waka
Trees in Waka national park
This dataset is a spatial point pattern of trees recorded at Waka National Park, Gabon. See Balinga et al (2006).
The dataset waka is a point pattern
(object of class "ppp") containing the spatial coordinates
of each tree, marked by the tree diameter at breast height
dbh.
The survey region is a 100 by 100 metre square.
Coordinates are given in metres, while the dbh is in centimetres.
Usage
data(waka)References
Balinga, M., Sunderland, T., Walters, G., Issemb\'e, Y., Asaha, S. and Fombod, E. (2006) A vegetation assessment of the Waka national park, Gabon. Herbier National du Gabon, LBG, MBG, WCS, FRP and Simthsonian Institution, Libreville, Gabon. CARPE Report, 154 pp. http://carpe.umd.edu/
Picard, N., Bar-Hen, A., Mortier, F. and Chadoeuf, J. (2009) The multi-scale marked area-interaction point process: a model for the spatial pattern of trees. Scandinavian Journal of Statistics 36 23--41
Examples
# NOT RUN {
data(waka)
plot(waka, markscale=0.01)
title(sub="Tree diameters to scale")
plot(waka, markscale=0.04)
title(sub="Tree diameters 4x scale")
# }