SamePlaceAs Linking Locations since 2011
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Transcript of SamePlaceAs Linking Locations since 2011
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SamePlaceAs.orgLinking Locations
since 2011dc:creator Todd Pehle
foaf:mbox tpehle at orbistechnologies .com
foaf:member Orbis Technologies
dc:date December 03, 2010
dbpedia:Event SOCoP Fall Workshop
geonames:locatedIn USGS, Reston, VA
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The Web of Linked Locations is Coming
The Web of Linked Data and the Geo Web are merging
Geographic datasets are being published as RDF
GeoSPARQL soon will offer a way to query geometry and spatial relationships in Linked Data
What then is a next step?
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Link Locations
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Dataset Topology in LOD
LOD datasets will offer peer-to-peer relationships LOD datasets can also offer centralized star topology Centralized connections offer less data, but a wider range of
dataset connections ( “routers” for LOD) A next step: centralized co-ref links; enter SamePlaceAs.org
Domain A Domain BDomain B
“Peer-to-peer” dataset links “Star” Connections of datasets
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SamePlaceAs Server
Simple atomic Linked Data service that takes a URI as input and outputs co-reference URIs for geographic features
Similar to sameAs.org but also allows spatial BBOX queries May have more appropriate name “sameFeatureAs” Service acts as a “graph hopper” offering alternate URIs for
geo feature enabling users to “hop” from graph to graph Cloud-based app built on Google App Engine (no triple store) Service can return CSV, text, JSON, N3, NT, TTL formats Supports Named Graphs for source, lineage, provenance
information
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How to co-ref? Beware of owl:sameAs!
Issues with owl:sameAs are well documented No uniform consensus on resolution of this issue yet; Stay tuned. Perhaps some perspective on confusion over equivalence…
Quantum Mechanics:
“If you are not confused by quantum physics then you haven’t really understood it.” – Neils Bohr
“I think I can safely say that no one understands quantum mechanics.” – Richard Feynman
Quantum Semantics analogs:
“If you are not confused by owl:sameAs then you haven’t fully understood it.”
“I think I can safely say that no one understands owl:sameAs.”
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SamePlaceAs GUI – Search by URI
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SamePlaceAs GUI – Search by BBOX
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SamePlaceAs API
1. URI Search: In = URI; Output all co-reference URIs
2. BBOX Search: In = GeoRSS Box; Output all co-ref URIs in box
3. Deref URI: In = entity or graph URI; Dereferences URI returning RDF
4. Add: In = NT/N3/TTL/CSV; Adds entity + named graph info to KB
5. RemoveURIs: In = URI+Graph URI; Removes URIs from graph
6. RemoveGraph: In = GraphURI; Delete all data from graph
7. UpdateGraph: In = GraphURI+data;Remove graph, then adds
8. MergeSubGraphs: In = URI1,URI2; Conflates into single entity
9. Proof: In = URI1, URI2; Derives how to URIs are connected
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Next Steps
Get service online Scale Testing Load Data Add RDF dump Load More Data Add Community Curation Build the SamePlaceAs Community Load More Data
Questions & Comments are much appreciated!
tpehle @ orbistechnologies dot com