Not answering your question, but I wanted to point out that there's
some slightly outdated code here implementing spatial search, perhaps
you could use it or coordinate with them and update it for current
DSpace.

https://github.com/DSpace/DSpace/pull/511


Regards,
~~helix84

Compulsory reading: DSpace Mailing List Etiquette
https://wiki.duraspace.org/display/DSPACE/Mailing+List+Etiquette


On Tue, Jul 25, 2017 at 5:06 PM, eneshukic via DSpace Developers
<dspace-devel@googlegroups.com> wrote:
> We are currently trying to implement a custom spatial search for DSpace 6
> Mirage 2 using SOLR. This is our scenario:
>
> 1. We want to have a form with map (OpenLayers) and text field. Users will
> select either rectangle on the map or coordinates inside the text field.
>
> 2. Each item has 4 coordinates (MBR) that are defined inside a separate
> schema (Item is inside a polygon).
>
> 3. After user submits a query all of the items that intersect with a search
> region are returned. This query is search for polygons inside a polygon.
>
>
> We understand that we need JTS library to accomplish this. Is there a place
> were we can put this library inside the source before the build? For now, we
> have been coping this library inside the lib folder on the Tomcat.
>
>
> We would like to perform SOLR query from XMLUI (hint:
> https://wiki.duraspace.org/display/DSPACE/Solr#Solr-Solrqueries). The result
> set would be the same as the regular discovery query. Is this possible? If
> yes, is it better to create a new xml/xsl files or change existing? What
> files need to be changed to accomplish this?
>
>
> Thanks,
>
> Enes
>
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