thanks for all the help, I have learned much by experimenting and I will figure this out.

All the guys: About the subject read_dem.exe, I need a help, how put read_dem to work. The commands or where I can get more info.And more: what read_dem really does? Thanks. Celso

I have a file that I downloaded labeled.3827972.DEM.SDTS.TARIs this a DEM file and if it is not how do I transform it into one so I can use the READ DEMO.exeThanks

BUMP