Method to find ???if map data is available or not???

Discussion created by prasannarb on Feb 10, 2013
Latest reply on Feb 11, 2013 by stevel
I am using Arcgis javascript api 3.2. I use the mapservice, 

I realized that map data is not available when the scale(slider) is zoomed to the fullest at certain places on the map. Is there a method to find out if map data is available or not? Could you please share the steps in doing so.