[GRASS-dev] Re: [GRASS-user] Curvature in r.slope.aspect

Maciej Sieczka tutey at o2.pl
Sun Nov 19 04:41:20 EST 2006

Glynn Clements wrote:
> Aldo Clerici wrote:
>> I have a very simple question regarding the output of r.slope.aspect.
>> I know that slope and aspect are the first derivatives of elevation and are
>> expressed in degrees, while profile and tangential curvatures are the second
>> derivatives of elevation. What I would like to know is the units in which
>> curvatures are expressed. 
>> In other words, what does it mean a curvature of 0.05? 
> Curvatures will be in 1/metres, e.g. a curvature of 0.05 corresponds
> to a radius of curvature of 20m.

I have added this info to manual. Thanks.

BTW, I noticed an issue with r.slope aspect - it ignores, by desing,
the MASK set. Shouldn't it conform and let use the MASK?


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