The Ordnance Survey Linked Data contains lots of qualitative spatial information – that is topological relationships between different regions. We have information about what each region contains, is within and touches (e.g. Cambridgeshire touches Norfolk). These relationships were encoded using an Ordnance Survey vocabulary as there was nothing suitable at the time. Since then a new standard has emerged from the OGC called GeoSPARQL. In the long term we would probably like to migrate the OS data over to the GeoSPARQL standard, but to stop third party applications using the data from breaking we decided not to on this release. However, mappings from the OS vocabulary have been made to the GeoSPARQL vocabulary via ‘owl:equivalentProperty’. So each of the spatial relationships now have a link to their equivalent in GeoSPARQL. Please see: contains, within, touches, equals, disjoint and partially overlaps for more details on which properties they are related to in GeoSPARQL.

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