[GRASS-user] Re: add ons i.evapo.potrad, senay

Thu Oct 2 23:36:38 EDT 2008

Dear Niels,

Debian is a bit far away in the GRASS versioning.
Additionally, i.albedo is included only in the version 7,
which is a development version available on svn.

You could do this if you feel up to it:

Step 1: get grass gis svn version
----------------------------------------
cd /home/niels (assuming this is your user place)
mkdir dev
cd dev
svn checkout https://svn.osgeo.org/grass/grass/trunk grass_trunk
cd grass_trunk
there, copy the attached c7.sh file.

Step 2: Get Debian up it the requirements
-------------------------------------------------
run the script install_grass_debian.txt
by typing "sh install_grass_debian.txt"
where you saved it in your computer

Step 3: Compile GRASS
----------------------------
cd /home/niels/dev/grass_trunk
sh c7.sh
make
make install (this requires you to have root access)

Step 4: Run grass experimental version
-----------------------------------------------
type "grass70"

any help on that please dont hesitate.

many good wishes and good luck,
Yann

2008/10/2 Niels Thevs <thevs at uni-greifswald.de>:
> Dear Yann chemin,
>
> have many thanks for your detailed reply.
>
> Currently, I have GRASS 6.2 in an Debian Environment. When I update to the
> version which includes i.albedo, which one should I choose, experimental
> stable or experimental unstable ?
>
> Best regards
>
> Niels
>
>
> Yann Chemin schrieb:
>
>> Dear Niels,
>>
>> r.albedo is now i.albedo,  few days back it has been moved from
>> AddonsSVN to mainSVN of GRASS.
>>
>> I.evapo.potrad is the potential evapotranspiration from incoming sun
>> radiation, meaning non-water stressed ET. It would be useless in areas
>> where there is any water stress like a desert.
>>
>> i.evapo.SENAY refers to a simple water stress estimation based on
>> temperature from satellite. This has proven useful by Senay (2007)
>> while mapping the whole of Afghanistan at once. We found limitations
>> when dealing with small areas.
>>
>> i.eb.evapfr is certainly going to push you further into water stress
>> sensitivity anaylsis, but for that you'll need to use many GIPE
>> modules, this is why there is a script_generator/ in GIPE directory,
>> it will automatize the set up of all of the modules function into an
>> easy script to perform several evapotranspiration mapping under
>> various water stress estimation systems (various models are in GIPE:
>> i.eb.h_SEBAL95/01, i.eb.h_iter, etc...). However, the script generator
>> is not updated to the latest changes I had to make to integrate those
>> GIPE modules into the main GRASS SVN. So you'll need to run the script
>> generator, and then run the lines one by one to check the changes
>> according to your set up. Once the GIPE modules are integrated into
>> main GRASS, I'll update the script_generator.
>>
>> i.dn2full.l5/7 generates top of atmosphere radiative temperature. You
>> will still need to pull out a correction to get the radiative
>> temperature corrected to skin surface temperature. In very clear and
>> dry conditions, there should be very less correction to make.
>>
>> Transmissivity of the atmosphere is an efficiency factor [0-1] that
>> expresses the loss of radiation from 100% arriving at top of
>> atmosphere. Single-way transmissivity, is a one-way ticket either from
>> top of atmosphere to the skin surface of the Earth or from the skin
>> surface of the Earth to the Top of Atmosphere. Try 0.7 for a start if
>> you do not have cloudiness indices or Angstrom equation
>> parameterization locally.
>>
>> Cheers,
>> Yann
>>
>> 2008/9/29 Niels Thevs <thevs at uni-greifswald.de>:
>>
>>> Dear Yann Chemin,
>>>
>>> have many thanks for your reply regarding i.dn2full.l5/17:
>>>
>>> The background of my question was that we want to calculate
>>> evapotranspiration from desert and semi desert areas. According to your
>>> and
>>> other users' experience, which add on performs better: i.evapo.potrad,
>>> i.evapo.senay, or i.eb.evapfr ?
>>>
>>> Regarding the required input parameter for i.evapo.potrad and
>>> i.evapo.senay,
>>> can I use r.albedo and where do I find it ? Can I derive the surface skin
>>> temperature through i.dn2full.l5/17 ? I was wundering because in the
>>> description for i.dn2full.l5/17 there was written that DN is calculated
>>> into
>>> radiance at top of the athmosphere. Furthermore, what is the single way
>>> transmissivity ?
>>>
>>> Best regards
>>>
>>> Niels
>>>
>>>
>>>
>>>
>>> Yann Chemin schrieb:
>>>
>>>
>>>> Hi Niels,
>>>>
>>>> in grass-Addons/gipe/ there are a couple of functions to get L1b
>>>> Landsat 5/7 into radiant temperature at top of atmosphere.
>>>>
>>>> i.dn2full.l5
>>>> i.dn2full.l7
>>>>
>>>> this corrects standard images having .met standard metadata file or
>>>> NLAPS metadata (.txt) file.
>>>>
>>>> You may try and see if you get to some useful ends.
>>>>
>>>> You may also see some fast method to get surface temperature from this
>>>> product by using emissivity. As it was used for AVHRR 15 years ago.
>>>>
>>>>
>>>> in Grass-Addons, i.landsat.toar may also help you out, but it is a
>>>> long time I have had a look at it.
>>>>
>>>> Cheers,
>>>> Yann
>>>>
>>>> 2008/9/25 Niels Thevs <thevs at uni-greifswald.de>:
>>>>
>>>>
>>>>> Dear Grass users,
>>>>>
>>>>> does anybody have experience with the calibration of the Landsat
>>>>> thermal
>>>>> data ? I have a few ground measurements of temperature (air temperature
>>>>> in 2
>>>>> m above surface) and want to relate them to a corresponding Landsat
>>>>> image
>>>>> (band 6). In the papers which I read there are listed a lot of working
>>>>> steps
>>>>> like calibration for at sensor radiance, surface radiance, etc. Is it
>>>>> necessary to do all those steps or does anybody know a more simple
>>>>> algorithm
>>>>> ?
>>>>>
>>>>> Best regards
>>>>>
>>>>> Niels
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>>
>>>>> -----------------------------------------------------
>>>>> Dr. Niels Thevs
>>>>> Chair of Geobotany and Landscape Ecology
>>>>> Institute of Botany and Landscape Ecology
>>>>> Greifswald University
>>>>> Grimmer Strasse 88
>>>>> 17487 Greifswald
>>>>> Germany
>>>>>
>>>>> Tel.: +49-3834-86-4137
>>>>> Fax:  +49-3834-86-4114
>>>>>
>>>>> -----------------------------------------------------
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> grass-user mailing list
>>>>> grass-user at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>>>>
>>>>
>>>>
>>>>
>>>>
>>> --
>>>
>>>
>>>
>>> -----------------------------------------------------
>>> Dr. Niels Thevs
>>> Chair of Geobotany and Landscape Ecology
>>> Institute of Botany and Landscape Ecology
>>> Greifswald University
>>> Grimmer Strasse 88
>>> 17487 Greifswald
>>> Germany
>>>
>>> Tel.: +49-3834-86-4137
>>> Fax:  +49-3834-86-4114
>>>
>>> -----------------------------------------------------
>>>
>>>
>>>
>>
>>
>>
>>
>
> --
>
>
>
> -----------------------------------------------------
> Dr. Niels Thevs
> Chair of Geobotany and Landscape Ecology
> Institute of Botany and Landscape Ecology
> Greifswald University
> Grimmer Strasse 88
> 17487 Greifswald
> Germany
>
> Tel.: +49-3834-86-4137
> Fax:  +49-3834-86-4114
>
> -----------------------------------------------------
>
>
>

