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Geographic information in govt linked data

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Geographic Information in Government Linked Data W3C Government Linked Data F2F 29 June 2011 Todd Pehle tpehle (at) orbistechnologies.com
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Emerging Web of Linked Locations
Linked Locations ,[object Object],[object Object],Orbis Technologies, Inc. Cartographic Projection GeoSPARQL Spatial Reasoning LOD Spatial Projection
Building the World’s Spatial KB Geo Web has base vector layers (GIS Data) to be connected to Web of Linked Data. Linked Locations inter-connects Geo Web features & bridges Linked Data with Geo Web. Linked Data exposes thematic attribution & relationships of Linked Locations. Linked Data + Geo Web Geo Web Links (horizontal links) (vertical links)
The Role of Government SDI (Spatial Data Infrastructure) in Linked Data
Spatial Data Infrastructure (SDI) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Linked Spatial Data Infrastructure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Examples of SDI (Cited in Wikipedia)
Importance of Government Linked SDI to Linked Open Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Bootstrapping LOD with Government Linked SDI (LSDI) Government LSDI Base Raster Layers Government LSDI Core Vector Layers Government LSDI Contextual Overlays
The Role of Lightweight Linked Locations in Government Linked Data
Lightweight Linked Locations in Government Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Role of Citizen Sensors and VGI (Volunteered Geographic Information) in Linked Data
Citizen Sensors, NGOs and Linked VGI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],VGI in Haiti: Earthquake Damaged Buildings from Open Street Map
Geo Vocabularies & Tools Needed in Government Linked Data
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Lack of Common Geo Vocabularies in the Web of Linked Data ,[object Object]
GeoSPARQL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example GeoSPARQL Query SELECT ?airport WHERE { ?airport rdf:type :Airport . ?airport :hasPointGeometry [ ogc:asWKT ?aPointGeom ] FILTER(ogcf:distance(?aPointGeom, “ POINT(-122.4192 37.7793)”^^ogc:WKTLiteral, ogc:km) <= 100) } Example Query: Find airports within 100 KM of San Francisco :SemTech2011 :locatedIn :SanFrancisco . :SanFrancisco :hasPointGeometry [ ogc:asWKT “POINT(-122.4192 37.7793)”^^ogc:WKTLiteral ] . Example Data: SemTech 2011 is located in San Francisco
Example GeoSPARQL: Features Contained In User-Defined Polygon GeoSPARQL enables rich spatial queries over RDF Example Query : Find tourist attractions contained in Capitol Mall area in Washington D.C.
The Linked Locations Core? GeoSPARQL Spatial Relations Events Feature Types Metadata Note: Citizen Sensor “Observations” are separate but make use of these core models
Linked Locations Tools & Best Practices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thanks!

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Geographic information in govt linked data

  • 1. Geographic Information in Government Linked Data W3C Government Linked Data F2F 29 June 2011 Todd Pehle tpehle (at) orbistechnologies.com
  • 2.
  • 3. The Emerging Web of Linked Locations
  • 4.
  • 5. Building the World’s Spatial KB Geo Web has base vector layers (GIS Data) to be connected to Web of Linked Data. Linked Locations inter-connects Geo Web features & bridges Linked Data with Geo Web. Linked Data exposes thematic attribution & relationships of Linked Locations. Linked Data + Geo Web Geo Web Links (horizontal links) (vertical links)
  • 6. The Role of Government SDI (Spatial Data Infrastructure) in Linked Data
  • 7.
  • 8.
  • 9. Examples of SDI (Cited in Wikipedia)
  • 10.
  • 11. Bootstrapping LOD with Government Linked SDI (LSDI) Government LSDI Base Raster Layers Government LSDI Core Vector Layers Government LSDI Contextual Overlays
  • 12. The Role of Lightweight Linked Locations in Government Linked Data
  • 13.
  • 14. The Role of Citizen Sensors and VGI (Volunteered Geographic Information) in Linked Data
  • 15.
  • 16. Geo Vocabularies & Tools Needed in Government Linked Data
  • 17.
  • 18.
  • 19. Example GeoSPARQL Query SELECT ?airport WHERE { ?airport rdf:type :Airport . ?airport :hasPointGeometry [ ogc:asWKT ?aPointGeom ] FILTER(ogcf:distance(?aPointGeom, “ POINT(-122.4192 37.7793)”^^ogc:WKTLiteral, ogc:km) <= 100) } Example Query: Find airports within 100 KM of San Francisco :SemTech2011 :locatedIn :SanFrancisco . :SanFrancisco :hasPointGeometry [ ogc:asWKT “POINT(-122.4192 37.7793)”^^ogc:WKTLiteral ] . Example Data: SemTech 2011 is located in San Francisco
  • 20. Example GeoSPARQL: Features Contained In User-Defined Polygon GeoSPARQL enables rich spatial queries over RDF Example Query : Find tourist attractions contained in Capitol Mall area in Washington D.C.
  • 21. The Linked Locations Core? GeoSPARQL Spatial Relations Events Feature Types Metadata Note: Citizen Sensor “Observations” are separate but make use of these core models
  • 22.