Spatial structures and developments are conditions for as well as results of social action. Based on human-environment relationships, we examine the spatial organisation of social action in its empirical manifestations (e.g. in the form of changing settlement structures, infrastructure equipment). Processes of social, economic, ecological and cultural change and their respective spatial dimensions are the focus of studies of both urban and rural areas (e.g. demographic change, digitalisation, climate change). Research interests include, for example, change and planning of infrastructures for job-related and leisure-tourist mobility (e.g. accommodation, multi-locality, "micro mobilities"). Problem-oriented empirical and (inter)national comparative analyses are oriented towards the concept of sustainable spatial development.