[GRASS-user] Strange r.slope.aspect output of Aster dem : slope calculations

[Matthias Rumitz]

... sorry, if this has alredy been considered:
http://gis-lab.info/docs/aster-report-v3.pdf


Am 23.12.2013 10:44, schrieb Moritz Lennert:
> On 20/12/13 16:54, manuel.martin wrote:
>> Hi all,
>> I just computed the slope using r.slope.aspect on the Aster data over
>> the full French territory, and as a result got large artefact stripes on
>> a south west-north east axe? When could it come from (inadequate
>> re-projection, the slope routine or the aster data)?
>>
>> The stripped result :
>> https://www.dropbox.com/s/fcxaei1be9wsmka/slopeFranceSmall.png
>> https://www.dropbox.com/s/b52k5co46ujmpt7/slopeFrance.jpg
>
> Could these stripes be related to the ASTER satellite's path ?
>
> See the map of Terra paths here: 
> http://www.science.aster.ersdac.jspacesystems.or.jp/en/about_aster/calendar/index.html
>
> Moritz
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