[GRASS-user] r.sim.water & time-stepped walkers - additional info
mseibel at gmail.com
Wed May 16 12:15:58 EDT 2007
Here is the actual error message when trying to draw the walker output that
only has one point, "GRASS_INFO_ERROR(26696,1): Cannot open old vector
swwalkers401799 at PERMANENT on level 2"
thought that might be useful info?
On 5/16/07, M S <mseibel at gmail.com> wrote:
> I am still investigating the outputs of various simulations I ran, and may
> eventually answer my own question. However, I am hoping someone with
> experience using this module can provide some insight or guidance.
> First off, the r.sim.water is very cool! Especially an animation sequence
> of walkers I saw in a document online by Helena Mitasova (http://www.ing.unitn.it/~grass/conferences/GRASS2002/proceedings/proceedings/pdfs/Mitasova_Helena_2.pdf
> that referenced this gif animation: (
> However, under various simulations I am getting no walker output for some
> time steps through the simulation. Also, if the simulation is not
> time-stepped no walkers are outputted. Using v.info I am getting one
> point for walker output. If I step through the simulation 10 times, I get
> walker output on the 1st step, the 9th and 10th step, and only one walker
> point for all the other steps. In other simulations that had 8 steps, I
> might have gotten walker output for 2 of the 8 steps.
> I am still tuning the input parameters and checking results. If anyone
> has some suggestions relating to this issue I would greatly appreciate it!
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