spati2 {lmfor}

Heights and diameters of Scots pine trees in Ilomantsi, Finland.

Description

A dataset of Scots pine tree heights and diameters. The trees were collected on 56 fixed-area sample plots. This is a subset of the larger data set spati.

Usage

data(spati2)

Format

A data frame with 1678 observations on the following 3 variables.

plot

A unique sample plot id.

d

Tree diameter at breast height (1.3 meters above the ground) in cm.

h

Tree height, m.

n

The total number of trees on the plot.

dvar

The variance of tree diameters on the plot.

dmean

The mean of tree diameters on the plot.

Author(s)

The data were collected by Timo Pukkala.

References

Pukkala, T. 1989. Prediction of tree diameter and height in a Scots pine stand as a function of the spatial pattern of trees. Silva Fennica 23(2): 83-99. doi:10.14214/sf.a15532

Mehtatalo, Lauri and Lappi, Juha 2020. Biometry for Forestry and Environmental Data: with examples in R. New York: Chapman and Hall/CRC. 426 p. doi:10.1201/9780429173462

Examples

data(spati2)
fithd(spati2$d,spati2$h,spati2$plot)