This book summarizes in a timely and representative manner research carried out in the CHOROCHRONOS Project, established as an EC funded Training and Mobility Research Network with the objective of studying the design, implementation, and application of spatio-temporal database management systems.The nine coherent chapters by leading research groups are written in a tutorial style, making the research contributions of the project accessible to a wider audience interested in spatio-temporal information processing. Follwing an introductory overview, the book presents chapters on ontologies for spatio-temporal databases, conceptual models, spatio-temporal models and languages, access methods and query processing, architectures and implementation of spatiotemporal DBMS, interactive spatio-temporal documents, and future perspectives.