spatstat (version 1.31-3)

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

Usage

data(waka)

source

Nicolas Picard

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/resources/Documents/

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)
plot(waka, markscale=0.005)
title(sub="Tree diameters to scale")
plot(waka, markscale=0.02)
title(sub="Tree diameters 4x scale")