Journal Editorial Boards
Journal of Spatial Information Science (since its foundation in 2009)
Applied Ontology (since 2007)
International Journal of Spatial Data Infrastructures Research (since 2006)
Spatial Cognition and Computation (since 2002)
The ISPRS Journal of Photogrammetry and Remote Sensing (2001-2002)
Journal of Geographical Systems (since 1999)
Interacting with Computers (1992-2002)

Occasional research proposal reviewer for
German Science Foundation (DFG)
European Commission Framework Programmes
Austrian National Bank
Swiss National Science Foundation (SNF)
US National Science Foundation (NSF)
Canadian Research Council (CNR)