This is a couple hours labor on Sunday having finally used multiple downloads of the terrain to piece together multiple dems and then finally chunking out those dem's and importing them into Vue. A couple of problems I ran into along the way: 1) I'll need to download more versions of each of the pieces of the usgs data as anywhere there's a seam line in the original downloads there needs to be replacement information in another download. 2) Vue WILL align the dem's according to where they are supposed to fall (using an offset) but make sure you import them all in one session, apparently when you start up a new session/file it does not align them with the others it previously imported. 3) Vue WON'T align vertically, so you have to move the terrains up or down as needed in order to align them best BEFORE you rescale up the terrain as a whole (because Vue imports the dems at about 1/2 the scale it should be). 4) Overlap is a must, and seams are inevitable at this point. Until E-on supports larger terrains (thanks war2 for starting that, I've already added my voice) having to chunk them in in this manner is just going to result in a seam somewhere. Anyway, I'm still downloading new versions of the stuff to the west as well as some corner information that appears to be having problems coming in (same error in 3dem I reported earlier). I'll keep this forum posted as I make progress.