A list with 8 components:
$rect
is a vector of coordinates \((xmin,ymin,xmax,ymax)\) of the origin and the opposite corner of a 110 by 90 m rectangular plot.
$tri1
is a list of vertex coordinates \((ax,ay,bx,by,cx,cy)\) of contiguous triangles covering the denser part of the plot.
$tri2
is a list of vertex coordinates \((ax,ay,bx,by,cx,cy)\) of contiguous triangles covering the sparser part of the plot.
$poly1
is a list of vertex coordinates \((x,y)\) of the polygon enclosing BPoirier$tri1
.
$poly2
is a list of two polygons vertex coordinates \((x,y)\) enclosing BPoirier$tri2
.
$trees
is a list of tree coordinates \((x,y)\).
$species
is a factor with 3 levels \(("beech","oak","hornbeam")\) corresponding to species names of the trees.
$dbh
is a vector of tree size (diameter at breast height in cm).