I wrote about this earlier but I never heard anything back. I have made something that uses the geo vocabulary but also allows pointRadiusSpatial fit measure that I call radius. The advantage is that this adds a standard way to deal use something like an extent or pointRadiusSpatial while still benefiting from the widely used geo vocabulary. It also allows these "Areas" to be referenced in a commonly understood urn way that using a ietf standard. For example: "geo:44.86528100,-87.23147800;u=10" There are still some things I need to fix and check with this vocabulary but I am wondering if there is any interest in incorporating this into the DarwinCore. If not I will probably change the name of the ontology. There are also things in the example below that are not part of my proposal. I have what I call "Areas" that look like this: <dwc_area:Area rdf:about="geo:44.86528100,-87.23147800;u=10"> <dcterms:title>44.86528100, -87.23147800 Radius 10 meters</dcterms:title> <dcterms:isPartOf rdf:resource=" http://lod.taxonconcept.org/ontology/void#this"/> <dcterms:identifier>geo:44.86528100,-87.23147800;u=10</dcterms:identifier> <dcterms:created>2010-10-28T00:00:00-0500</dcterms:created> <dcterms:modified>2010-11-09T16:33:34-0600</dcterms:modified> <geo:lat>44.86528100</geo:lat> <geo:long>-87.23147800</geo:long> <dwc_area:radius>10</dwc_area:radius> <txn:elevation>186.54</txn:elevation> <txn:continent>North America</txn:continent> <txn:countryCode>US</txn:countryCode> <txn:country>United States</txn:country> <txn:stateProvince>Wisconsin</txn:stateProvince> <txn:county>Door</txn:county> <txn:localityText>Town of Sevastopol</txn:localityText> <txn:locationName>Shivering Sands Natural Area Woods</txn:locationName> <txn:areaHasOccurrence rdf:resource=" http://ocs.taxonconcept.org/ocs/f522444a-2dd9-400e-be59-47213ef38cb9#Occurre... "/> <txn:areaHasObservedSpeciesConcept rdf:resource=" http://lod.taxonconcept.org/ses/ICmLC#Species"/> <txn:areaHasIndividual rdf:resource=" http://ocs.taxonconcept.org/ocs/f522444a-2dd9-400e-be59-47213ef38cb9#Individ... "/> <txn:areaInStateProvince rdf:resource="http://sws.geonames.org/5279468/ "/> <txn:areaInCounty rdf:resource="http://sws.geonames.org/5250768/"/> <wdrs:describedBy rdf:resource=" http://ocs.taxonconcept.org/ocs/f522444a-2dd9-400e-be59-47213ef38cb9.rdf"/> </dwc_area:Area> I recently added the following predicates, but have not altered my RDF examples. #featureContainsArea #areaWithInFeature http://lod.taxonconcept.org/ontology/dwc_area.owl OWL Doc http://lod.taxonconcept.org/ontology/dwc_area_doc/index.html The predicates are a bit awkward, but I wanted to be clear that this was to link an "Area" like "geo:44.86528100,-87.23147800;u=10" to a Geonames "Feature". I thought a different set of predicates could be created to deal with some other class of "SpatialThing" if needed. Respectfully, - Pete --------------------------------------------------------------- Pete DeVries Department of Entomology University of Wisconsin - Madison 445 Russell Laboratories 1630 Linden Drive Madison, WI 53706 TaxonConcept Knowledge Base <http://www.taxonconcept.org/> / GeoSpecies Knowledge Base <http://lod.geospecies.org/> About the GeoSpecies Knowledge Base <http://about.geospecies.org/> ------------------------------------------------------------