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

[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