Spatial Data Access Tool: Yaxing Wei, Suresh-Kumar Santhana- Vannan, Robert B. Cook, Bruce E. Wilson, and Tammy W. Beaty [email protected]Oak Ridge National Laboratory December 14 th 2009 Enable visualization and access of geospatial data using OGC services and Google Earth
Spatial Data Access Tool:. Enable visualization and access of geospatial data using OGC services and Google Earth. Yaxing Wei, Suresh-Kumar Santhana-Vannan, Robert B. Cook, Bruce E. Wilson, and Tammy W. Beaty [email protected] Oak Ridge National Laboratory. December 14 th 2009. ORNL DAAC. - PowerPoint PPT Presentation
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Spatial Data Access Tool:
Yaxing Wei, Suresh-Kumar Santhana-Vannan, Robert B. Cook, Bruce E. Wilson, and Tammy W. Beaty [email protected]
Oak Ridge National Laboratory
December 14th 2009
Enable visualization and access of geospatial data using OGC services and Google Earth
2
ORNL DAAC
• Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC)– NASA-sponsored source for biogeochemical and
ecological data and models useful in environmental research
• Data in ORNL DAAC– field campaign, land validation, regional and
global data– over 800 data sets, ~220,000 files, ~1.1TB size– various formats
3
MAST-DC
• The Modeling and Synthesis Thematic Data Center (MAST-DC)– provide data management support for North
American Carbon Program (NACP) project– provide data to users in the formats, resolutions,
and projections based on their requirements• Data in MAST-DC
– model inputs, model outputs, observations (forest/crop, tower flux), and other related data
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Challenges faced by data centers
• Rapidly increasing archiving rate• Heterogeneity of geospatial data• Rapidly growing user community and user
requirements• Heterogeneity of data delivering mechanism
– Diverse ways in which data centers publish and deliver geospatial data introduce extra burden to users to access data from multiple data centers
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New solutions needed!
• Data users need to:– Find and visualize data efficiently– Access diverse data in ready-for-use formats– Access diverse data in a standard way
• ORNL DAAC and MAST-DC have tapped into the benefits offered by Open Geospatial Consortium (OGC) standards, Web-enabled GIS tools, and Virtual Globe technology.
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OGC and its Standards
• Open Geospatial Consortium (OGC)– non-profit, international, voluntary consensus standards
organization that is leading the development of standards for geospatial and location based services.
• OGC Web Coverage Service (WCS)– Web service for actual geospatial coverage data access
• OGC Web Map Service (WMS)– Web service for geospatial data (coverage or feature)
visualization• Goal: interoperability
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The ORNL WCS and WMS Servers
• MapServer-based• WCS
– http://webmap.ornl.gov/ogcbroker/wcs?– Version 1.0.0– Customized geospatial coverage access