[GRASS-user] problems with r.cost

[Paul Haverkamp]

Thanks Jerry,

I'll look into this.  I realized that I'm running on a 64 bit machine, so
the memory really shouldn't be an issue.  So I'll check out the recompile.

thanks,

paul


> One thing to try if you haven't already is to recompile grass with large
> file support included. I don't know why that's not done automatically but
> apparently it isn't.
> 
> Another, if region size is really the issue and you are a C programmer or
> know one, is to modify the make file of a grass add-on called
> r.terracost.
> It was written as a CS project at Bowdoin at a time when grass was at
> version 5.3. With the move to version 6, the make process changed
> slightly.
> The r.terracost files are available at
> http://www.bowdoin.edu/~ltoma/research.html
> 
> Or you could get grass5.3 and run r.terracost with it.
> 
> Regards, Jerry
> 
> -----Original Message-----
> From: grassuser-bounces at grass.itc.it
> [mailto:grassuser-bounces at grass.itc.it]
> On Behalf Of Paul Haverkamp
> Sent: Wednesday, May 23, 2007 12:45 PM
> To: Hamish
> Cc: grassuser at grass.itc.it
> Subject: Re: [GRASS-user] problems with r.cost
> 
> 
> Hi Hamish,
> 
> Thanks for getting back to me.
> 
> I am using 6.2.1, and g.region -p gives the info:
> 
> projection: 1 (UTM)
> zone:       10
> datum:      nad83
> ellipsoid:  grs80
> north:      4269999
> south:      4180119
> west:       598614
> east:       651978
> nsres:      3
> ewres:      3
> rows:       29960
> cols:       17788
> cells:      532928480
> 
> I'm trying to run with the resolution of 3m, but when I change it to 30m,
> there isn't a problem.  Using much smaller regions doesn't seem to have
> this problem.  So is the file just too large at too small of a
> resolution?
>  I'll try to run Spearfish and let you know.
> 
> thanks again,
> 
> paul
> 
> 
> > Paul Haverkamp wrote:
> > > 
> > > i'm a very new user to grass and am using r.cost in grass6.2.  i'm
> > > trying to run a cost analysis on my raster and having some
> difficulty.
> > 
> > which version of 6.2? 6.2.0 or 6.2.1?
> > 
> > how big is your region? (g.region -p) Does it happen if you make the
> > region smaller or adjust the resolution?
> > 
> > can you reproduce it using the Spearfish demo dataset? if so, can you
> > post instructions with that in the grass bug tracker?
> > 
> > 
> > thanks,
> > Hamish
> > 
> 
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