImportFromProj4(ds.GetMetadata()["PROJECTION"])
    except Exception:
        raise NameError("No metadata for satellite file %s" % filename)
    geotransform = root.GetMetadata()["GEOTRANSFORM_GDAL_TABLE"].split(",")
    geotransform[0] = root.GetMetadata()["XGEO_UP_LEFT"]
    geotransform[3] = root.GetMetadata()["YGEO_UP_LEFT"]
    ds.SetProjection(proj.ExportToWkt())
    ds.SetGeoTransform([float(x) for x in geotransform])
    return ds