[GRASS-user] r.hazard.flood

[Leo Kris Palao]

Hi Madi,

I got it working now. I think that my DEM is so big (one country). I
created a subset and it is now working. Is there a way where I can just
choose my region of interest from my country-wide DEM and then process it?
Right now what I am doing is to clip the DEM to create a subset and process
it.

Hope my query is clear.

Thanks,
-Leo


On Fri, Jul 4, 2014 at 5:45 PM, Margherita Di Leo <diregola at gmail.com>
wrote:

> 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.
>



-- 
*LEO KRIS MARIANO PALAO*
International Rice Research Institute
Website: www.irri.org
Official Email: l.palao at irri.org
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