Eyup! This thread reminds me of GeoLinking thinking in the development of what became the OGC Table Joining Service Standard. Scales and resolutions for the spatial and temporal dimensions, and to some differing extent, the attribute dimension, might be wanted. The entity itself might have multiple spatial and temporal geometries and varied attribute definitions over time, but give the entity definition a URI, then it can be used for further definition. Events like the Olympic games can be interesting to think of in GeoLinking and geographical mapping terms. It can be defined in general and indeed mapped but there is a huge amount of detail in this thing which can be represented as specific parts related to the thing.
The world is full of fuzzy dynamic things, and a geographers craft is partly about generally describing these in physical and more use or resource based ways. I can see a use for a general linked open data base map of the world defined using RDF/XML as a GeoLinking tool. I don't expect this is really very helpful at this stage, but I'm interested. Best Wishes Andy ________________________________ From: geowanking-boun...@geowanking.org [geowanking-boun...@geowanking.org] On Behalf Of sophia parafina [creta.k...@gmail.com] Sent: 25 June 2012 20:34 To: Joshua Lieberman Cc: Lin Clark; geowanking@geowanking.org Subject: Re: [Geowanking] Place taxonomies (was Re: Improving http://schema.org/GeoShape) I ran through an exercise of building a set of common featuretypes by doing a word count on across a number of gazetteer or gazetteer like taxonomies (Geonames, OSM, USGS, etc). I found out that there wasn't much agreement across them even just by simple word counts, let alone agreement on concepts. Despite that, having a taxonomy of featuretypes is handy for search. Jamming a taxonomy into schema.org<http://schema.org>'s Places can become a bit arbitrary at times and it's possible to extend Places. My feeling is that context is key in creating taxonomies. For example, Geonames is good for place featuretypes at the scale of a city and OSM is good for taxonomies of places that people would be interested in while on vacation. It's tough to build a generic taxonomy of places because the context can shift depending on the usage. sophia On Mon, Jun 25, 2012 at 1:10 PM, Joshua Lieberman <j...@oklieb.net<mailto:j...@oklieb.net>> wrote: Sean, I would agree that somehow agreeing on a complete set of global feature types is overambitious, but it is still important to capture local feature concepts and try to express mappings between them, both in space and in time. That said, any progress made in a common core of concepts will make such a set of tasks easier, and Geonames is as good a place as any to start. Perhaps starting by identifying those feature types which have the widest usage within Geonames itself. -Josh On Jun 25, 2012, at 11:58 AM, Sean Gillies <sean.gill...@gmail.com<mailto:sean.gill...@gmail.com>> wrote: Josh (and all), IIRC, in our gazetteering session at the 2011 AAG a panel concluded that the era of global place or feature type taxonomies was over. Do you think that's still a valid conclusion? Should schema.org<http://schema.org> be advised to stay away from this area? On Sat, Jun 23, 2012 at 11:20 AM, Joshua Lieberman <j...@oklieb.net<mailto:j...@oklieb.net>> wrote: ... so what might we say of it in Schema.org<http://Schema.org>? Well, maybe we would say it's an Island? Pretty tough, http://schema.org/Landform has Volcano and Continent but no island. Are there standard medium-sized lists of expected values we should be using here? >From Geonames.org<http://Geonames.org>: ISL island a tract of land, smaller than a continent, surrounded by water at high water ISLET islet small island, bigger than rock, smaller than island. ISLF artificial island an island created by landfill or diking and filling in a wetland, bay, or lagoon ISLM mangrove island a mangrove swamp surrounded by a waterbody ISLS islands tracts of land, smaller than a continent, surrounded by water at high water ISLT land-tied island a coastal island connected to the mainland by barrier beaches, levees or dikes ISLX section of island ISTH isthmus a narrow strip of land connecting two larger land masses and bordered by water Ok so picking from http://schema.org/Place ... let's go with http://schema.org/TouristAttraction. Maybe we'll describe the island, and then use Place's containedIn relation to describe the city (also called Korcula) that's on the island. So, it's a thing of type http://schema.org/TouristAttraction ... it has a 'geo' property pointing to a thing that is of type http://schema.org/GeoShape ... which in turn has a 'polygon' property whose value is the Text, "17.052154541015, 42.984695434571 17.108459472656, 42.969589233399 17.140045166015, 42.962722778321 17.166137695312, 42.942123413087 17.181243896484, 42.929763793946 17.212829589844, 42.922897338868 17.208709716797, 42.898178100587 17.177124023437, 42.898178100587 17.090606689453, 42.895431518555 16.964263916015, 42.911911010743 16.839294433594, 42.87208557129 16.833801269531, 42.888565063477 16.732177734375, 42.895431518555 16.725311279297, 42.892684936524 16.670379638672, 42.910537719727 16.656646728515, 42.896804809571 16.618194580078, 42.927017211915 16.658020019531, 42.95997619629 16.658020019531, 42.962722778321 16.603088378906, 43.001174926758 16.658020019531, 43.008041381837 16.857147216797, 42.979202270508 17.052154541015, 42.984695434571". As discussed earlier, the first and last pairs are identical. I could write this out long-hand in Microdata or RDFa Lite, but the basic model is the key concern. I think we're getting somewhere, thanks for your help! Nearby in the Web, Wikipedia has pages for both island and city, http://en.wikipedia.org/wiki/Kor%C4%8Dula and http://en.wikipedia.org/wiki/Kor%C4%8Dula_(town)<http://en.wikipedia.org/wiki/Kor%C4%8Dula_%28town%29> It's also btw the alleged-birthplace-of http://en.wikipedia.org/wiki/Marco_Polo but let's get the basics working first :) cheers, Dan _______________________________________________ Geowanking mailing list Geowanking@geowanking.org<mailto:Geowanking@geowanking.org> http://geowanking.org/mailman/listinfo/geowanking_geowanking.org -- Sean Gillies _______________________________________________ Geowanking mailing list Geowanking@geowanking.org<mailto:Geowanking@geowanking.org> http://geowanking.org/mailman/listinfo/geowanking_geowanking.org _______________________________________________ Geowanking mailing list Geowanking@geowanking.org http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
