[GRASS-user] How to get perimeter?

[Margherita Di Leo]

Hi List,

I'm searching for a way to delineate the perimeter of an area in a 
raster map. The area is like the result of r.clump, so it is 
caracterized by a integer number in the raster map. I have no problem in 
trasforming the raster map in vector with r.to.vect, but the vector is 
an area, not a line. I need to know the lenght of the contour of the 
areas. What is the best way to obtain that?

Thank you in advance

Margherita

-- 
Eng. Margherita Di Leo
Ph.D. Student 
Methods and Technologies for Environmental Monitoring
Department of Environmental Engineering and Physics (DIFA)

University of Basilicata 
Campus Macchia Romana
85100 - Potenza 
Italy

Office: +39-0971205363
Fax: +39-0971205160
E-mail: dileomargherita AT gmail DOT com
Skype: dileomargherita
URL: http://www.difa.unibas.it/A_Manager_PP.do?azione=visualizzaHomePage&id=106