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

Planning: Data Center DataDiscvoery

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

Virtual Semantic Web Workshop, May 7, 2013

Sponsors and Collaborators