Tripod: a comprehensive system for the management of spatial and aspatial historical objects
Proceedings of the 9th ACM international symposium on Advances in geographic information systems
Formal Ontology in Information Systems: Proceedings of the 1st International Conference June 6-8, 1998, Trento, Italy
Modeling Moving Objects over Multiple Granularities
Annals of Mathematics and Artificial Intelligence
The Nature of Landmarks for Real and Electronic Spaces
COSIT '99 Proceedings of the International Conference on Spatial Information Theory: Cognitive and Computational Foundations of Geographic Information Science
The Design of Everyday Things
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness
Reasoning about RFID-tracked moving objects in symbolic indoor spaces
Proceedings of the 25th International Conference on Scientific and Statistical Database Management
UniModeling: a tool for the unified modeling and reasoning in outdoor and indoor spaces
SSTD'13 Proceedings of the 13th international conference on Advances in Spatial and Temporal Databases
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People's daily lives are situated in both outdoor and indoor space. However, traditional GIS focuses only on outdoor space. Therefore, research on providing a unified model of the two spaces and making the navigation between and within them seamless is important. This study lays the ontological and formal foundations for a model of navigation in a unified outdoor and indoor space. Four levels of ontologies are under construction: upper ontology (being constructing by using and revising those concepts introduced in previous work), domain ontologies (structure ontologies of spaces), navigation task ontology, and application ontologies.