rowid,zoom_level,tile_column,tile_row,tile_data
6670,15,16510,21942,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/6670.blob?_blob_column=tile_data
8791,15,16509,21942,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/8791.blob?_blob_column=tile_data