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.
<http://oegdev.dia.fi.upm.es/projects/map4rdf/>
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.
Thanks
Boris
[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.good...@ordnancesurvey.co.uk
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