I just downloaded the one hightmap from the edc.usgs.gov web site for Canada. But it seems to be messed up and it was not because of anything I’m doing that messed it up, I tried it on two different computers and it was still messed up when opening the dem file in VTbuilder on both computers. all other dems load up ok.
Can someone else try this dem file out
http://edc.usgs.gov/products/elevation/gtopo30/w140n90.html
And let me know if they also are having problems with it, if they are I need to contact the web site and let them know the file is messed up.