Setup the discrete spatial grid for the HMM
setup.grid(locations, res)dataframe of -Locations from WC psat tag
character indicating resolution of grid. 'hycom' is .08 to match hycom reanalysis res. 'quarter' and 'one' are .25 and 1 deg, respectively.
a list
Pedersen MW, Patterson TA, Thygesen UH, Madsen H (2011) Estimating animal behavior and residency from movement data. Oikos 120:1281-1290. doi: 10.1111/j.1600-0706.2011.19044.x