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).
Usage
data(fulmar)
Format
This data frame contains the following columns:
year
year of measurement: 1998 or 1999
x
x-coordinate in UTM zone 31
y
y-coordinate in UTM zone 31
depth
sea water depth, in m
coast
distance to coast of the Netherlands, in km.
fulmar
observed density (number of birds per square km)
Author(s)
Dutch National Institute for Coastal and Marine Management (RIKZ),
http://www.rikz.nl/
See Also
ncp.grid
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.
Examples
data(fulmar)
summary(fulmar)
## Not run:
demo(fulmar)
## End(Not run)