One of the advantages of the dwc_area:*Area* encoding, is that it creates one urn for each combination of lat, long, radius.
In practice, this is similar to one urn for each GPS reading.
An alternative way to get the same list would be a query that includes geo:lat, geo:long and radius.
Most people want to think of this as one thing, a point with a PointRadiusSpatialFit- type error measure.
I created this demonstration query that finds the BioBlitz observations with geo coordinates and sorts the resulting data by Observer.
It also allows you to pick and display different *Areas* from the list of returned records. *Note I have only 708 occurrence records with GPS coordinates.
* I still include the geo:lat and geo:long since most toolkits do not understand the proposed ietf.org proposed geo standard.
Screenshots of the Pivot Views and a link for the query itself can be found at this bit.ly bundle http://bit.ly/m6c5hI
Here is the query
REFIX txn: http://lod.taxonconcept.org/ontology/txn.owl# PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# PREFIX dcterms: http://purl.org/dc/terms/ PREFIX foaf: http://xmlns.com/foaf/0.1/ PREFIX cc: http://creativecommons.org/ns# PREFIX time: http://www.w3.org/2006/time# PREFIX geo: http://www.w3.org/2003/01/geo/wgs84_pos#
select distinct ?s, ?o as ?image, ?class, ?order, ?family, ?sciname, ?cname, ?observer, ?lat, ?long, ?area where { ?s rdf:type txn:Occurrence. ?s dcterms:isPartOf < http://lod.taxonconcept.org/ontology/txn.owl#TDWG2010_BioBlitz%3E. ?s txn:class ?class. ?s txn:order ?order. ?s txn:family ?family. ?s txn:hasScientificName ?sciname. ?s cc:attributionName ?observer. ?s geo:lat ?lat. ?s geo:long ?long. ?s txn:occurrenceHasArea ?area. optional {?s foaf:depiction ?o. ?s txn:commonName ?cname. }. }
limit 708
-- Pete ------------------------------------------------------------------------------------ Pete DeVries Department of Entomology University of Wisconsin - Madison 445 Russell Laboratories 1630 Linden Drive Madison, WI 53706 Email: pdevries@wisc.edu TaxonConcept http://www.taxonconcept.org/ & GeoSpecieshttp://about.geospecies.org/ Knowledge Bases A Semantic Web, Linked Open Data http://linkeddata.org/ Project --------------------------------------------------------------------------------------