The implementation of the IOER Monitor is being carried out in stages. In a first step only the spatial and linear features (transport and river axes) are calculated on the basis of the digital basic landscape model (ATKIS Basis-DLM) as well as building footprints and coordinates supplied by official survey agencies.
Later it is planned to make more complex indicators available by integrating geo and statistical data.
From 2012 indicators on settlement structure based on building data are being successively introduced. These are calculated on the basis of building footprints and coordinates, while for earlier time frames on the basis of a categorization of building floor plans of topographic maps 1 : 25,000 DTK25 or the der DTK25-V berechnet.