rowid,zoom_level,tile_column,tile_row,tile_data
4107,15,16223,22499,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/4107.blob?_blob_column=tile_data
5925,15,16222,22499,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/5925.blob?_blob_column=tile_data