-- 
Yann Chemin
International Rice Research Institute
Office: http://www.irri.org/gis
Perso: http://www.freewebs.com/ychemin
YiKingDo: http://yikingdo.unblog.fr/
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apt-get install grass -y
apt-get install flex byacc -y
apt-get install libncurses5-dev libz-dev -y
apt-get install libreadline5-dev -y
apt-get install libjpeg-dev libtiff-dev -y
apt-get install libgdal1-dev python-gdal -y
apt-get install tcl8.5-dev tk8.5-dev -y
apt-get install libsqlite3-dev -y
apt-get install xlibmesa-gl-dev xlibmesa-glu-dev -y
apt-get install fftw3-dev -y
apt-get install gfortran -y
apt-get install libxmu-dev -y
apt-get install swig -y
apt-get install colorgcc -y
apt-get install colormake -y
apt-get install libavcodec-dev -y
apt-get install libavutil-dev -y
apt-get install liblapack3gf libblas3gf liblas-dev liblapack-dev -y

#Dependencies for QGIS Sources

#apt-get install libqt4-core libqt4-dbg  \
#  libqt4-dev libqt4-gui libqt4-qt3support libqt4-sql lsb-qt4 qt4-designer \
#  qt4-dev-tools qt4-doc qt4-qtconfig uim-qt gcc libapt-pkg-perl resolvconf -y

#apt-get install gdal-bin libgdal1-dev libgeos-dev proj \
#  libgdal-doc hdf4-tools python-dev \
#  libgsl0-dev g++ libjasper-dev libtiff4-dev subversion \
#  libsqlite3-dev sqlite3 ccache make libpq-dev flex bison cmake txt2tags \
#  python-qt4 python-qt4-dev python-sip4 sip4 python-sip4-dev -y

apt-get install aptitude -y
aptitude install grass grass-dev gdal-bin -y

aptitude install libfreetype6-dev python-wxgtk2.8 libwxgtk2.8-dev python-dev -y