The maps of both the urban structure mapping system and those of the actual use mapping system used the block maps of the City and Environment Information System (ISU) as the spatial reference system, and have been updated together. The updated area types were assigned retrospectively to the block sections and block segments shown in the use maps, i.e. sections were not divided based on different area types.
For areas assigned both to the Map Actual Use of Built-Up Areas (06.01) and to Map Green and Open Spaces (06.02) (dual use) the area type is oriented toward the structural use. An exception here is sports use, which is counted as green and open space use, and is always categorized as dual use together with Public facilities/special use. In type categorization, covered and uncovered sports facilities are distinguished, with the latter assigned to the group Open space use area types.
Updating of the geometry and the use data
The updating of the urban structure mapping system is carried out parallel to the revision of the actual use maps of the Environmental Atlas (Actual Use of Built-Up Areas (06.01) and Green and Open Spaces (06.02)).
In addition to the main emphasis update, which is carried out regularly at five-year intervals, the revision for the 2016 Edition focussed on land use and area type checks of the entire database, based on geo-data available in the State of Berlin, Moreover, the admissibility of combinations of various land uses and area types was checked for the entire database.
Comprehensive plausibility checks were carried out. They consisted of a database analysis, under which areas with non-admissible combinations of uses and area types were ascertained and examined, and of an evaluation of various geo-data stocks which have been compiled in recent years at the Senate Department for Urban Development and the Environment and other institutions for various purposes. These data stocks were either already available as block data of the ISU, or else could be merged and compared with the data of the ISU maps, thus providing possibilities which permitted particular cases of use information to be re-examined. For instance, based on existing data on the Site Occupancy Index (SOI), the assignment of the blocks of the area types Commercial/industrial areas with dense or sparse construction could be examined. The SOI indicates the built-up proportion (cf. §19 Sect. 1 Land Use Ordinance (BauNVO)). For this reason, commercial and industrial areas were checked to make sure that their SOI was greater or less than 0.5 (i.e., over-development of more or less than 50 %), respectively, in accordance with their classification as dense or sparse construction.
In the current revision, 7,159 areas of the total of 25,352 contained in the ISU5 block map were checked. Of these, 1,945 areas were assigned to a new use category, and as a result, to a new area type.
In total, 1,346 blocks were assigned a new key, 147 block segments were deleted.