A collection of 31 revised full papers from the Conference on Spatial Information Theory, 1997. The volume is divided into sections on topics such as structuring of space, boundaries and gradations, topological models of space, formal models of space, and wayfinding and map interpretation.

Continuous change in spatial regions.- Qualitative representation of change.- Image-schemata-based spatial inferences: The container-surface algebra.- A city metaphor to support navigation in complex information spaces.- Using hierarchical spatial data structures for hierarchical spatial reasoning.- Structuring space with image schemata: Wayfinding in airports as a case study.- Fiat and bona fide Boundaries: Towards an ontology of spatially extended objects.- A representation-oriented taxonomy of gradation.- Classification as an impediment to the reliable and valid use of spatial information: A disaggregate approach.- What maps mean to people: Denotation, connotation, and geographic visualization in land-use debates.- The algebraic structure of sets of regions.- Complex regions in topological queries.- A cognitive assessment of topological spatial relations: Results from an empirical investigation.- Voronoï diagrams on line segments: Measurements for contextual generalization purposes.- A qualitative coordinate language of location of figures within the ground.- Identification of fuzzy objects from field observation data.- Long-term spatial representations from pictorial and textual input.- Feature accumulation and route structuring in distance estimations — An interdisciplinary approach.- The perception and cognition of environmental distance: Direct sources of information.- Improving multi-purpose GIS design: Participative design.- Self-organization, cities, cognitive maps and information systems.- Cognitive requirements on making and interpreting maps.- From knowledge to words to wayfinding: Issues in the production and comprehension of route directions.- Spatial representation for pragmatic navigation.- Partition and conquer.- Supporting emergence in spatialreasoning with shape algebras and formal logic.- Linear constraints: Geometric objects represented by inequalitiesl.- An event-based approach to spatial information.- Geocognostics — A new framework for spatial information theory.- Graphical modelling for geographic explanation.- Experiments using context and significance to enhance the reporting capabilities of gis.- Automatic summarization of radiographic imagery.- An automated system for name placement which complies with cartographic quality criteria: The hydrographic network.- Agent-based simulations of a city dynamics in a gis environment.- A logical approach to incorporating qualitative spatial reasoning into GIS (Extended Abstract).- User interaction in a sketch-based GIS user interface.- Metrical refinement of topological relations.- Approximation of topological relations between fuzzy regions satisfying a linguistically described query.

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