Thinning points

The thinning points enable varying thinning types for simulation. The thinning rate in relation to tree diameter by species is defined by a piece wise continuous line. The flexibility of the line depends on the number of parameters, the thinning points.

Just one thinning point produces constant thinning rate over diameter classes. The picture shows optimum solutions for the same problem with varying thinning definition (Valsta 1992). Note how the depiction based on just a few thinning points approximates the exact solution (12 points which match the 12 diameter classes in the stand at time of thinning).