This is an awesome idea which could be extensively used if implemented (I
would!). Is this going to be a stand-alone project for GSoC? I would be
interested in working in this.
Thanks
~Gyan
On Mon, Apr 15, 2013 at 9:37 AM, Andy Seaborne <a...@apache.org> wrote:
> === Spatial query
> JENA-10
>
> Not all spatial queries are complicated. Many use case are covered by
> provision of a single facility like get all objects within a given radius
> or within a given bounding box. GeoSPARQL which is a complete approach to
> geospatial query but it is complicated and driected more towards the
> specialist, not the average linked data developer with SPARQL knowledge.
>
> This project is to provide a one or two basic geospatial query functions.
>
> Example: return places within 10 kilometers of Bristol UK (which as
> latitude/longitude of 51.46,2.6).
>
> SELECT ?placeName
> {
> ?place spatial:query (51.46 2.6 10) .
> ?place rdfs:label ?placeName
> }
>
>
> We have a similar property function architecture in jena-text [0] so this
> project is to take that concept and apply it to geospatial information.
>
> Lucene spatial could be used for the spatial index. There is a simple
> vocabulary for expressing WGS80 information [1]; there is also the point
> information in WKT [2].
>
> This project is not primarily about geospatial processing; it is concerned
> with the indexing and querying simple, existing geospatial data and
> integration with Fuseki.
>
> [0]
> http://jena.staging.apache.**org/documentation/query/text-**query.html<http://jena.staging.apache.org/documentation/query/text-query.html>
> [1] http://www.w3.org/2003/01/geo/
> [2]
> http://en.wikipedia.org/wiki/**Well-known_text<http://en.wikipedia.org/wiki/Well-known_text>
>
