[GRASS-user] r.hazard.flood

[Margherita Di Leo]

Hi Leo,


On Fri, Jul 4, 2014 at 11:37 AM, Leo Kris Palao <lk.palao at gmail.com> wrote:

> Dear GRASS users,
>
> I want to use r.hazard.flood module of GRASS but could not get it to work.
> I am running it in the command console. My expression is:
> r.hazard.flood map=myanmar_dem_modis flood=flood mti=mti
>
> Below is the error that I am getting. I have also r.area installed.
>
> The projection of my Map is in Sinusoidal. I have my GRASS installed via
> the OSGeo4W installer, as I use this method to install QGIS.
>
> I am using Windows 7 Professional OS 64-bit
> My GRASS version is 6.4.3
>
> Another question: Is there a GUI for this module in the Windows version of
> GRASS?
>
> Thanks,
> -Leo
>
> Error message:
> r.hazard.flood map=myanmar_dem_modis flood=flood mti=mti
>
> Cellsize : 118.28096836
> SECTION 1a (of 4): Initiating Memory.
> Current region rows: 17433, cols: 17539
> ERROR: G_malloc: unable to allocate 2448854040 bytes of memory at
> init_vars.c:134
> WARNING: Subprocess failed with exit code 1
> WARNING: category information for [r_accumulation] in [LPalao] missing or
> invalid
> Flow accumulation done.
> Slope raster map <r_slope> complete
> Slope map done.
> Exponent : 0.143767534008
> MTI threshold : 3.84762844534
> Calculating MTI raster map..
> Invalid map <r_accumulation>
> Parse error
> ERROR: An error occurred while running r.mapcalc
> (Fri Jul 04 17:21:32 2014) Command finished (1 min 23 sec)
>

This log suggests that r.watershed, called by r.hazard.flood, is not able
to finish the job due to lack of memory. Could you please check if the
computational region is set correctly and then if you can run r.watershed
separately?
The GUI for this module should be available on the fly as any other
modules.. what if you type r.hazard.flood --ui ?

Cheers,
madi

>


-- 
Best regards,

Dr. Margherita DI LEO
Scientific / technical project officer

European Commission - DG JRC
Institute for Environment and Sustainability (IES)
Via Fermi, 2749
I-21027 Ispra (VA) - Italy - TP 261

Tel. +39 0332 78 3600
margherita.di-leo at jrc.ec.europa.eu

Disclaimer: The views expressed are purely those of the writer and may not
in any circumstance be regarded as stating an official position of the
European Commission.
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