The 'Digitale Collectie ErfGeo Enrichment service' takes metadata records from selected collections in Digitale Collectie and attempts to enrich them with geo-coordinates (if not present already), using the HistoGraph.io API. These enrichments (OpenAnnotation in rdf/xml) are accessible through OAI-PMH and can be queried through a JSON(-LD) search API. These APIs are described at http://erfgeo.data.digitalecollectie.nl

A version of this service is running at http://erfgeo.data.digitalecollectie.nl.

For that purpose it was packaged to be installed on the RHEL 6 server on which Digitale Collectie itself runs, which is located at the Netherlands Institute for Sound and Vision. The deps.txt file lists the packages (including required versions) this service depends on. The source code for all of these packages is freely available, much of it at http://github.com/seecr