R: [GRASS-user] Profile and tangential curvatures in r.slope.aspect

[Colin McClean]

As far as I remember this review such methods, but do a search on Ian S. 
Evans too...

Skidmore A.K., 1989. /A comparison of techniques for calculating 
gradient and aspect from gridded elevation data/. Int. Jour. Geograph. 
Inf. Systems, v. 3, 323-334

Cheers
Colin

Hamish wrote:

>>>>Is there a paper (or manual, or tutorial) explaining how
>>>>        
>>>>
>>>profile and tangential curvatures (pcurv and tcurv)are computed in
>>>r.slope.aspect?
>>>      
>>>
>
>  
>
>>from the man page of r.slope.aspect:
>>
>>REFERENCE
>>Horn, B. K. P. (1981). Hill Shading and the Reflectance Map,
>>Proceedings of the IEEE, 69(1):14-47.
>>    
>>
>
>
>This proably applies more to the RST modules, but you might also check
>appendix E.3 "Topograph analysis" of "Open Source GIS: A GRASS Approach"
>by Neteler & Mitasova.
>
>It cites Krocho 1973,1991 and Mitasova and Hofierka 1993.
>
>
>
>Hamish
>
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>


-- 
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Dr Colin McClean
Environment Department
University of York
Heslington
York YO10 5DD
Tel: +44-(0)1904-432995
Fax: +44-(0)1904-432998
http://www.york.ac.uk/environment/
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