Yadgar wrote:
> 
> Hi Tracers!
> 
> My first serious attempt at an Afghan landscape (to those of you
> familiar with the country, it's the lower Arghastan plain about 30 miles
> south-east of Kandahar...)... after weeks of arduous manual pixeling
> work on a scanned b/w 1:300.000 topographic map of the area, I finally
> got together a preliminary 16bit heightfield of 198 by 500 pixels, each
> pixel representing a square with sides of 25.4 meters. Of course, I also
> wanted a realistic surface texture - and that's where many problems
> begin.
> 

The most common method is to use satellite or aerial photography and
classify them according to a set of surface types.  

Some info on this can be found for example in:

http://www.cs.utah.edu/vissim/papers/snowTerrain/

You can also try to conclude the information from the terrain geometry
like done in:

http://www.graphics.lcs.mit.edu/~boh/Projects/snowGenFinalWrite.html

for snow, but without further information this will be very inaccurate.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

Post a reply to this message