Hi Peter,
The Lakes data is from elevation.fsdf.org.au/ The data there can be downloaded in point cloud format, which Global Mapper loves. Don't get too excited about the Lakes, I'm a first-timer already running into issues
There'a also ELVIS at ga.gov.au/elvis/ but it doesn't export the data in Global Mapper language, as far as I know. I think it works in Terraland, as Larrykuh was able to make height maps. Was there a course you were looking at?
Hey jt83, Only advice I would say is, Leave them alone! I have always had bad luck when removing any of those terrain files.
That's my best advice. I make backups with the CF backup terrain function and I just name them the same name as the Save Scene As option. So if I ever have to go back I can match them both up.
I have several terrain saves in my project folder. Now some may have different advice but hey, you can't go wrong if you don't remove them.
Peace
Thanks axe, yeah saving the scene and terrain at the same time is a note I made going through the tutorials.