Web GIS&

Semantic Web Services

Vlad Tanasescu @ KMifor 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)

GIS?

GeographicalInformationSystem

‘dedicated software fordigitized geographical data’

Philippe Rigaux, Michel Scholl, and Agnes Voisard, Spatial Databases with Application to GIS,Morgan Kaufmann, 2002

A GIS isMORE

than a mapping tool

SELECT C1.Name, R1.Name FROM

City C1, River R1 WHERE

Distance(C1.Shape,R1.Shape) <= ALL

(SELECT Distance(C2.Shape) FROM City C2 WHERE C1.Name <> C2.Name)

SemanticWeb

Services?

The Semantic Web

Web(URI, HTML, HTTP)

Web Services(UDDI, WSDL, SOAP, REST)

Semantic Web(RDF, OWL)

Semantic Web Services

Dynamic

Static

Syntax Semantics

Objectives that a client wantsto achieve by using Web Services

Semantic descriptionof Web Services:- Capability (functional)- Interfaces (usage)

Provide the formally specified terminologyof the informationused by all othercomponents

Connectors between componentswith mediation facilities for handlingheterogeneities

WSMO

MEDIATORS

GOALS

WEB SERVICESONTOLOGIES

Client

ServicesIRS-III

Web GIS?

NO… proprietary data multiple formats common user needs

But lot ofWeb Maps!

Web Maps APIs:a revolution?

Quite!

Popularity?

Limits? data heterogeneity lack of semantics expressiveness

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

Spatial ontologiesare… ‘special’

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

SGIS: a multi layer architecture

DIP WP9 Scenario:

SnowstormEmergency

Planning

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

Weather Hazards Details

Identify affected roads information

Identify affected airport Information

Identify suitable shelter and rest centres

Identify locations of rescue options

GOALS

WEBSERVICES

WEBFRONT-END

ThanksAgain, also to: the DIP WP9 team, Jon Bryant (BT Research)

and Alessio Gugliotta (KMi)