Ontology-Based Geospatial Data Integration
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One-Way-Out Evacuation
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One-Way-Out Evacuation Contraflow for Evacuation Traffic Management
On-Line Aggregation Aggregate Queries, Progressive Approximate
Online Generalization Generalization, On-the-Fly
Ontologies Geospatial Semantic Web
Ontology Geospatial Semantic Integration
Ontology, Spatio-temporal Temporal GIS and Applications
Ontology-Based Geospatial Data Integration F REDERICO F ONSECA College of Information Sciences and Technology, The Pennsylvania State University, University Park, PA, USA Synonyms Information integration; Semantic information integration; Heterogeneity; Conflation; Database integration Definition Information integration is the combination of different types of information in a framework so that it can be queried, retrieved, and manipulated. This integration is usually done through an interface that acts as the integrator of information originating from different places. For integration to be efficient and to deliver the kind of information that the user is expecting, it is necessary to have an agreement on the meaning of the information. In a broader scope, it is necessary to reach an agreement about the meaning of the entities of the geographic world. In order for information sharing to happen among different communities in a effective and meaningful way some preconditions are necessary. The concepts that people have about the real world must be explicitly formalized; such an explicit formalization of mental models is called an ontology. Ontology is often seen as an engineering artifact that describes a certain reality with a specific vocabulary, using a set of assumptions regarding the intended meaning of the vocabulary words. In philosophy ontology has a different meaning. For philosophy, ontology is the science that studies what exist
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