[Qgis-user] extract slope lower than 25 meters ?

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Good morning,

I have to extract slope lower than 25 meters. But i'm working with SRTM
raster DEM 30 meters resolution...

1/ Is there a tool with qgis in order to extract slope values? 

2/ According to you, is it possible to extract 25 meters slope values with
srtm 30 meters. if it is not the case, do you know another way? Another DEM
more acurate for instance? 

Thank you very much.  



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