geo-ontology for inspire data themes · 2012. 6. 29. · erdoĞdu, gÜler / geo ontology for...

Geo-Ontology for

INSPIRE Data Themes

Msc. Mehmet ERDOĞDU (Noda Information Technologies)

Assist.Prof.Dr. Güler YALÇIN (Osmaniye Korkut Ata University)

June 2012 / ISTANBUL

ERDOĞDU, GÜLER / Geo Ontology for INSPIRE Data Themes

Agenda

• Problem Description

• Scope

• Objective

• Basic Terminology

• Related Previous Work

• Proposed Ontology


Problem Description

INSPIRE

• An Infrastructure for Spatial Information in theEuropean Community

• Declared in 14 March, 2007

• Member countries are obligated to share their non-confidential spatial data through interoperable webservices


Problem Description – cont.

• 34 data themes under 3 Annexes

ANNEX ICoordinate reference systemsGeographical grid systemsGeographical namesAdministrative unitsAddressesCadastral parcelsTransport networksHydrographyProtected sites

ANNEX IIElevationLand coverOrthoimageryGeology

ANNEX IIIStatistical unitsBuildingsSoilLand useHuman health and safetyUtility and governmental Environmental monitoring Production and industrial Agricultural and aquaculture facilitiesPopulation distribution and demography

Area managementNatural risk zonesAtmospheric conditionsMeteorologicalOceanographicSea regionsBio-geographical regionsHabitats and biotopesSpecies distributionEnergy ResourcesMineral Resources


Problem Description – cont.

• More than 100 data layers in 27 different countries

• This large existence of data increases the complexity offinding necessary data

• Almost all the data is domain specific

• A regular citizen cannot benefit without a domainspecific experience.


Scope

Two main problems during INSPIRE Implementation

High complexity of reaching the necessary data.

√ Metadata Catalogs are used for this problem

High domain specific information which prevents a regular user to benefit by.

? Focus on solving data analysis complexity for regular user ?


Objective

• A preliminary solution for easing the query processof geospatial data

• A model ontology vocabulary describing :

Geographical Objects

Geographical Relations


Objective – cont.

http://www.example.org/Hydrography/Rivers#Kizilirmak

http://www.example.org/Hydrography/Sea#Karadeniz

http://.../Hydrography/Relations#EmpitesInto

In other words we will convert human readable queries a machine readable versionto


Basic Terminology

ONTOLOGY

• Onto -> Entity ( In old Greek )

• Defining domain specific entities in terms of their:

TypesRelationsRestrictionsFunctions


Basic Terminology

RDF ( Resource Description Framework )

• A language for representing information about resources in World Wide Web ( W3C )

<rdf:Property rdf:ID="EmptiesInto"><rdfs:domain rdf:resource="#River"/><rdfs:range rdf:resource="#BodyOfWater"/>

</rdf:Property>


Basic Terminology

URI ( Uniform Resource Identifier )• A compact sequence of characters that identifies an abstract or physical resource

ftp://ftp.is.co.za/rfc/rfc1808.txthttp://www.ietf.org/rfc/rfc2396.txtmailto:[email protected]:+1-816-555-1212telnet://192.0.2.16:80/


Basic Terminology

OWL ( Web Ontology Language )

• OWL builds on top of RDF Schema


Basic Terminology

OWL ( Web Ontology Language ) - cont

Has the power of expressing richer properties :

• Symmetric Properties ( If A connects B then B also connects A )• Transitive Properties ( If A is contained in B and B is contained in C then A is contained in C )

• Functional Properties ( At most one value for the property )• Inverse Properties ( if A related to B in a way of relation X, then B is related to A in a way of relation Y. X and Y relations are inversed. )


Basic Terminology


Restrictions in property definitions :

• onProperty : Specifies that on which property the restriction will be applied.• allValuesFrom: Specifies which values are accepted by the property.• hasValue : Specifies which value is the property has to be exactly.• someValue : Specifies that the property has to have at least a value.• cardinality : Specifies the occurrence of the property.• minCardinality: Specifies the minimum occurrence of the property.• maxCardinality: Specifies the maximum occurrence of the property.


