You're SRTM has geographical CRS (WGS84). You must keep into account when
doing morphological analysis. If you reproject it to a planar projections
(e.g. UTM) the results are correct.

giovanni

2012/4/10 Rudi Thiede <[email protected]>

> I've got a DEM, basically a cut-out of SRTM data. Trying to calculate its
> slope gives me extremely weird output, such that all values are >89 degrees.
>
> Dataset: http://linfiniti.com/~rudi/SRTM.zip
>
> Can anyone confirm? I'm suspecting a local issue though, not the data ...
>
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