spatstat.data (version 3.1-9)

waka: Trees in Waka national park

Description

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 squawre. Coordinates are given in metres, while the dbh is in centimetres.

Usage

data(waka)

References

Balinga, M., Sunderland, T., Walters, G., Issembe', 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

data(waka)
  if(require(spatstat.geom)) {
plot(waka, markscale=0.01)
title(sub="Tree diameters to scale")
plot(waka, markscale=0.04)
title(sub="Tree diameters 4x scale")
   }