In one of the presentations at the recent Wildlife Society meeting, a presenter had a density surface map based on activity centers which had been obtained using methods in Gardner et al (2010). I am interested in whether it is possible to do something similar using the secr package in R. Borchers and Efford (2008) describe "home range centers", which sound equivalent to the "activity center" from Gardner et al (2010), though Gardner et al use Bayesain methods instead of likelihood methods.
I found the help file "Modelling density surfaces in secr" and have been looking through it. The possom model includes a quadratic density surface and one based on distance to shore. Is it possible to create a density surface based on the "home range center"? Is there a way to obtain the x, y coordinates for the "home range centers"?