[GRASS-user] Volumes of intersections

[Adam Dershowitz, Ph.D., P.E.]

I am still somewhat stuck on this.  I have defined a face (3-d area)  
and it seems that very few of the vector functions can do anything  
with a face like that.
Any other suggestions for doing these types of calculation?

Thanks,

--Adam



On Jan 2, 2009, at 5:14 PM, G. Allegri wrote:

> I don't know the latest devlopments on the 3d vector system, but I
> would convert the vector to rasters (2d or 3d) and then use map
> algebra...
>
> giovanni
>
> 2009/1/3 Adam Dershowitz <adershowitz at exponent.com>:
>> Is it possible to use grass to calculate the volume of a part of a  
>> 3-D
>> vector object?
>> What I mean is if I have a mountain, for example, that is defines  
>> in one
>> vector map.  Then, in another map, I define an area (a plane for  
>> example).
>> This represents a slice through the mountain.
>> Is it possible to calculate the volume of the mountain that lies  
>> above the
>> second plane?  (how much rock is above the slice through it?) It  
>> seems like
>> it should be doable, but I am not really sure how to get going.
>> Any suggestions?
>>
>> Thanks,
>>
>> --Adam
>>
>>
>>
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