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On Spatial Ontologies GEOINFO 2004

2. You may interrupt me anytime ? . 3. Outline. Motivation On ontologiesOn GIS databases On spatial ontologiesOn logic-based approachesOn conceptual modeling based approaches. 4. Changing Focus. 20th Century: Data Processing21st Century: Data ExchangeThe fundamental issue has become

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On Spatial Ontologies GEOINFO 2004

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    1. 1 On Spatial Ontologies GEOINFO 2004 Stefano Spaccapietra Swiss Federal Institute of Technology at Lausanne (EPFL) http://lbd.epfl.ch The topic of my presentation is Buiding a Multi-Scale Database with Scale-Transition Relationships This resarch is developed at COGIT laboratory of the French national geographic institut with Laurnet Raynal, I, Cécile Lemarié and Jenny Trevisan This research aims is Integrating and Handling geographic data at different scales The topic of my presentation is Buiding a Multi-Scale Database with Scale-Transition Relationships This resarch is developed at COGIT laboratory of the French national geographic institut with Laurnet Raynal, I, Cécile Lemarié and Jenny Trevisan This research aims is Integrating and Handling geographic data at different scales

    2. 2 You may interrupt me anytime …

    3. 3 Outline Motivation On ontologies On GIS databases On spatial ontologies On logic-based approaches On conceptual modeling based approaches

    4. 4 Changing Focus 20th Century: Data Processing 21st Century: Data Exchange The fundamental issue has become Mutual Understanding -->> Explicit Semantics -->> Ontologies (not XML)

    5. 5 An Ontology is ... "An agreed description of a conceptualization" somewhere (could be centralized or distributed) some set of (definitely not necessarily a partition) somehow related terms (ontology = language definition) whose use has to some extent been agreed upon preferably with some explanation of their meaning Ontologies are a means to support semantic interoperability Ontologies are objects of interest (Universe of Discourse), e.g. for ontology management software

    6. 6 Without ontologies ... How do I know how to interpret: Where do you come from ? (domain ambiguity) Geneva (the airport I started from) ? Lausanne or Switzerland (the place I’m living in) ? France (the country I am a citizen of) ? Milano (the place I was born) ? I’ll have a cup of coffee (context dependent) Would you consider paying 10’000 US$ to buy a bad painting ? (term ambiguity)

    7. 7 Simple case: common, shared ontology Needs services to define, store, retrieve, update, … the ontology

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