rowid,zoom_level,tile_column,tile_row,tile_data
8584,15,16503,21957,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/8584.blob?_blob_column=tile_data
9951,15,16504,21957,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/9951.blob?_blob_column=tile_data