The workshop on Models of Dynamic Geographic Phenomena and Their was designed to bring together cognitive psychologists, geographers computer scientists, and others to discuss theories and methods for understanding dynamic geographic phenomena or for implementing dynamic representations of geographic events. The workshop was held on the University of Pittsburgh campus on October 28-31, 1998. This report summarizes the activities of the workshop, including the discussion of open research questions and awarding of seed grants to participants. Copyright Information: All rights reserved unless otherwise indicated. Contact the author or original publisher for any necessary permissions. eScholarship is not the copyright owner for deposited works. Learn more at http://www.escholarship.org/help_copyright.html#reuse Varenius Workshop Report Cognitive Models of Dynamic Geographic Phenomena and Their Representations Pittsburgh, PA, October 28-31, 1998