[jira] [Commented] (JENA-2254) Custom long/lat spatial predicate pairs for geosparql

["Andy Seaborne (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-2254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17477413#comment-17477413 ] 

Andy Seaborne commented on JENA-2254:
-------------------------------------

Hi [~oyvind.gjesdal] - what custom properties do the external datasets use?

> Custom long/lat spatial predicate pairs for geosparql
> -----------------------------------------------------
>
>                 Key: JENA-2254
>                 URL: https://issues.apache.org/jira/browse/JENA-2254
>             Project: Apache Jena
>          Issue Type: New Feature
>          Components: GeoSPARQL
>            Reporter: Øyvind Gjesdal
>            Priority: Minor
>
> At the moment geosparql supports many of the old jena-spatial functions. 
> The jena-spatial module also had custom long/lat and also custom WKT predicates. At the moment we still use the old jena spatial module, but when the assembler file for geosparql is ready in  jena 4.4, I think we can switch.
> Writing an assembler which uses both jena-text and geosparql is how we've mostly used the jena-spatial module.
> One remaining issue we have in our data (from external datasets), is custom long/lat predicates. Bringing support for these would be nice. I tried to look at the code, and it seems the geo:long,geo:lat are translated in https://github.com/apache/jena/blob/main/jena-geosparql/src/main/java/org/apache/jena/geosparql/configuration/GeoSPARQLOperations.java#L749
> Would it work/be enough to look up/reuse the jena-spatial assembler predicates, and also loop through these pairs in the *convertGeoPredicates(Dataset dataset, boolean isRemoveGeoPredicate)* or should there be a new method to convert custom predicates? 
> This is how the old assembler looks, from the jena-site:
>  
> {code:java}
>   # custom geo predicates for 1) Latitude/Longitude Format
>     spatial:hasSpatialPredicatePairs (
>          [ spatial:latitude :latitude_1 ; spatial:longitude :longitude_1 ]
>          [ spatial:latitude :latitude_2 ; spatial:longitude :longitude_2 ]
>          ) ; {code}
>  
>  
>  



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