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The growing availability of routine observations from§satellite imagery and other remote sensors holds§great promise for improved understanding of processes§that act in the landscape. However, geographers §ability to effectively use such spatial data is§challenged by large data volume and limitations of§conventional data models in geographic information§systems (GIS) which provide limited support for§querying and exploration of spatiotemporal data other§than simple comparisons of temporally referenced§snapshots. Current GIS representations allow§measurement of change but do not address coherent§patterns of change that reflects the working of§geographic events and processes. The work presented§here includes three self contained but related§studies: (1) development of a representational§framework that incorporates spatiotemporal properties§of geographic phenomena, (2) development of a§framework to characterize events and processes that§can be inferred from GIS databases, and (3)§development of a method to assess similarity of§events and processes based on the temporal sequences§of spatiotemporal properties.