rowid,zoom_level,tile_column,tile_row,tile_data
5531,15,16505,21952,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/5531.blob?_blob_column=tile_data
10414,15,16506,21952,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/10414.blob?_blob_column=tile_data