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*
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