rowid,zoom_level,tile_column,tile_row,tile_data
225,12,2014,2800,http://datasette-tiles.staging.planning.data.gov.uk/battlefield/tiles/225.blob?_blob_column=tile_data
226,12,2028,2800,http://datasette-tiles.staging.planning.data.gov.uk/battlefield/tiles/226.blob?_blob_column=tile_data
247,12,2027,2800,http://datasette-tiles.staging.planning.data.gov.uk/battlefield/tiles/247.blob?_blob_column=tile_data