In the doc it is mentioned that the default value for "maximumLevel" is 18 but in TileMapServiceImageryProvider.js it says that the default value is 10
that._maximumLevel = defaultValue(description.maximumLevel, parseInt(tilesets[tilesets.length - 1].getAttribute('order'), 10));
I tried running my without explicitly defining maximumLevel. In chromes console, it shows 404 for images with <url>/8/* and there were no requests sent for images in folders greater than <url>/8/* which means the default value is 8. Can anyone look into it?