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Visualization and Level-of-detail of Metadata for Interactive Exploration of Sensor Web

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Presentation by Byounghyun Yoo during the Sensor Web System and Visualization paper session of the Sensor Web Enablement workshop (held during the 2011 Cybera Summit).

Presentation by Byounghyun Yoo during the Sensor Web System and Visualization paper session of the Sensor Web Enablement workshop (held during the 2011 Cybera Summit).

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  • 1. Visualization and Level-of-detail of Metadata for Interactive Exploration of Sensor Web Byounghyun Yoo Center for Environmental Sensing and ModelingSingapore-MIT Alliance for Research and Technology
  • 2. Sensor webIllustration by Matt Heavner (2007) 2
  • 3. Sensor data exploration 3
  • 4. 2D map mashup 4
  • 5. Goal• Intuitive exposure of metadata for sensor resources Text-based Interactive query interface exploration • Dynamic 3D scene of sensor information 5
  • 6. Related work• Aditya 2007, Aim4GDI: Mapping and superimpositions of metadata summaries• Wood 2007, Interactive visual exploration of a large spatio-temporal dataset• Dörk 2008, VisGets: Coordinated visualization for Web-based information exploration• Sandvik 2008, Using KML for thematic mapping 6
  • 7. VisGets 7
  • 8. 3D thematic mapping
  • 9. Design goal• Enable casual formulation of geospatial semantic queries• Summarize information collections visually• Use integrated dynamic visualization• Optimize the amount of data transmission• Conform to open standards for interoperability 9
  • 10. Level-of-detail of metadata 10
  • 11. Dynamic 3D scene & implicit querySensor information Geospatial query ? Interactive 3D scene 11
  • 12. Architecture 12
  • 13. X3D Geospatial Component • All the benefits of X3D • Open royalty-free ISO-approved Web standards • Partnerships with OGC and W3C • Choice of implementations and tools • Scripting capabilities • Powerful browsers • Geospatial accuracy (WGS84, UTM, etc.) 13
  • 14. Use case• Search and exploration of sensor resources• PWS project • 34,700 personal weather stations• Local weather stations • 32 micro weather stations 14
  • 15. Metadata extraction<location>*<full>Sunnyside,*San*Francisco,*CA</full>*<neighborhood>Sunnyside</neighborhood>*<city>San*Francisco</city>*<state>CA</state>*<zip/>*<latitude>37.732376</latitude>*<longitude>B122.442902</longitude>*<elevation>364*ft</elevation></location><station_id>KCASANFR70</station_id><station_type>Vantage*Pro</station_type><observation_time>Last*Updated*on*July*23,*11:04*PM*PDT</observation_time><observation_time_rfc822>Sun,*24*Jul*2011*06:04:50*GMT</observation_time_rfc822><weather/><temperature_string>56.7*F*(13.7*C)</temperature_string><temp_f>56.7</temp_f><temp_c>13.7</temp_c><relative_humidity>94</relative_humidity><wind_string>Calm</wind_string><wind_dir>West</wind_dir><wind_degrees>269</wind_degrees><wind_mph>0.0</wind_mph> 15
  • 16. World border dataset ID Serial Unique ID FIPS String (2) FIPS 10-4 Country Code ISO2 String (2) ISO 3166-1 Alpha-2 Country Code ISO3 String (3) ISO 3166-1 Alpha-3 Country Code UN Short Integer (3) ISO 3166-1 Numeric-3 Country Code Name String (50) Name of country/area Area Long Integer (7) Land area, FAO Statistics (2002)POP2005 Double (10, 0) Population, World population Prospects Region Short Integer (3) Macro geographical (continental region)Subregion Short Integer (3) Geographical sub-region, UN statistics Lon Float (7, 3) Longitude Lat Float (7, 3) LatitudeGeometry Multi-Polygon Country/area border as polygon 16
  • 17. Visualization template 17
  • 18. Visualization template
  • 19. Visualization template
  • 20. Visualization template
  • 21. X3D/XML encoding<GeoLocation+geoCoords=".$latitude."+".$longitude."+0geoSystem=GDC><Transform+translation=0+".($scale/4)."+0><Shape><Cylinder+height=".($scale/2)."+radius=".$scale."/><Appearance><Material+diffuseColor=".$color."+emissiveColor=1+0+0transparency+=+0.4/></Appearance></Shape></Transform></GeoLocation> 21
  • 22. Conclusion• A visual exploration interface for metadata of sensor web• Dynamic geospatial query and 3D scene• Mashups with the X3D-based earth globeTwo-dimensional Three-dimensional space with text space with visual based search media navigation 22
  • 23. Future work★ Seamless dynamic exploration • Extend visual representation and query variations • X3D node specification • New framework: HTML5, CSS3 • Include X3D elements as part of 23
  • 24. Thank you
  • 25. Content• Introduction• Previous work• Design of metadata visualization• Progress• Future work 25
  • 26. Sensor resources• Discovery• Exploration• Sharing 26
  • 27. Digital earthDigital earth system should not be a singlevirtual globe, but multiple globes withinterconnected infrastructure.Each globe can be specially designed byproducers has a distinct set of needs. 27
  • 28. 3D Geo-browser• Google Earth • Pro: KML, easy to use, broad acceptance • Con: Limited functionality & API• Alternatives • Other geo-browsers 28
  • 29. Sensor data exploration 29
  • 30. Sensor data discovery• Ordinary text query• Tree-based hierarchical exploration 30
  • 31. Standard technologies 31
  • 32. X3D Earth globe• X3D standard v3.2• Full-coverage, full-detail X3D-Earth globe 32
  • 33. Metadata 33