The result is now correct. The missing call is
GeoSPARQLConfig.setupMemoryIndex()
source code updated:
https://github.com/jmvanel/semantic_forms/blob/master/scala/forms/src/main/scala/deductions/runtime/jena/GeoSPARLtest.scala#L11
NOTES
- but need to re-index after RDF addition;
- setupMemoryIndex() actually registers special SPARQL predicates,
which is not apparent in method name;
- QUESTIONS:
- how expensive in terms of CPU, elapsed time and storage is
re-indexing?
- how to make re-index automatic?
- is GeoSPARQL indexing compatible with Lucene indexing?
Jean-Marc Vanel
<http://semantic-forms.cc:9112/display?displayuri=http://jmvanel.free.fr/jmv.rdf%23me>
+33
(0)6 89 16 29 52
Le mer. 24 févr. 2021 à 09:17, Jean-Marc Vanel <jeanmarc.va...@gmail.com> a
écrit :
> The Scala code is here;
>
> https://github.com/jmvanel/semantic_forms/blob/master/scala/forms/src/main/scala/deductions/runtime/jena/GeoSPARLtest.scala#L11
> starting with empty TDB 1; just load 2 dbPedia cities with geo:
> coordinates, initialize with
> GeoSPARQLConfig.setupSpatialIndex(dataset)
> and query with spatial:withinBox .
> Alas, the result is empty (see bold line).
>
> Log output :
> 2021-02-24T08:04:14.609Z [run-main-6] INFO o.a.j.g.c.GeoSPARQLOperations
> - Find Mode SRS - Started
> 2021-02-24T08:04:14.633Z [run-main-6] INFO o.a.j.g.c.GeoSPARQLOperations
> - Find Mode SRS - Completed
> 2021-02-24T08:04:14.634Z [run-main-6] INFO
> o.a.j.geosparql.spatial.SpatialIndex - Building Spatial Index - Started
> 2021-02-24T08:04:14.634Z [run-main-6] INFO
> o.a.j.geosparql.spatial.SpatialIndex - Geo predicate statements found.
> févr. 24, 2021 8:04:14 AM
> org.apache.sis.referencing.factory.sql.EPSGFactory <init>
>
> *AVERTISSEMENT: La variable environnementale « SIS_DATA » n’est pas
> définie.*2021-02-24T08:04:14.973Z [run-main-6] INFO
> o.a.j.geosparql.spatial.SpatialIndex - Building Spatial Index - Completed
>
> *?feature*[success] Total time: 5 s, completed 24 févr. 2021 à 08:04:15
>
> If someone wants Java code to try, send me a private mail and I'll write
> it :) .
>
> Jean-Marc Vanel
> <http://semantic-forms.cc:1952/display?displayuri=http://jmvanel.free.fr/jmv.rdf%23me>
> +33 (0)6 89 16 29 52
> Twitter: @jmvanel , @jmvanel_fr ; chat: irc://irc.freenode.net#eulergui
> Chroniques jardin
> <http://semantic-forms.cc:1952/history?uri=http%3A%2F%2Fdbpedia.org%2Fresource%2FChronicle>
>
>
