Journal
INTERNATIONAL JOURNAL OF DIGITAL EARTH
Volume 8, Issue 6, Pages 451-475Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17538947.2014.929750
Keywords
CyberGIS/WebGIS; spatial cloud computing; GEO; spatiotemporal thinking and computing; national geographic state; GeoPortal
Categories
Funding
- NSF [PLR-1349259, IIP-1338925]
- FGDC [G13PG00091]
- NASA [NNG12PP37I]
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [1338925] Funding Source: National Science Foundation
- Directorate For Geosciences
- ICER [1540998, 1541039] Funding Source: National Science Foundation
- ICER
- Directorate For Geosciences [1541049] Funding Source: National Science Foundation
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A spatial web portal (SWP) provides a web-based gateway to discover, access, manage, and integrate worldwide geospatial resources through the Internet and has the access characteristics of regional to global interest and spiking. Although various technologies have been adopted to improve SWP performance, enabling high-speed resource access for global users to better support Digital Earth remains challenging because of the computing and communication intensities in the SWP operation and the dynamic distribution of end users. This paper proposes a cloud-enabled framework for high-speed SWP access by leveraging elastic resource pooling, dynamic workload balancing, and global deployment. Experimental results demonstrate that the new SWP framework outperforms the traditional computing infrastructure and better supports users of a global system such as Digital Earth. Reported methodologies and framework can be adopted to support operational geospatial systems, such as monitoring national geographic state and spanning across regional and global geographic extent.
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