This method makes the split

def _make_split(self, ):
        """This method makes the split
        """
        self.area_bbox = self.get_area_bbox(CRS.POP_WEB)
        self._check_area_bbox()

        self.bbox_list = []
        self.info_list = []
        self._recursive_split(self.get_world_bbox(), 0, 0, 0)

        for i, bbox in enumerate(self.bbox_list):
            self.bbox_list[i] = bbox.transform(self.crs)