View Full Version : Topological Data and 3D Terrain Creation...
04-29-2005, 08:34 PM
How would one go about creating a 3D Model of actual terrain?
(i.e. creating a 3D terrain model of El Dorado County, of California)
Are there Topological Data formats that can be imported into Lightwave?
What sources are there for obtaining the Topological Data?
What Plug-ins would one need to work with the data in Lightwave?
I keep reading of STEM, DEMS and GTOPO30 formats... but I can't figure out what to make of them...
04-29-2005, 09:12 PM
Use 3DEM (http://www.visualizationsoftware.com/3dem.html) with Terragen (http://www.planetside.co.uk/terragen/) - Terragen can then export the terrain in the lightwave format.
3DEM is for importing DEM's (Digital Elevation Models) as well as other formats, then export it to Terragen, then to LW. The problem is finding free DEMS. There are a few places out there where you can find/use free ones, but most will charge.
04-29-2005, 11:07 PM
I won't mind paying a little... the problem is that it looks like the DEMs are scanned at 30sec arcs or with 1 kilometer resolution... I'd like to have 3 inch or 12 inch resolution... and be able to pick an area on the earth about the size of a football field to a city...
Can anyone recommend any good business sources for DEMs, especially ones with highly detailed and selectable DEM options?
04-29-2005, 11:19 PM
I see there is a list of DEM sources here:
Any others to be recommended?
04-30-2005, 10:53 AM
Ah, found link,
maybe u can find something here..
04-30-2005, 01:56 PM
You'll be lucky to find any DEM or deted that scale. The only free stuff avaliable at near that scale is the Space Suttle stuff you can get from NASA/JPL. 3 to 12 inch res would be either military or from probably an aircraft fitted out with a laser - very expensive data. Thousab\nds of dollars per sq Kilometre.
I Don' t use terragen or 3DEM, try MICRODEM, it has a better import function and can save out as a wire in either .dxf or .obj, either can be bought into LW. It also has other functions that allow you to fill in the holes you sometimes get with dted.
You'll find it will be very dense, I did one the other day that was a minute by a minute using french helios data and it was over 100 million poly's.
04-30-2005, 11:21 PM
If you're not on a mac this info may help:
05-01-2005, 05:13 AM
Square kilometer scans at 3inch resolutions for thousands of dollars... what companies do this?
05-01-2005, 07:10 AM
The people I know who do this wont be much help to you as they only operate here in Australia, you need to contact a local company that deals in GIS services, they'll be able to point you in the right direction - but your looking at upto $15000 a kmsq.
05-01-2005, 07:10 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
vBulletin v3.0.5, Copyright ©2000-2013, Jelsoft Enterprises Ltd.