Hello,

In our lab we have an actual mapping problem and maybe there is an R  
solution to it.
Aim is to calculate a surface from calculated data of fine root  
biomass. Therefore a number of single trees (approx. 3000) have been  
sampled. With a function from the literature it is possible to  
estimate the spatial distribution of the fine root biomass of this  
single tree depending on tree species, tree diameter at breast height  
and the distance from the stem. Around each tree something like a  
Gaussian bell curve results.

We thought about creating radial polygons around each tree (the  
radius results from the application of the function), To sample a  
number (depending on the radius) of randomly distributed points  
inside each polygon (with sample.Spatial). To calculate the value of  
fine root biomasss for each of the points (from the formula). And to  
use this points to create the surface.

Is there maybe a better and more straightforward way to do this?

Many thanks for suggestions.
Gerald Jurasinski

——————————————————

Dr. Gerald Jurasinski
Landschaftsökologie und Standortkunde
Institut Management Ländlicher Räume
Agrar- und Umweltwissenschaftliche Fakultät
Universität Rostock
Justus-von-Liebig-Weg 6
18059 Rostock

gerald.jurasinski@uni-rostock.de
http://www.auf.uni-rostock.de/loe
+49 381 4983225 (tel)
+49 381 4983222 (fax)




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