rowid,zoom_level,tile_column,tile_row,tile_data
8533,15,16503,21956,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/8533.blob?_blob_column=tile_data
9992,15,16504,21956,http://datasette-tiles.planning.data.gov.uk/ramsar/tiles/9992.blob?_blob_column=tile_data