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
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
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14. The Role of Citizen Sensors and VGI (Volunteered Geographic Information) in Linked Data
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
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