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Using Semantic Web to Optimize the Discovery, Access, and Utilization of Big Geospatial Data. Chaowei Phil Yang, Director NSF I/UCRC for Spatiotemporal Thinking, Computing, and Applications Kai Liu, Jizhe Xia, Zhipeng Gui, Zhenlong Li, and Chen Xu - PowerPoint PPT Presentation
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Virtual Semantic Web Workshop, May 7, 20131
Using Semantic Web to Optimize the Discovery, Access, and Utilization of Big
Geospatial Data
Using Semantic Web to Optimize the Discovery, Access, and Utilization of Big
Geospatial Data
Chaowei Phil Yang, DirectorNSF I/UCRC for Spatiotemporal Thinking, Computing, and Applications
Kai Liu, Jizhe Xia, Zhipeng Gui, Zhenlong Li, and Chen XuGeorge Mason University, Fairfax, VA, 22030-4444
Chaowei Phil Yang, DirectorNSF I/UCRC for Spatiotemporal Thinking, Computing, and Applications
Kai Liu, Jizhe Xia, Zhipeng Gui, Zhenlong Li, and Chen XuGeorge Mason University, Fairfax, VA, 22030-4444
Virtual Semantic Web Workshop, May 7, 2013
Big Data Challenge?
• Petabytes of data collected daily• Archive and management of Big Data• Processing Big Data• Discovery and access Big Data• Understanding Big Data
Virtual Semantic Web Workshop, May 7, 2013
Semantic Web for Big Data?
• Petabytes of data collected daily• Archive and management of Big Data• Processing Big Data• Discovery and access Big Data• Understanding Big Data
Virtual Semantic Web Workshop, May 7, 2013
Capture OnotologyCapture Onotology Rank ResultsRank Results Guided SearchGuided Search
Semantic-aided Data DiscoverySemantic-aided Data Discovery
Kai Liu et al., 2013, IJGIA
Virtual Semantic Web Workshop, May 7, 2013
Data Discovery DemoData Discovery Demohttp://geosearch.cloudapp.net/
Liu et al., 2012
Zhipeng Gui, Kai Liu et al., 2012, IJGIS
Virtual Semantic Web Workshop, May 7, 2013
Results Analyses Based on OntologyResults Analyses Based on Ontology
Demo using Pivot viewer: http://geosearch.cloudapp.net/ Zhipeng Gui et al., 2013, AGIS
Virtual Semantic Web Workshop, May 7, 2013
Planning: Polar Portal
Internet
Crawler
Data
Manual Register
Data Validator
Spatiotemporal DatabaseSpatiotemporal
Index Full Text Index
Semantic Reasoner
Ontology Repo
Crawler and Register
ComponentData
Management Component
Discovery Component
Data Discovery
Broker
Quality Database
Monitor
Evaluator
Quality Monitoring Component
Web-based GUI
End users
C. Yang, W. Li, K. Liu, Z. Li, Z. Gui, C. Xu
Virtual Semantic Web Workshop, May 7, 2013
A Framework for Managing Big Geospatial Data
Yang C., Bambacus M., Benedict K., Nebert D., Mochuney D., Hazlett S., Houser P., Raskin R., Xu Y., Fay D., Rezgui A., Huang Q., and Xu C., 2011. Using Metadata, Data/Service Quality and Knowledge to Facilitate Better Data Discovery, Access, and Utilization for Supporting EarthCube, http://semanticommunity.info/@api/deki/files/13812/=024_Yang.pdf.
Virtual Semantic Web Workshop, May 7, 2013
Semantic Web Related Research Needs
1) Better capturing the vocabularies and the linkages• Domain/community specific• Weights assignments• Dynamic
2) Better tools for • Knowledge capturing• Knowledge reasoning • Interactive GUI
3) More study in social sciences is urgently needed to enable efficient collaboration among team members, communities, and domains
4) Thinking and computing in a spatiotemporal fashion will provide an enabling capability for the new geoscience frontier by contributing essential computing architectures, algorithms, and methodologies