6/10/2011<br />U.S. Environmental Protection Agency<br />1<br />Linked GeoData<br />#WhereCampDC  2011<br />David G. Smith...
Linked DataWhat’s It All About?<br />Speak the Language of the Web<br />Just as you surf web pages, linked data lets you s...
Linked DataWhat’s The Big Fuss?<br />Business Case Galore<br />Address the non-hierarchical nature of organizations<br />C...
Linked Data Cloud<br />http://richard.cyganiak.de/2007/10/lod/<br />6/10/2011<br />U.S. Environmental Protection Agency<br...
Linked Data Basics<br />Speak the Language of the Web<br />Use URIs as names for things<br />Use HTTP URIs so that people ...
Linked Data Basics<br />Tim Berners-Lee:  5-Star model for publishing data<br />http://www.w3.org/DesignIssues/LinkedData....
Linked Data Basics<br />RDF Structure:<br />Triples, much as one might deal with in graphs and other structures, with arcs...
Linked Data Basics<br />RDF Structure:<br />http://en.wikipedia.org/wiki/Resource_Description_Framework<br />http://www.w3...
Linked Data Basics<br />RDF Structure:<br />Represent the data in a common format, e.g. <br />RDF/XML, <br />Notation-3 (N...
Linked Data Best Practices<br />Machine readable format<br />HUMAN readable descriptions<br />Visibility for search engine...
Linked Data Basics<br />Okay, so how do I use it?<br />Query it, just as you would run a SQL query, i.e. SPARQL<br />“Find...
Linked Data and Geo<br />So is this linked data stuff all unicorns and rainbows?<br />http://en.wikipedia.org/wiki/File:Th...
Linked Data and Geo<br />Linked GeoData<br />Some decisions to be made, complexity-dependent<br />http://www.w3.org/2003/0...
Linked Data and Geo<br />What’s Going On?<br />UK – Ordnance Survey<br />http://data.ordnancesurvey.co.uk/.html<br />6/10/...
Linked Data and Geo<br />What’s Going On?<br />OSM - LinkedGeoData<br />http://linkedgeodata.org/About<br />6/10/2011<br /...
Linked Data and Geo<br />What’s Going On?<br />GeoNames<br />http://www.geonames.org/ontology/documentation.html<br />6/10...
Linked Data and Geo<br />What’s Going On?<br />OGC - GeoSPARQL<br />http://www.opengeospatial.org/projects/groups/geosparq...
Linked Data and Geo<br />What is EPA doing?<br />Facility Registry System<br />Soon:<br />Toxic Release Inventory<br />Sub...
Linked Data Cloud<br />Here’s where the Cloud is…<br />Where Are You?<br />http://richard.cyganiak.de/2007/10/lod/<br />6/...
Thanks/Questions<br />David G. Smith PE PLS<br />USEPA Office of Environmental Information<br />202-566-0797<br />SmithG.D...
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Linked GeoData - WhereCampDC 20110610

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Discussion slides for WhereCampDC Session on Linked GeoData, June 10, 2011

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Linked GeoData - WhereCampDC 20110610

