[GRASS-user] Making fake dem's

[WolfgangZ]

Markus Neteler schrieb:
> Roger,
> 
> 
> Roger Mason wrote:
>> Hello,
>>
>> I wish to prepare some fake digital elevation models to be used in
>> teaching undergraduate geology.  The idea is to prepare dem's to
>> illustrate the interaction of geology and topography to produce
>> outcrop patterns.  If anyone has suggestions as to which file formats
>> might be easiest to use or which existing libraries for writing such
>> formats could best be intergrated into a C++ program I'd be pleased to
>> receive suggestions.
>>
>> In addition, if anyone has already done what I propose I'd be
>> delighted to benefit from your experience!
>>
>> Thanks,
>>
>> Roger Mason
>>
> 
> take a look at r.surf.fractal which is creating synthetic DEMs
> for you.
> 
> Markus

why not takeing real DEMs? The SRTM dataset is for free and can be used 
with grass.