September 04, 2012, 11:55:41 pm
Thanks for the info and link on USGS. Last time (many moons ago) I visited them for terrain DEMs trying to get any sort of info was a bit of a mission in itself. Seems the data is much more accessible now and thats made it easy to use. Importantly, all the data is now corrected data so there's no need to fix wholes etc.
I also had a look at Earth Explorer where you can get DEMs as well. They all need level/brightness adjusting way up to be useful.
The GeoTIFF or other greyscale image provided by Global Data Explorer using ASTER data is directly useable in Lumion via import terrain bitmap, so thats good. Some images may need cropping and other adjustment depending on area required in Lumion and area defined in the GDE, but will of course only be used for the 2x2km terrain area in Lumion.
To create larger terrains, Lumion requires importing of the area as a mesh. Importing the bitmap into a DCC that converts to a mesh such as Infrastructure, Max, Carrara, and SkUp will do it too with the terrain plugin (yet to test), and then exporting/importing to Lumion will create a mesh based terrain in Lumion, pre-scale or use the default pixel to meter that the DCC uses to convert to mesh.
Web: Lumion NZ