The Monitor of Settlement and Open Space Development (IOER Monitor) is based on the combined processing of geo base data, geo expert data and statistical data. Indicators are derived from these diverse sources, presented in cartographic and tabular form together with meta-information.
The most important sources of base data are the basic landscape model (ATKIS Basis-DLM), the digital land cover model DLM-DE as well as building footprints and coordinates from the real estate cadastre. This data is supplemented by topographical maps at scale 1: 25,000 (DTK25) from the Authoritative Topographic-Cartographic Information System (ATKIS) dmaintained by the Working Committee of the Surveying Authorities of the States of the German Federal Republic (AdV) Geo expert data on protected areas from the German Federal Agency for Nature Conservation (BfN) is also utilized. In addition, use is made of statistical data at municipal and district level from the Federal Statistical Office bas well as indicators and maps on spatial and urban development (INKAR) from the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR).
The ATKIS Basis-DLM has been enhanced in the transition to the AAA-Modell (Version 6.0). Algorithms used by the IOER Monitor for the calculation of indicators have already been adapted to take account of this new model.