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https://issues.apache.org/jira/browse/JENA-1740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16913789#comment-16913789
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Greg Albiston commented on JENA-1740:
-------------------------------------
Hi Timo,
The work from geosparql-jena is now available as a module in Jena. It should be
possible to switch the dependency with only the package names needing updating,
i.e. `io.github.galbiston.geosparql_jena` to `org.apache.jena.geosparql`.
<dependency>
<groupId>org.apache.jena</groupId>
<artifactId>jena-geosparql</artifactId>
<version>3.12.0</version>
</dependency>
>From what I recall the PostGIS functions in some cases overlap with the
>GeoSPARQL functions, which focuses on spatial relations. This is due to both
>in part being derived from the Simple Features standard, but where GeoSPARQL
>was designed for open system of SPARQL and PostGIS for closed system of SQL.
Something that the PostGIS functions also seem to offer is an extensive range
of functions to manipulate geospatial data.
The raster data functionality mentioned is not considered in GeoSPARQL. Others
might be able to answer better whether raster data is ideally suited for
encoding in RDF, storing in a triplestore and querying (doesn't raster data get
large very quickly while potentially having a lot of similarity between cases?)
or whether some cross-reference lookup to another datastore is needed.
Hopefully this a useful and accurate enough generalisation of some differences
between GeoSPARQL and PostGIS.
Thanks,
Greg
> Extending Apache Jena with more geospatial functions
> ----------------------------------------------------
>
> Key: JENA-1740
> URL: https://issues.apache.org/jira/browse/JENA-1740
> Project: Apache Jena
> Issue Type: Improvement
> Reporter: Timo Homburg
> Priority: Minor
>
> Hello,
> I am the developer of a project which I named postgis-jena
> (https://github.com/i3mainz/postgis-jena), originally aimed at extending
> JenaARQ with query functions common in databases such as POSTGIS but now
> going beyond that approach and also integrating support for raster data
> (still WIP). I am building up work being done by Greg Albistons extension
> geosparql-jena.
> Is this extension of interest for Apache Jena as a plugin or in another
> context?
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