[R] box counting method and other landscape ecology measures

[rohan sadler]

Hi Manuel and Robert,

My understanding is that the fdim library is orientated towards vector 
data filling a space, as opposed to a raster type image. Importantly, I 
utilise the GRASS library interface with the GRASS GIS to import raster 
images that are spatially referenced into R. Hence methods such as 
box-counting and Minkowsky sausage are perhaps more applicable, and 
certainly found more often in the image-analysis/landscape ecology 
literature than the information or correlation dimension.

I have managed to come up with a primitive implementation of the 
box-counting algorithm in the meantime (i'm pleased with it although I 
am a mediocre programmer), and my next step is an adjacency measure - to 
tell me whether I have one big patch or lots of small patches.

I'm working from a few references, but one of the most useful is:
L da F Costa & R M Cesar 2001 Shape Analysis and Classification: Theory 
and Practice. CRC Press. Boca Raton

Thanks for replying

Rohan Sadler




Manuel Castejón Limas wrote:

>Dear Rohan,
>
>Have a look at the fdim library, it may be of interest to you as far as
>fractal dimension
>(or box counting if you prefer) is concerned.
>
>Best wishes,
>
>Manuel Castejon
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>http://www.stat.math.ethz.ch/mailman/listinfo/r-help
>

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