Airborne counts of Fulmaris glacialis during the Aug/Sept 1998 and 1999 flights on the Dutch (Netherlands) part of the North Sea (NCP, Nederlands Continentaal Plat).
This data frame contains the following columns:
year of measurement: 1998 or 1999
x-coordinate in UTM zone 31
y-coordinate in UTM zone 31
sea water depth, in m
distance to coast of the Netherlands, in km.
observed density (number of birds per square km)
Dutch National Institute for Coastal and Marine Management (RIKZ)
E.J. Pebesma, R.N.M. Duin, P.A. Burrough, 2005. Mapping Sea Bird Densities over the North Sea: Spatially Aggregated Estimates and Temporal Changes. Environmetrics 16, (6), p 573-587.
data(fulmar) summary(fulmar) ## Not run: demo(fulmar) ## End(Not run)
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