Measure tool and other map tools not working correctly with DEM service

[JerryGarcia]

The measure tool and other map tools do not appear to work correctly with some DEM layers. 

At a certain scale, it appears these map tools will use the DEM.  Is there a way to turn off this feature and use these tools without the DEM? 

Thanks!

Releated post:
Thread: Image Service with DEM not displaying correctly
http://forums.arcgis.com/threads/37755-Image-Service-with-DEM-not-displaying-correctly?p=127703#post...