rowid,zoom_level,tile_column,tile_row,tile_data
4426,15,16363,22027,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/4426.blob?_blob_column=tile_data
8707,15,16363,22028,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/8707.blob?_blob_column=tile_data