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Linked Sensor Data


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A number of government, corporate, and academic
organizations are collecting enormous amounts of data provided by environmental sensors. However, this data is too often locked within organizations and underutilized by the greater community. In this paper, we present a framework to make this sensor data openly accessible by
publishing it on the Linked Open Data (LOD) Cloud. This is accomplished by converting raw sensor observations to RDF and linking with other datasets on LOD. With such a framework, organizations can make large amounts of sensor data openly accessible, thus allowing greater opportunity for utilization and analysis.

Authors - Harshal Patni, Cory Henson, Amit Sheth

* First attempt on Linked Sensor Data

Published in: Education
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Linked Sensor Data

  1. 1.
  2. 2. 48th ACM Southeast Conference. ACMSE 2010. <br />Oxford, Mississippi. April 15-17, 2010.<br />Linked Sensor Data<br />HarshalPatni, Cory Henson, Amit P. Sheth<br />Ohio Center of Excellence in Knowledge enabled Computing (Kno.e.sis) <br />Wright State University, Dayton, OH<br />
  3. 3. OUTLINE<br /><ul><li> Application on Linked Sensor Data
  4. 4. What is Linked Sensor Data
  5. 5. Sensor Datasets Generated
  6. 6. Data Generation Workflow
  7. 7. Future Work
  8. 8. Conclusion</li></ul>3<br />
  9. 9. Sensor Discovery Application <br />Weather Station ID<br />Current Observations from MesoWest<br />Weather Station Coordinates<br />Weather Station Phenomena<br />MesoWest – Project under Department of Meteorology, University of UTAH<br />GeoNames – Geographic dataset<br />4<br />
  10. 10. What is Linked Sensor Data<br />Weather Sensors<br />Sensor Dataset<br />GPS Sensors<br />Satellite Sensors<br />Camera Sensors<br />5<br />
  11. 11. What is Linked Sensor Data<br />Recommended best practice for exposing, sharing, and connecting pieces of data, information, and knowledge on the Web using URIs and RDF<br />GeoNames Dataset<br />RDF – language for representing data on the Web<br />locatedNear<br />Sensor Dataset<br />Publicly Accessible<br />6<br />
  12. 12. zn<br />Sensor Datasets<br />LinkedSensorDataset<br /><ul><li>RDF Descriptions of ~20,000 weather stations in US
  13. 13. Average 5 sensors/weather station
  14. 14. Spatial attributes of the weather station
  15. 15. Links to locations in Geonames</li></ul>LinkedObservationDataset<br /><ul><li> RDF descriptions of Hurricanes and Blizzard observations in US
  16. 16. Observations generated by sensors described in LinkedSensorDataset</li></ul>7<br />
  17. 17. Data Generation Workflow<br />O&M2RDFCONVERTER<br />8<br />
  18. 18. Workflow – Phase 1<br />9<br />
  19. 19. Workflow – Phase 2<br />10<br />
  20. 20. Workflow – Phase 3<br />Sensor Ontology<br />Ontology – formal representation of knowledge by a set of concepts and relationship between those concepts<br />
  21. 21. Workflow – Phase 3<br />Figure 1: System Components and Architecture<br />
  22. 22. Workflow – Phase 4<br />Open Source RDF store by OpenLink Software for storing RDF data<br />
  23. 23. Future Work<br />Linking the LinkedObservationDataset to DBpedia (RDF extraction of Wikipedia)<br />Linked Sensor Dataset<br />Spatial<br />Linked Observation Dataset<br />Temporal<br />14<br />
  24. 24. x<br />CONCLUSION<br />Publicly accessible Rich Weather Sensor datasets<br />Datasets are easy to query<br />Able to query Sensors based on location names<br />Built O&M2RDFConverter to generate more publicly accessible sensor datasets <br />15<br />
  25. 25. ACKNOWLEDGEMENTS<br />People <br /><ul><li> Joshua Pschorr</li></ul> Air Force Research Lab<br /> Wright-Patterson Air Force Base<br />16<br />
  26. 26. QUESTIONS<br />17<br />
  27. 27. TERMINOLOGY<br />Semantic Web – is an extension of the current web in which datais expressed in a common vocabulary making such that the data becomes machine processable.<br />Ontology– is a specification of concepts and relationships between them.<br />Triple- a ternary relation containing an entity pair and a relationship that expresses the link between them i.e. subject-predicate-object<br />Entity/Concept– an instance of a thing<br />URI– a unique identifier for any resource/entity/thing on the web<br />LOD- a semantic web initiative to provide a repository of semantically connected datasets<br />18<br />