How can I read a .img DEM in ArcGIS, i.e. extract elevations in all (random) points?

Discussion created by on Oct 22, 2013
Latest reply on Oct 25, 2013 by mark909

I'm am working with a DEM, a .img file. I'm using it as a DEM for a civil engineering (hydraulic engineering) design for a certain bay area.
Now I really want to see the elevations of the banks of the bay, at all (random) points. How can I do that? Which tool do I need and what should I do?

I have installed ArcGIS 10.1.

Thanks a lot,