[GRASS-dev] r.sim.water at debug level 5

[Soeren Gebbert]

Hello,
IMHO your region resolution is much to large for r.sim.water:
33008x33443 cells -> 1.1 billion cells.
You can use a coarse resolution or you can split your dataset in
smaller pieces for computation.

r.sim.water loads all raster maps into your memory and creates
additionally a maximum of 7000000 walkers. I would suggest to use
about 1000000 cells for computation.

Best
Soeren

2010/9/8 Hanlie Pretorius <hanlie.pretorius at gmail.com>:
> Hi,
>
> I've been posting about problems with r.sim.water. I have compiled
> GRASS64 SVN with debugging symbols and set the GRASS DEBUG environment
> variable to level 5. I'm also running GRASS from gdb.
>
> I ran r.sim.water on a region with 1103886544 cells and it bombed out
> quickly. The output was:
> -----
> GRASS 6.4.0svn (c83a_tm_29deg_e):~ > r.sim.water --overwrite
> elevin=c83a_dem_25m at PERMANENT
> dxin=c83a_dem_25m_clipped_dx at rsimwater_toetse
> dyin=c83a_dem_25m_clipped_dy at rsimwater_toetse
> rain=rain_50 at rsimwater_toetse infil=infilt_0 at rsimwater_toetse
> manin=manning_0.05 at rsimwater_toetse
> depth=depth_1mres_rain50_infil0_niter10 at rsimwater_toetse
> disch=disch_1mres_rain50_infil0_niter10 at rsimwater_toetse
> D2/5: G__read_Cell_head
> D2/5: G__read_Cell_head_array
> D3/5: region item: proj:       99
> D3/5: region item: zone:       0
> D3/5: region item: north:      -3122229.69982072
> D3/5: region item: south:      -3155672.30728643
> D3/5: region item: east:       -33474.90929218
> D3/5: region item: west:       -66483.27873573
> D3/5: region item: cols:       33008
> D3/5: region item: rows:       33443
> D3/5: region item: e-w resol:  1.00001119
> D3/5: region item: n-s resol:  0.99998826
> D3/5: region item: top:        0.5
> D3/5: region item: bottom:     -0.5
> D3/5: region item: cols3:      33008
> D3/5: region item: rows3:      33443
> D3/5: region item: depths:     1
> D3/5: region item: e-w resol3: 1.00001119
> D3/5: region item: n-s resol3: 0.99998826
> D3/5: region item: t-b resol:  1
> D3/5: rain_val is set to: -999.990000
>
> D3/5: manin_val is set to: -999.990000
>
> D3/5: infil_val is set to: -999.990000
>
> default nwalk=-2087194208, rwalk=2207773088.000000
> Killed
> -----
>
> Since GRASS itself doesn't exit abnormally, gdb doesn't seem to notice
> that anything is wrong.
>
> Is there anywhere else (a log file perhaps) where I can try and find
> out what is going on?
>
> Thanks
> Hanlie
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