spataustria: Tree locations within sample plots in an experimental forest...
In biometrics: A Package for Biometrics and Modelling

spataustria

R Documentation

Tree locations within sample plots in an experimental forest in Austria

Description

The Austrian Research Center for Forests established a spacing experiment with Norway spruce (Picea abies) in the Vienna Woods. In the “Hauersteig” experiment, several tree-level variables were measured within four sample plots over time. The current dataframe has only the measurements carried out in 1944, for all years see biometrics::spatimepsp.

Usage

data(spataustria)

Format

Contains cartesian position of trees, and covariates, in sample plots, as follows:

plot: Plot number.
tree: Tree number.
species: Species code as follows: PCAB=Picea abies, LADC=Larix decidua, PNSY=Pinus sylvestris, FASY=Fagus Sylvatica, QCPE=Quercus petraea, BTPE=Betula pendula.
x.coord: Cartesian position in the X-axis, in m.
y.coord: Cartesian position in the Y-axis, in m.
year: Measurement year.
dbh: Diameter at breast-height, in cm.

Source

Data were retrieved from the paper cited below, where several details might be worth reading. For instance, plot size slightly varies among plots: Plot No. 1=2509.7 m^{2}, Plot No. 2=2474.8 m^{2}, Plot No. 3=2415.9 m^{2}, and Plot No. 4=2482.8 m^{2}.

References

Kindermann G. Kristofel F, Neumann M, Rossler G, Ledermann T & Schueler. 2018. 109 years of forest growth measurements from individual Norway spruce trees. Sci. Data 5:180077 \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1038/sdata.2018.77")}

Examples

data(spataustria)
head(spataustria)
df<-spataustria
oldpar<-par(mar=c(4,4,0,0))
bord<-data.frame(
 x=c(min(df$x.coord),max(df$x.coord),min(df$x.coord),max(df$x.coord)),
 y=c(min(df$y.coord),min(df$y.coord),max(df$y.coord),min(df$y.coord))
 )
plot(bord,type="n", xlab="x (m)", ylab="y (m)", asp=1, bty='n')
points(df$x.coord,df$y.coord,col=df$plot,cex=0.5)
par(oldpar)

biometrics documentation built on March 20, 2026, 5:09 p.m.