rowid,zoom_level,tile_column,tile_row,tile_data
5167,15,16383,21914,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/5167.blob?_blob_column=tile_data
6717,15,16384,21914,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/6717.blob?_blob_column=tile_data