[gdal-dev] Georeferencing Geostationnary (+proj=geos)

[Stéphane]

Hi,

Does anyone know if Gdal, current version or development version, is able to
translate from Geostationnary projection to other regular projection ?

Is it planned in future Gdal release ?

Many thanks !
Stéphane

2010/3/2 António Rocha <antonio.rocha at deimos.com.pt>

> Hi Stéphane
>
> According to http://www.gdal.org/gdal_translate.html
>
> *-a_ullr* /ulx uly lrx lry/:
>   Assign/override the georeferenced bounds of the output file. This
>   assigns georeferenced bounds to the output file, ignoring what would
>   have been derived from the source file.
> Yes... Regarding extracting sub-domains, I didn't tried
>
> Yes, please keep me in touch in case there are better methods
>
> Antonio
>
>
> Stéphane wrote:
>
>> Thanks for feedback !
>>
>> Do you have any ideas of the meaning of -a_ullr arguments they gave you ?
>>
>> Futhermore, once you get your GeoTiff file, did you success to translate
>> it to other projection, or extracting sub domains ?
>>
>> I've heard that GEOS projection is not so really supported currently by
>> GDAL, and re-projection / sub domain extraction doesn't work correctly ...
>>
>> I'll keep you in touch if any news !
>> Stéphane
>>
>> 2010/3/2 António Rocha <antonio.rocha at deimos.com.pt <mailto:
>> antonio.rocha at deimos.com.pt>>
>>
>>
>>    Greetings
>>
>>    I had exacly the same problem. I have been using LSASAF data (from
>>    MSG-2nd Generation satellites) that provides LST and FVC in HDF5
>>    files. For some technical reason they are not goerreferenced and
>>    their  information.
>>
>>    I talked with a few ILWIS software developers and they gave the
>>    following Commands (adapted to my spatial coverage images):
>>
>>    gdal_translate -a_srs "+proj=geos +lon_0=0.0 +h=35785831 +x_0=0.0
>>    +y_0=0.0" -a_ullr -924124.2 5421728.5 4179561.6 3468466.1
>>    "HDF5:"HDF5_LSASAF_MSG_LST_Euro_200802170100"://LST"
>>    "euro_area_georeferenced.tif"
>>
>>
>>    gdalwarp -s_srs "+proj=geos +lon_0=0.0 +h=35785831 +x_0=0.0
>>    +y_0=0.0" -t_srs "+proj=latlong" "euro_area_georeferenced.tif"
>>    "euro_area_latlong.tif"
>>
>>    My HDF5 file doesn't contain any infoprmation regarding GEOS
>>    projection. So, I had to do this
>>
>>
>>    Hope this helps
>>
>>    If you get any news/information/method regarding this, please let
>>    me know
>>
>>    Best regards
>>    Antonio
>>
>>
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>>
>
>
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