seals | R Documentation |
This is a single transect of an aereal photo seal pup survey in the Greenland Sea
data(seals_sp)
The data contain these objects:
points
: A SpatialPointsDataFrame
Center locations of the photos
mesh
: An fm_mesh_2d
enclosing the plane's transect
ice.data
: An SpatialPointsDataFrame
with MODIS ice concentration estimates
ice.cv
: An covdata
object with interpolated ice coverage data
Martin Jullum Martin.Jullum@nr.no
Oigard, T. A. (2013) From pup production to quotas: current status of harp seals in the Greenland Sea. ICES Journal of Marine Science, doi.10.1093/icesjms/fst155.
Oigard, T. A. (2014) Current status of hooded seals in the Greenland Sea. Victims of climate change and predation?, Biological Conservation , 2014, 172, 29 - 36.
if (require(ggplot2, quietly = TRUE)) {
ggplot() +
geom_fm(data = seals_sp$mesh) +
gg(seals_sp$points)
}
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