An OGC standard that is of relevance to this is the Table Joining Standard [1]. Before a name change this was called geolinking and concerned the linkage of geodata. (Forgive me, I am yet to familiarise myslef with the geoSPARQL specification, so this may all be well considered in that and I need not have pointed it out...)
Andy http://www.geog.leeds.ac.uk/people/a.turner/ [1] http://www.opengeospatial.org/standards/tjs ________________________________ From: [email protected] [[email protected]] On Behalf Of Frans Knibbe [[email protected]] Sent: 11 July 2011 09:21 To: public-lod Cc: John Goodwin Subject: Re: OGC seeks public comment on GeoSPARQL It was a good idea to post this announcement here! At the moment it is not really possible to publish geographical data in the Linked Data cloud. Well, there is the Basic Geo vocabulary from the W3C, and it is widely used, but it does not allow coding geometries other than points, and it does not allow for arbitrary coordinate systems. There is a wealth of rich geographical data out there, but it is mostly still locked up in silos. A standard like this could change that. I really hope that some Linked Data experts can find some time to assess this candidate standard, and help the geospatial community on its way to 'splendid assimilation'. Regards, Frans On 2011-07-08 14:57, John Goodwin wrote: The Open Geospatial Consortium (OGC®) seeks public comment on the candidate OGC “GeoSPARQL: A Geographic Query Language for RDF Data” Standard. The candidate OGC GeoSPARQL standard defines spatial extensions to the W3C's SPARQL protocol and RDF query language. SPARQL is a protocol and query language for the Semantic Web. SPARQL is defined in terms of the W3C's RDF data model and will work for any data source that can be mapped into RDF, which potentially includes sources of geospatial data. The OGC GeoSPARQL standard supports representing and querying geospatial data on the Semantic Web. GeoSPARQL provides the foundational geospatial vocabulary for linked data involving location and defines extensions to SPARQL for processing geospatial data. This standard serves as a common target for vendors to implement and provides rich functionality for building geospatial applications. GeoSPARQL follows a modular design. A core component defines top-level RDFS/OWL classes for spatial objects. A geometry component defines RDFS data types for serializing geometry data, RDFS/OWL classes for geometry object types, geometry-related RDF properties, and non-topological spatial query functions for geometry objects. A geometry topology component defines topological query functions. A topological vocabulary component defines RDF properties for asserting topological relations between spatial objects, and a query rewrite component defines rules for transforming a simple triple pattern that tests a topological relation between two features into an equivalent query involving concrete geometries and topological query functions. The candidate OGC GeoSPARQL Standard documents are available for review and comment below. http://www.opengeospatial.org/standards/requests/80 John Dr John Goodwin Research Scientist, Research, Ordnance Survey Adanac Drive, SOUTHAMPTON, UK, SO16 0AS Phone: +44 (0) 23 8005 5761 www.ordnancesurvey.co.uk<http://www.ordnancesurvey.co.uk>| [email protected]<mailto:[email protected]> Please consider your environmental responsibility before printing this email This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Adanac Drive Southampton SO16 0AS Tel: 08456 050505 http://www.ordnancesurvey.co.uk
