To best use a living habitat is the main goal of a proactive planning-process. However consideration must be paid towards environmental conditions. Therefore, it is necessary to keep areas which are threatened by natural hazards free of development. Whether there are existing guidelines or not, depends on the type of natural risk. There are many national and international sources of information on how to control the variables of natural hazards such as floods and avalanches. However, there is a lack of a legal framework and also detailed maps concerning landslides and rock falls. As part of a project of the federal state of Lower Austria, a comprehensive hazard index map for landslide and gravitational processes has been developed. This thesis initially gives an introduction to the subject of natural hazards and then further focuses on the characteristics of landslides and rock falls, and their legal standing. It especially pays attention to the project MoNOE of the federal state of Lower Austria. The goal of the project is to develop comprehensive hazard index maps for slides and gravitational processes. After a literature research on the methods and aims of the "MoNOE" project, the impact on the planning procedures of the Lower-Austrian State has been examined. Interviews following a specific guideline have been conducted with project leaders, employees of the department for local spatial planning, and spatial planners of communities in Lower Austria. Based on the information gained, recommendations for appropriate action have been derived.