HR: 08:30h
AN: IN31C-03    [Abstracts]
TI: Serving Satellite Remote Sensing Data to User Community through the OGC Interoperability Protocols
AU: * Di, L
EM: ldi@gmu.edu
AF: Laboratory for Advanced Information Technology and Standards, George Mason University, 6301 Ivy Lane, Suite 620 , Greenbelt, MD 20770
AU: Yang, W
EM: wyang1@gmu.edu
AF: Laboratory for Advanced Information Technology and Standards, George Mason University, 6301 Ivy Lane, Suite 620 , Greenbelt, MD 20770
AU: Bai, Y
EM: ybai1@gmu.edu
AF: Laboratory for Advanced Information Technology and Standards, George Mason University, 6301 Ivy Lane, Suite 620 , Greenbelt, MD 20770
AB: Remote sensing is one of the major methods for collecting geospatial data. Hugh amount of remote sensing data has been collected by space agencies and private companies around the world. For example, NASA­_s Earth Observing System (EOS) is generating more than 3 Tb of remote sensing data per day. The data collected by EOS are processed, distributed, archived, and managed by the EOS Data and Information System (EOSDIS). Currently, EOSDIS is managing several petabytes of data. All of those data are not only valuable for global change research, but also useful for local and regional application and decision makings. How to make the data easily accessible to and usable by the user community is one of key issues for realizing the full potential of these valuable datasets. In the past several years, the Open Geospatial Consortium (OGC) has developed several interoperability protocols aiming at making geospatial data easily accessible to and usable by the user community through Internet. The protocols particularly relevant to the discovery, access, and integration of multi-source satellite remote sensing data are the Catalog Service for Web (CS/W) and Web Coverage Services (WCS) Specifications. The OGC CS/W specifies the interfaces, HTTP protocol bindings, and a framework for defining application profiles required to publish and access digital catalogues of metadata for geographic data, services, and related resource information. The OGC WCS specification defines the interfaces between web-based clients and servers for accessing on-line multi-dimensional, multi-temporal geospatial coverage in an interoperable way. Based on definitions by OGC and ISO 19123, coverage data include all remote sensing images as well as gridded model outputs. The Laboratory for Advanced Information Technology and Standards (LAITS), George Mason University, has been working on developing and implementing OGC specifications for better serving NASA Earth science data to the user community for many years. We have developed the NWGISS software package that implements multiple OGC specifications, including OGC WMS, WCS, CS/W, and WFS. As a part of NASA REASON GeoBrain project, the NWGISS WCS and CS/W servers have been extended to provide operational access to NASA EOS data at data pools through OGC protocols and to make both services chainable in the web-service chaining. The extensions in the WCS server include the implementation of WCS 1.0.0 and WCS 1.0.2, and the development of WSDL description of the WCS services. In order to find the on-line EOS data resources, the CS/W server is extended at the backend to search metadata in NASA ECHO. This presentation reports those extensions and discuss lessons-learned on the implementation. It also discusses the advantage, disadvantages, and future improvement of OGC specifications, particularly the WCS.
UR: http://geobrain.laits.gmu.edu
DE: 0525 Data management
DE: 0530 Data presentation and visualization
DE: 1640 Remote sensing (1855)
SC: Earth and Space Science Informatics [IN]
MN: Fall Meeting 2005