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External References

The field dct_references_s defines external services and references using the CatInterOp approach. The field value is a serialized JSON array of key/value pairs, with keys representing XML namespace URI's and values the URL.

Type Reference URI Enables in GeoBlacklight
Web Mapping Service (WMS) http://www.opengis.net/def/serviceType/ogc/wms Layer preview, layer preview feature inspection, downloads (vector: KMZ, raster: GeoTIFF)
Web Feature Service (WFS) http://www.opengis.net/def/serviceType/ogc/wfs Vector downloads in GeoJSON and Shapefile
International Image Interoperability Framework (IIIF) Image API http://iiif.io/api/image Image viewer using Leaflet-IIIF
Direct download file http://schema.org/downloadUrl Direct file download feature
Data dictionary / documentation download http://lccn.loc.gov/sh85035852 Direct documentation download link
Full layer description http://schema.org/url Further descriptive information about layer
Metadata in ISO 19139 http://www.isotc211.org/schemas/2005/gmd/ Structured metadata in ISO standard expressed as XML
Metadata in FGDC http://www.opengis.net/cat/csw/csdgm/ Structured metadata in FGDC standard expressed as XML
Metadata in MODS http://www.loc.gov/mods/v3 Structured metadata in MODS format
Metadata in HTML http://www.w3.org/1999/xhtml Structured metadata in any standard expressed as HTML
ArcGIS FeatureLayer urn:x-esri:serviceType:ArcGIS#FeatureLayer Previewing of ArcGIS FeatureLayer Service
ArcGIS TiledMapLayer urn:x-esri:serviceType:ArcGIS#TiledMapLayer Previewing of ArcGIS TiledMapLayer Service
ArcGIS DynamicMapLayer urn:x-esri:serviceType:ArcGIS#DynamicMapLayer Previewing of ArcGIS DynamicMapLayer Service
ArcGIS ImageMapLayer urn:x-esri:serviceType:ArcGIS#ImageMapLayer Previewing of ArcGIS ImageMapLayer Service
Harvard Geospatial Library Email Download http://schema.org/DownloadAction Retrieve a file via email from the Harvard Geospatial Library
OpenIndexMap https://openindexmaps.org Provide an index map preview