1.  Copyright 2008 Digital Enterprise Research Institute. All rights reserved. Digital Enterprise Research Institute www.deri.ie Live Linked Open Sensor Database Danh Le-Phuoc, Josiane Xavier Parreira, Michael Hausenblas, Yuanbo Han, Manfred Hauswirth DERI, NUI Galway, Ireland

2. Digital Enterprise Research Institute www.deri.ie Queries to physical world Live queries  Give me the traffic status and camera image 5 nearest junctions  Notify me in the morning if the snow on the way to work is too deep to drive Semantically discover observations of physical world  “city planner may want to assess and monitor quality of life in certain area ⇛ his own domain of knowledge, then finds out that quality of life can be measured from noise, sunlight, humidity, air pollution, traffic condition, etc ⇛ find sensor sources can provide such data in his area of interest” 2 of XYZ

3. Digital Enterprise Research Institute www.deri.ie Millions of sensor data sources US National Weather Service : Surface weather, climate monitoring, Upper Air, Satellite, Radar, River level, Sea level, Snow fall/depth, etc Commercial Weather Web services : Yahoo Weather, Weather Underground, Weather Bug, etc Yahoo traffic Cameras : Webcams, CCTVs, Traffic cameras, etc Personal Weather stations ⇛ Open and Live access 3 of XYZ

4. Digital Enterprise Research Institute www.deri.ie Issues of accessibility and integration Data in several formats : XML, JSON, HTML, RSS, structural text, etc Lack of common data model and query language/interface Lack of metadata and semantics Lack of entry point for sensor data source discovery 4 of XYZ

5. Digital Enterprise Research Institute www.deri.ie Live Linked Sensor Database Provides single entry point as a portal for exploring sensor data sources in unique data format Publishes sensors as linked data sources with rich semantics Contains enriched metadata and live sensor data Collects data from 200.000 sensors and more 5 of XYZ

6. Digital Enterprise Research Institute www.deri.ie Links physical observations to Web of Data 6 of XYZ Live Linked Open Sensor Database Geo-names Semantic Sensor Network ontology http://purl.oclc.org/NET/ssnx/ssn DOLCE SWEET ontology DBpedia

7. Digital Enterprise Research Institute www.deri.ie Architecture 7 of XYZ Data transforming and annotatingSensor stream wrapper Data stream management system D2R Raw sensor data streamSensor description Relational Database Sensor Map

8. Digital Enterprise Research Institute www.deri.ie Sensor Map 8 of XYZ

9. Digital Enterprise Research Institute www.deri.ie SPARQL Endpoint 9 of XYZ

10. Digital Enterprise Research Institute www.deri.ie Next steps Add more sensor data sources Link to LinkeGeoData, Eurostats, US Census,Data- Gov,etc. Modify D2RQ to support spatial query Improve performance for querying live and archived sensor data Add dynamic web sources, e.g., blog posts, news feeds, social network applications (Facebook, Twitter, etc.) and search engine updates as virtual sensor data sources 10 of XYZ

11. Digital Enterprise Research Institute www.deri.ie Summary Live Linked Open Sensor Database provides:  Linked data of 200.000 sensors (metadata and live/ archived data )  SensorMap: geo-based facet browser for exploring the data (http://sensormasher.deri.org/Sensors/map/sensor.zul )http://sensormasher.deri.org/Sensors/map/sensor.zul  SPARQL endpoint powered by D2R http://sensormasher.deri.org/d2r-server/ http://sensormasher.deri.org/d2r-server/  Mashup Composer powered by DERI Pipes 11 of XYZ

12. Digital Enterprise Research Institute www.deri.ie Sensor composer 12 of XYZ