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(Submission #336)
This research studies the metadata use of the Dutch National Geo Register (NGR). The NGR is the national INSPIRE platform of the Netherlands and holds more than 8000 metadata records. Around 2000 metadata are manually edited and the remaining records are harvested from other geo-portals within the Netherlands. NGR is maintained by the Dutch Kadaster and aims to be the central platform for the provision and distribution of geo-information within the Netherlands. Metadata contributes to interoperability by providing a description of spatial datasets and services, which enables users to find data and deduce its use (INSPIRE metadata regulations. 2016; Manso et al. 2009). The NGR uses the Dutch metadata profile based on the ISO11915/11919 and INSPIRE metadata regulations to describe datasets and services. An alternative metadata profile is GeoDCAT-ap, which holds an RDF vocabulary to facilitate metadata interoperability between data catalogues on the web (GeoDCAT. 2016) and enables the conversion to Linked Data. Linked Data uses RDF vocabulary and triples to link and describe the relation between data/objects from different sources (Bizer et al. 2009; Folmer et al. 2014). Linked Data provides an alternative way to disseminate spatial data on the web and brings multiple contexts of data across borders and sections together. Through INSPIRE the Dutch geo community is directed to use the Dutch metadata profile. The European Data Portal (EDP) uses geoDCAT-ap for describing metadata-sets and allows an ISO input that is converted to geoDCAT-ap (EDP. 2016). The Dutch metadata profile is qualitatively a more informative profile but the uprise of GeoDCAT-ap and Linked Data provides means to increase metadata interoperability and discoverability. Metadata interoperability is achieved by the use of metadata standards or harmonization/transformations between different metadata standards (Longhorn. 2005). Currently metadata is lacking interoperability across sectors and borders. The purpose of this research is to connect the metadata use of NGR with the existing XSLT transformation from ISO19139 to GeoDCAT-ap (iso-19139-to-dcat-ap. 2016) and study if the transformation facilitates the use of metadata elements and/or if there will be a loss of information between transformations. In order to harvest metadata-sets and convert metadata to other formats, it is important to have knowledge about the transformations between different metadata profiles and if metadata quality is preserved and/or improved. This research holds information over the opportunities GeoDCAT-ap and Linked Data offer to the NGR while considering user needs and INSPIRE guidelines.
Topic Area: [2.1] Transnational SDI projects Abstract Type: Oral Presentation
Comments: metadata, interoperability, GeoDCAT, Linked Data
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