araucaria {datana} | R Documentation |
Stand variables for sampling plots in Araucaria araucana forests in southern Chile.
Description
These are plot-level data from Araucaria araucana-dominated forests in southern Chile. The data are
based on tree-level measurements from fixed-area plots of 1000 m^{2}
, and there are two forest stands.
Usage
data(araucaria)
Format
Contains plot-level variables as follows:
- stand
Stand number.
- plot.no
Plot sample identificator number.
- x.utm
UTM coordinate in X-axis, in km.
- y.utm
UTM coordinate in Y-axis, in km.
- slope
Slope, in %.
- aspect
Aspect, in degrees.
- eleva
Elevation, in msnm.
- nha
Tree density, in trees/ha.
- gha
Basal area, in m
^{2}
/ha.- hdom
Dominant height, in m.
- vha
Gross stand volume, m
^{3}
/ha.- dg
Diameter of the average basal area tree of the plot, in cm.
Source
The data are provided courtesy of Dr Nelson Ojeda (Universidad de La Frontera, Temuco, Chile) and further details can be found in Salas et al (2010).
References
Salas C, Ene L, Ojeda N, Soto H. 2010. Metodos estadisticos parametricos y no parametricos para predecir variables de rodal basados en Landsat ETM+: una comparaciĆ³n en un bosque de Araucaria araucana en Chile. Bosque 31(3): 179-194.
Examples
head(araucaria)
tapply(araucaria$plot.no,araucaria$stand,length)