I was checking the import of USGS DEM's and followed the info in the manual, and unchecked the resize and center box in the options, but when I tried to import two adjacent 1:24000 scale DEM's they still ended up centred on top of eachother and not in their true geographic relationship. Is this a bug or am I missing something? I converted the new USGS SDTS files to the native ascii format for import to Vue4, and there is no loss of data, so I can't understand why it doesn't understand the positioning in the file. The manual mentions the terrain offset dialog box but I didn't see that come up. Also noticed that my Vue4 extras CD did not have any example DEM's as mentioned in the manual !! Is it a problem with using the 1:24000 DEM's and the fact they are in a UTM projection? Any ideas people :) I can still merge the DEM's other ways and create a true-height image, but I'm curious to know why the method in the manual failed for me. Lester