{'watch_mapfile': False, 'paletted': True, 'cache_force': False, 'format': 'png', 'max_failures': 6, 'max_zoom': 20, 'debug': False, 'cache_path': '/home/dane/projects/chile/tiles', 'envelope': Box2d(-20037508.0,-20834066.975,20037508.0,19240949.025), 'watch_interval': 2, 'caching': True, 'buffer_size': 128, 'size': 256}