Between 2001 and 2004, all Berlin forests (owned by the State of Berlin and managed by the Berlin Forestry Management) were for the first time investigated according to a uniform method in a forest assessment. The most important investigation parameters are the forest address (Forestry Agency, Forestry District, Section, Sub-Section, Plot), species of tree, age-classes, inventory layers, stocking levels (measure for the density of the inventory) and various other parameters relevant for planning. The method has also been carried out in the same manner on areas protected under conservation law; the protected areas (forest areas in state ownership) are also for the most part directly managed by the Berlin Forestry Management.
The operational maps in the scale of 1: 10,000 served as the map basis, with representation of the main tree-species group per plot/subsection, as well as the symbols for mixed tree species of the main stock and the symbols for the tree species of the other inventory layers.
The forest data are updated about every 10 years. The data stock of the forest assessment was checked and adapted in 2010-2011. Annual updates occur based on the available implementation data for individual areas.
The maps and the following evaluations are current as of October 1st, 2014. They include the areas of the Berlin forests that lie in the surrounding area.