[GRASS-user] Cut/Fill Analysis

[Stuart Edwards]

I've used GRASS to run preliminary quantities for a landfill design -  
It works quite well.  Create a DEM that represents your proposed  
grades and then using mapcalc you can figure the cuts and fills  
relative to the existing topography.  Then you can easily compute the  
volumes.  If you want to balance the cut/fill, remember that there is  
a bulking factor on excavated material (say, 1.3X) and compaction of  
the fill (if any) needs to be considered.   Rasterizing the proposed  
cut and fill surfaces can be a tedious process if there's a lot of  
detail.

I would say that if you have access to a CAD package that does  
earthwork for a living it'll be a lot easier - and quicker.  But at a  
pinch, this is a very useful application of GRASS's many talents.

Stu


On Feb 9, 2009, at 3:06 PM, Frank Aragona wrote:

> Grass Community,
>
> Anybody in the community have experience using grass for creating  
> cut-fill maps a la Arc/Info
>
> (http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=Cut/Fill 
> )
>
> I have xyz coordinates for my current site.  I'd like to input a  
> desired slope, and have the GIS output the areas where earth needs  
> to be moved and areas where earth needs to be added, with perhaps  
> volume estimates as well.
>
> Thanks in advance,
>
> -- 
> Frank Aragona
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