def load(self, file_key):
        """Load the data."""
        var = self.sd.select(file_key)
        data = xr.DataArray(from_sds(var, chunks=CHUNK_SIZE),
                            dims=['y', 'x']).astype(np.float32)
        data = data.where(data != var._FillValue)
        try:
            data = data * np.float32(var.scale_factor)
        except AttributeError:
            pass
        return data
Load the data.