Dear List Members,

I am currently working on some landscape ecology research project where 
I would like to calculate simple landscape metrics (e.g. patch area and 
patch perimeter) based on a realistic landscape representation meaning 
that I would like to do this in a 3d setting :)

What I have:

1.) A raster() with the patches indicated by integer values (created 
with SDMTools->ConnCompLabel() )
2.) A raster() with the same resolution and extent as (1) holding the 
elevation values (Floating Point)

What I need :
  A table with the 2d area and perimeter and with the 3d area and 
perimeter for each patch id

What I found:

I found the implementation of the Jennssen algorithm surfaceArea() which 
I would like to use  (thanx to Barry Rowlingson! ) for the calculation 
of the areas.

But I could not figure out how to get the 3d perimeter of each patch.


I am looking forward to your ideas!

With greetings from Goettingen

P. Magdon


-- 
------------------------------------------------------
MSc. Paul Magdon
*Research Associate*
-Chair of Forest Inventory and Remote Sensing (AWF)-
-Büsgenweg 5, 37077, Göttingen
Burckhardt-Institute
Faculty of Forest Sciences and Forest Ecology
Georg-August-University Göttingen
Phone +49 551 39 9835
Fax   +49 551 39 9787
pmagdon@gwdg.de / skype: paul.magdon


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