[tlocoh-info] Overlapping Home Ranges

Andy Lyons lyons.andy at gmail.com
Thu Jun 12 16:16:01 CEST 2014

Hi Julia,

Good question. The R script below illustrates how to find the area of 
overlap between isopleths for two individuals. This is relatively easy 
because T-LoCoH saves isopleths (and hulls) as SpatialPolygonDataFrames, 
which is a pretty common format for spatial objects in R so there are a 
lot of packages and functions that can manipulate polygons in this format.


Check that out and let me know if you have any other questions.


On 6/12/2014 8:25 AM, Julia Krejci wrote:
> Dear t-locoh group,
> my name is Julia. I work on home ranges of Northern Bald Ibis and 
> chose t-locoh to analyse them. I have 11 individuals for which I 
> already calculated individual home ranges. Now I wonder if it is 
> possible to "overlap" these home ranges/isopleths to see how similar 
> they are in size but also geographically. Is there a way to do see to 
> which percentage they are similar? I would like to investigate for 
> example if the core areas of the individuals have the same 
> geographical position and similar size.
> Thank you very much for your help,
> Best wishes,
> Julia
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