The spatial reference system was provided by the digital block map 1 : 5,000 (ISU 5), edition 2009/12/31. This working map contains the individual statistical blocks with their respective block numbers. Blocks with more than one use are divided into block segments. The numbering and street limit lines of blocks correspond to those used by the State Statistical Agency Berlin-Brandenburg.
Population density was determined for each statistical block and accordingly for block segments. The size of each statistical block, needed for the calculation of population density, was calculated using the equiareal map ISU5 1: 5000 . Figures for the number of inhabitants were assigned to statistical blocks and block segments according to the ISU spatial reference system.