harborSeal_sf {crawl}

Harbor seal location data updated since Johnson et al. (2008)

Description

The original location data used in Johnson et al. (2008) was geographic (latitude/longitude) (but not explicitly documented) and provided as a simple data frame. This data updates the data to a Simple Feature Collection (as part of the sf package) with the CRS explicitly set.

Format

A Simple Feature Collection with 7059 features and 3 fields.

Time

a numeric vector.

DryTime

a numeric vector.

Argos_loc_class

a factor with levels 0 1 2 3 A B.

geometry

a list column with geometry data; CRS = EPSG:4326

Author(s)

Josh M. London

Source

Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA 7600 Sand Point Way NE Seattle, WA 98115

References

Johnson, D., J. London, M. -A. Lea, and J. Durban (2008) Continuous-time random walk model for animal telemetry data. Ecology 89:1208-1215.