Different sources of (geo-) data are used in the project: from satellite images, drone flights, modelling of geological structures based on available resources, in-situ measurements up to survey campaigns using mobile GIS. An important aspect of post-mining research is the continuous monitoring of the mining area to get a full process understanding. With this process understanding, important (postmining) aspects and effects can be derived and fed back into early stages of the mine life cycle. In this article, methods for monitoring post-mining processes will be presented on the example of the closed Prosper-Haniel mine. MethodologyThe article by Pawlik et al. [4] presents the concept of using various methods of geomonitoring of post-mining processes (Figure 4), which include satellite observations, drone flights and in-situ measurements.