This book presents the proceedings of Workshops and Posters at the 13th International Conference on Spatial Information Theory (COSIT 2017), which is concerned with all aspects of space and spatial environments as experienced, represented and elaborated by humans, other animals and artificial agents. Complementing the main conference proceedings, workshop papers and posters investigate specialized research questions or challenges in spatial information theory and closely related topics, including advances in the conceptualization of specific spatio-temporal domains and diverse applications of spatial and temporal information.