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https://issues.apache.org/jira/browse/JENA-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036841#comment-13036841
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Laurent Pellegrino edited comment on JENA-10 at 5/20/11 2:07 PM:
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> geospatialweb is itself LGPL and it uses spatialindex which is LGPL too
Holy cow, It's a great shame :(
> should we be doing this with property functions or with FILTER functions?
They have just added support for geo-spatial indexing in OWLIM
(http://www.ontotext.com/owlim/geo-spatial) and they also do it by using
property functions. I think it's a good idea to use property functions because
it is more obvious that you are applying a specific behavior when you write
your query.
To deal with geo-spatial data it would be nice to create a particular index
that use a r-tree.
was (Author: lpellegr):
> geospatialweb is itself LGPL and it uses spatialindex which is LGPL too
Holy cow, It's a great shame :(
> should we be doing this with property functions or with FILTER functions?
They have just added support for geo-spatial indexing in OWLIM
(http://www.ontotext.com/owlim/geo-spatial) and they also do it by using
property functions. I think it's a good idea to use property functions because
it is more obvious that you are applying a specific behavior when you write
your query.
> GeoARQ: a geo location property function for ARQ
> ------------------------------------------------
>
> Key: JENA-10
> URL: https://issues.apache.org/jira/browse/JENA-10
> Project: Jena
> Issue Type: New Feature
> Components: ARQ
> Reporter: Paolo Castagna
> Priority: Minor
>
> Similarly to LARQ, we can use Lucene spatial capabilities to provide a
> geo/spatial property function for ARQ.
> An initial and experimental implementation as proof of concept is available
> here: https://github.com/castagna/GeoARQ
> The initial implementation can provide:
> - ?s geoarq:nearby ( lat long ) // lat and long are in WGS 84, results are
> sorted by some "unspecified" score
> - ?s geoarq:nearby ( lat long dist ) // restrict withing dist km from
> (lat,long)
> - (?s ?d) geoarq:nearby ( lat long ) // results are sorted by distance (?d)
> which is made available to the user
> - (?s ?d) geoarq:nearby ( lat long dist )
> - ?s geoarq:within ( lat1, long1, lat2, long2 )
> GeoARQ would be better as a separate module from ARQ (same as LARQ).
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