[tlocoh-info] Hull metrics

Andy Lyons lyons.andy at gmail.com
Wed Feb 11 19:32:56 CET 2015

Hi Julia,

That's a good question. It seems you need a way to identify hulls that 
belong to specific sites, and save the site location as an ancillary 
variable (which can then serve as a hull metric). There isn't a function 
currently in the package that can classify points or hulls based on 
their location in space, but we could develop one because I think this 
would have general utility.

How specifically would you want to assign points / hulls to sites? One 
option for defining a site would be with a polygon, either by drawing 
one on the plot window or bringing in a shapefile. Another option would 
be defining a site based on distance from a given location (i.e., a 
circle). After defining the site, would you want to say that any point 
(and thus the hull for that point) that falls within the site? Or would 
you only want hulls whose entire area falls within the site?

Comment from other people welcome also.



>> On Feb 11, 2015, at 5:53 AM, Julia Krejci <julia.krejci at chello.at 
>> <mailto:julia.krejci at chello.at>> wrote:
>> Dear Mailinglist,
>> I’m currently trying to compare hull metrics (nsv and mnlv) of 
>> several individuals and several sites. I want to know how long and 
>> how often individual A visited site 1 and 2 and the same for 
>> individual B. Is there a way to get more accurate values for specific 
>> sites than I can receive from the images? Currently I have just 
>> plotted the hpp with the respective colour code and try to compare 
>> colours but of course that’s not very accurate, also because the 
>> colours only represent ranges of values (like, yellow is 1 – 12, 
>> orange is 12 – 24 and so on).
>> Thank you for every advice!
>> Best wishes,
>> Julia
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