rowid,zoom_level,tile_column,tile_row,tile_data
7459,15,16532,21977,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/7459.blob?_blob_column=tile_data
8040,15,16531,21977,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/8040.blob?_blob_column=tile_data