  1. 1. 6/10/2011<br />U.S. Environmental Protection Agency<br />1<br />Linked GeoData<br />#WhereCampDC 2011<br />David G. Smith PE PLS<br />USEPA Office of Environmental Information<br />202-566-0797<br />SmithG.David@epa.gov<br />Twitter:@DruidSmith<br />
  2. 2. Linked DataWhat’s It All About?<br />Speak the Language of the Web<br />Just as you surf web pages, linked data lets you surf data.<br />SOAP was about making the web try to work like applications; REST was about making applications work like the web.<br />Linked Data is about making your DATA work like the web.<br />6/10/2011<br />U.S. Environmental Protection Agency<br />2<br />
  3. 3. Linked DataWhat’s The Big Fuss?<br />Business Case Galore<br />Address the non-hierarchical nature of organizations<br />Combine information sources on the fly<br />W3C standards for interoperability to freely move data<br />US Data Warehouse market in 2010 was $10B<br />http://www.slideshare.net/bhylandwood/bernadette-hyland-semtech-2011-west-linked-data-cookbook<br />6/10/2011<br />U.S. Environmental Protection Agency<br />3<br />
  4. 4. Linked Data Cloud<br />http://richard.cyganiak.de/2007/10/lod/<br />6/10/2011<br />U.S. Environmental Protection Agency<br />4<br />
  5. 5. Linked Data Basics<br />Speak the Language of the Web<br />Use URIs as names for things<br />Use HTTP URIs so that people can look up those names.<br />When someone looks up a URI, provide useful information, using the standards (RDF*, SPARQL)<br />Include links to other URIs, so that they can discover more things.<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />5<br />
  6. 6. Linked Data Basics<br />Tim Berners-Lee: 5-Star model for publishing data<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />6<br />
  7. 7. Linked Data Basics<br />RDF Structure:<br />Triples, much as one might deal with in graphs and other structures, with arcs and nodes – similar to ERDs and Class Diagrams<br />Special sauce: These elements can be identified with URIs – not only makes them unique, it is self-describing and dereferenceable for more information!<br />http://www.w3.org/TR/rdf-concepts/<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />7<br />
  8. 8. Linked Data Basics<br />RDF Structure:<br />http://en.wikipedia.org/wiki/Resource_Description_Framework<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />8<br />
  9. 9. Linked Data Basics<br />RDF Structure:<br />Represent the data in a common format, e.g. <br />RDF/XML, <br />Notation-3 (N3), <br />Turtle (.ttl), <br />N-Triples, <br />RDFa, and <br />RDF/JSON<br />http://en.wikipedia.org/wiki/Resource_Description_Framework<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />9<br />
  10. 10. Linked Data Best Practices<br />Machine readable format<br />HUMAN readable descriptions<br />Visibility for search engines<br />RDFa and microformats<br />voID descriptions - http://vocab.deri.ie/void<br />http://www.slideshare.net/bhylandwood/bernadette-hyland-semtech-2011-west-linked-data-cookbook<br />6/10/2011<br />U.S. Environmental Protection Agency<br />10<br />
  11. 11. Linked Data Basics<br />Okay, so how do I use it?<br />Query it, just as you would run a SQL query, i.e. SPARQL<br />“Find me the capital of all countries in Africa”<br />PREFIX abc: <nul://sparql/exampleOntology#> .<br />SELECT ?capital ?country<br />WHERE {<br /> ?x abc:cityname ?capital ;<br />abc:isCapitalOf ?y.<br /> ?y abc:countryname ?country ;<br />abc:isInContinentabc:Africa.<br />}<br />http://en.wikipedia.org/wiki/Resource_Description_Framework<br />http://www.w3.org/DesignIssues/LinkedData.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />11<br />
  12. 12. Linked Data and Geo<br />So is this linked data stuff all unicorns and rainbows?<br />http://en.wikipedia.org/wiki/File:The_Hunt_of_the_Unicorn_Tapestry_7.jpg<br />6/10/2011<br />U.S. Environmental Protection Agency<br />12<br />
  13. 13. Linked Data and Geo<br />Linked GeoData<br />Some decisions to be made, complexity-dependent<br />http://www.w3.org/2003/01/geo/<geo:lat_long>51.4,-0.02</geo:lat_long><br />GeoRSS<br />GML<br />WKT<br />WorldKit<br />http://www.w3.org/wiki/GeoRDF<br />6/10/2011<br />U.S. Environmental Protection Agency<br />13<br />
  14. 14. Linked Data and Geo<br />What’s Going On?<br />UK – Ordnance Survey<br />http://data.ordnancesurvey.co.uk/.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />14<br />
  15. 15. Linked Data and Geo<br />What’s Going On?<br />OSM - LinkedGeoData<br />http://linkedgeodata.org/About<br />6/10/2011<br />U.S. Environmental Protection Agency<br />15<br />
  16. 16. Linked Data and Geo<br />What’s Going On?<br />GeoNames<br />http://www.geonames.org/ontology/documentation.html<br />6/10/2011<br />U.S. Environmental Protection Agency<br />16<br />
  17. 17. Linked Data and Geo<br />What’s Going On?<br />OGC - GeoSPARQL<br />http://www.opengeospatial.org/projects/groups/geosparqlswg<br />6/10/2011<br />U.S. Environmental Protection Agency<br />17<br />SELECT ?f<br />WHERE { ?f my:hasPointGeometry ?fGeom .<br />?fGeomogc:asWKT ?fWKT .<br />FILTER (ogcf:relate(?fWKT,<br />“<http://www.opengis.net/def/crs/OGC/1.3/CRS84><br />Polygon ((-83.5 34.0, -83.5 34.3, -83.1 34.3,<br />-83.1 34.0, -83.5 34.0))”^^ogc:WKTLiteral,<br />ogc:within))<br />}<br />
  18. 18. Linked Data and Geo<br />What is EPA doing?<br />Facility Registry System<br />Soon:<br />Toxic Release Inventory<br />Substance Registry<br />Collaborating<br />CIO Committee DAS<br />SOCOP http://socop.org/<br />HHS, USGS<br />http://www.w3.org/2011/gld/charter<br />6/10/2011<br />U.S. Environmental Protection Agency<br />18<br />
  19. 19. Linked Data Cloud<br />Here’s where the Cloud is…<br />Where Are You?<br />http://richard.cyganiak.de/2007/10/lod/<br />6/10/2011<br />U.S. Environmental Protection Agency<br />19<br />
  20. 20. Thanks/Questions<br />David G. Smith PE PLS<br />USEPA Office of Environmental Information<br />202-566-0797<br />SmithG.David@epa.gov<br />Twitter:@DruidSmith<br />6/10/2011<br />U.S. Environmental Protection Agency<br />20<br />

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