Basic Terminology


An OWL class definition

<owl:Class rdf:ID="Kyoto-Protected-River"><rdfs:subClassOf rdf:resource="#River"/><owl:oneOf rdf:parseType="Collection"><geo:River rdf:about="http://www.china.org/rivers#Yangtze"/><geo:River rdf:about="http://www.us.org/rivers#Mississippi"/><geo:River rdf:about="http://www.africa.org/rivers#Nile"/><geo:River rdf:about="http://www.s-america.org/rivers#Amazon"/>

</owl:oneOf></owl:Class>


Related Previous Work

A Geographic Knowledge Base for Semantic Web Applications

• University of Lisbon• Approach for creating and maintaining an geo-ontology• For relating geographical names only• No complete description for spatial relations between features



Semantic Search Engine for

Geographic Data

• CSI Piemonte / Italy• Focused on describing a conceptual model to improve the data usefulness

• Ontology equivalent to metadata catalog• No description for spatial relations between features



Semantic Integration of Thematic Geographic Information in a Multimedia

Context

• Phd Thesis in University of Pompeu Fabra / Spain• Working on geodata regarding data classifications.• For instance palm trees etc.• No georeferenced data relation defined• VideoGIS


Proposed Ontology

• The main scope is all INSPIRE applied geographical area

• Within concept of the presentation we will focus on some of the water bodies located in Turkey

River, Sea

Corresponding to Hydrography, Land Cover and Sea Regions themes of INSPIRE Annexes.


Presentation Concept


Proposed Ontology Diagram

WaterSource

FlowingSource WaterBody

Brook River Tributary Lake Sea Brook

Basin Dam


Proposed Ontology ( Some Classes )

Water Source<owl:Class rdf:ID="WaterSource">

<rdfs:subClassOf rdf:resource="#Thing"/></owl:Class>

Water Body<owl:Class rdf:ID="WaterBody">

<rdfs:subClassOf rdf:resource="#WaterSource"/></owl:Class>

Sea<owl:Class rdf:ID="Sea">

<rdfs:subClassOf rdf:resource="#WaterBody"/><rdfs:subClassOf>

<owl:Restriction><owl:onProperty rdf:resource="#FeedingFrom"/><owl:allValuesFrom rdf:resource="#FloatingSource"/>

</owl:Restriction></rdfs:subClassOf>

</owl:Class>


Proposed Ontology ( Some Classes )

Floating Source<owl:Class rdf:ID="FloatingSource">

<rdfs:subClassOf rdf:resource="#WaterSource"/></owl:Class>

River<owl:Class rdf:ID="River">

<rdfs:subClassOf rdf:resource="#FloatingSource"/><rdfs:subClassOf>

<owl:Restriction><owl:onProperty rdf:resource="#EmptiesInto"/><owl:allValuesFrom rdf:resource="#Sea"/><owl:allValuesFrom rdf:resource="#Lake"/>

</owl:Restriction></rdfs:subClassOf>

</owl:Class>


Proposed Ontology ( Properties)Empties Into

<owl:ObjectProperty rdf:ID="EmptiesInto"><rdfs:domain rdf:resource="#River"/><rdfs:range rdf:resource="#WaterBody"/>

</owl:ObjectProperty>

Feeds From<owl:ObjectProperty rdf:ID="FeedsFrom">

<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#InverseFunctionalProperty"/><owl:inverseOf rdf:resource="#emptiesInto"/><rdfs:domain rdf:resource="#WaterBody"/><rdfs:range rdf:resource="#River"/>

</owl:ObjectProperty>

Connects To.....Contained In.....Established On......


Proposed Ontology Diagram ( Cont.)

River Sea

Empties Into Event

Feeding From Event


Defined Objects for POC

• Objects that are subject to this presentation will be specified :Rivers : KızılırmakSea : Black Sea

• RelationsEmpyties Into : Kızılırmak -> Black SeaFeeding From : Black Sea -> Kızılırmak


<River rdf:ID="Kizilirmak"

xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

xmlns="example.org/WaterSource#">

<EmptiesInto rdf:resource="example.org/#BlackSea"/>

<ContainedIn rdf:resource="example.org/#KizilirmakBasin"/>

</River>

<Sea rdf:ID="BlackSea"

xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

xmlns="example.org/WaterSource#">

<FeedingFrom rdf:resource="example.org/#Kizilirmak"/>

</Sea>

Finally – RDF RDF Description


Finally – Graphical Description


Further Proposal

• All INSPIRE data themes needs to be investigated anda general INSPIRE Ontology Language(INSPIRONTOLOGY) needs to be prepared.

• An ontology reading engine should be prepared whichwill read the INSPIRONTOLOGY and producequery results for regular citizens through web searchengines.


Further Proposal Cont.

Annex I

Annex II

Annex III

INSPIRONTOLOGY

Web Search Engines

Regular Users

INSPIRE Ontology Reader

Service


Thank you...

- This is where Kızılırmak empties into Black Sea -

geo-ontology for inspire data themes · 2012. 6. 29. · erdoĞdu, gÜler / geo ontology for...

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