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Re: OGC seeks public comment on GeoSPARQL

From: Boris Villazon-Terrazas <boris.villazon@deri.org>
Date: Wed, 13 Jul 2011 10:32:31 +0100
Message-ID: <4E1D662F.3060101@deri.org>
To: Frans Knibbe <frans.knibbe@geodan.nl>
CC: public-lod <public-lod@w3.org>, John Goodwin <John.Goodwin@ordnancesurvey.co.uk>
Hi Fran

On 11/07/2011 9:21, Frans Knibbe wrote:
> It was a good idea to post this announcement here!
Yes, it was .. ;)
> 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.
We have GeoLinkedData [1], which aims to enrich the Web of Data with 
Spanish geospatial data.
We are publishing points and linestrings, and we have two tools for 
supporting these geometries, geometry2rdf [2], and map4rdf[3].

Yes, we have more geospatial information out there, and we hope this 
standard will be a step forward to enrich the Web of Data with more 
geospatial linked data.

> 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'.
We have already provided some comments.



[1] http://geo.linkeddata.es <http://geo.linkeddata.es/>
[2] http://mccarthy.dia.fi.upm.es/geometry2rdf/
[3] http://oegdev.dia.fi.upm.es/projects/map4rdf/
> 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 0ASPhone: +44 (0) 23 8005 5761
>> www.ordnancesurvey.co.uk| john.goodwin@ordnancesurvey.co.uk
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Received on Wednesday, 13 July 2011 09:34:25 UTC

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