vlad

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Web GIS andamp; Semantic Web Services Vlad Tanasescu @ KMi for the the 2nd AKT DTA Symposium Aberdeen, UK, January 23, 2006 Supervision team: John Domingue, Enrico Motta Thanks to: DIP project, Jon Bryant (BT Research), Alessio Gugliotta (KMi)

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GIS?

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Geographical Information System

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‘dedicated software for digitized geographical data’ Philippe Rigaux, Michel Scholl, and Agnes Voisard, Spatial Databases with Application to GIS, Morgan Kaufmann, 2002

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A GIS is MORE than a mapping tool

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SELECT C1.Name, R1.Name FROM City C1, River R1 WHERE Distance(C1.Shape,R1.Shape) andlt;= ALL (SELECT Distance(C2.Shape) FROM City C2 WHERE C1.Name andlt;andgt; C2.Name)

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Semantic Web Services?

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The Semantic Web

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Web (URI, HTML, HTTP) Web Services (UDDI, WSDL, SOAP, REST) Semantic Web (RDF, OWL) Semantic Web Services Dynamic Static Syntax Semantics

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Objectives that a client wants to achieve by using Web Services Semantic description of Web Services: Capability (functional) - Interfaces (usage) Provide the formally specified terminology of the information used by all other components Connectors between components with mediation facilities for handling heterogeneities WSMO MEDIATORS GOALS WEB SERVICES ONTOLOGIES

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Client Services IRS-III

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Web GIS?

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NO… proprietary data multiple formats common user needs

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But lot of Web Maps!

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Web Maps APIs: a revolution?

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Quite!

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Popularity?

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Limits? data heterogeneity lack of semantics expressiveness

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So? spatial ontologies semantic web services build a semantic web GIS

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Spatial ontologies are… ‘special’

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Objects vs Places vs Fields Boundaries as entities? Level of detail ‘Naïve Geography’ etc

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SGIS: a multi layer architecture

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DIP WP9 Scenario: Snowstorm Emergency Planning

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Capture user practices Goal oriented Weather spatial specifics Merge heterogeneous data etc

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Weather Hazards Details Identify affected roads information Identify affected airport Information Identify suitable shelter and rest centres Identify locations of rescue options GOALS

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WEB SERVICES

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WEB FRONT-END

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Thanks Again, also to: the DIP WP9 team, Jon Bryant (BT Research) and Alessio Gugliotta (KMi)