1. Ordnance Survey & Ontologies Dr John Goodwin

2. Ordnance Survey and Linked Data

3. disconnected (DC) externally connected (EC) equal (EQ) partially overlapping (PO) tangential proper part (TPP) tangential proper part inverse (TPPi) non-tangential proper part (NTPP) non-tangential proper part inverse (NTPPi) a b PO(a,b) a b EC(a,b) a b EQ(a,b) a b DC(a,b) a b TPP(a,b) b a TPPi(a,b) a b NTPP(a,b) b a NTPPi(a,b) Region Connection Calculus

4. Spatial Relations DCDisjoint EC Touches EQ Equal PO Partial overlaps TPP Within TPPi Contains NTPP Within NTPPi Contains

5. Semantics in OWL Spatial RelationsCharacteristics disjointsymmetric touchessymmetric partiallyOverlapssymmetric equalssymmetric, transitive, reflexive containstransitive withintransitive property Ο equals → property equals Ο property → property within Ο disjoint → disjoint disjoint Ο contains → disjoint partiallyOverlaps Ο within → overlaps contains Ο touches → connected Etc…

6. Administrative Geography ObjectProperty: inCounty SubPropertyOf: within Characteristics: Functional Range: County or GreaterLondonAuthority ObjectProperty: ward SubPropertyOf: contains SubPropertyChain: district o ward Range: UnitaryAuthorityElectoralDivision or Ward

7. Class: District SubClassOf: CivilAdministrativeArea, ward some DistrictWard, inCounty exactly 1 County

8. Geometry Should complex geometries, e.g. Polygons etc. be stored in the graph? Feature Geometry PolygonLine Point extent asGML XML Literal