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Hello all, We have submittted the progerss report from our group to the GALEON wiki. The somewhat bulky summary is reproduced below. http://capita.wustl.edu/capita/researchareas/GALEON/Reports/060206/060206_GALEON_IE_DataFed.htm DataFed - GALEON IE Summary This second progress report contains the findings on interoperability between the GALEON WCS test servers and the DataFed <http://datafed.net/> WCS client and the development of a DataFed WCS server. The first DataFed report<http://capita.wustl.edu/capita/researchareas/GALEON/051128_GALEON_IE_Rept.htm> on the GALEON wiki (Dec 5, 2005) contained the early IE results. The DataFed <http://datafed.net/> WCS client can successfully access the WCS data sets from the U. Florence <http://athena.pin.unifi.it:8080/galeon/WCS-v1.0?REQUEST=GetCapabilities&VERSION=1.0.0&SERVICE=WCS> and from the UNIDATA THREDDS WCS test servers. The spatial queries to both servers yield the expected return as spatial grids. Within DataFed, the received WCS (NetCDF) data from both servers, are easily transformed into data views and used in distributed web applications by chaining appropriate web services. As an experiment, we have created a WCS test server to serve a wide variety of point, grid an image coverage data. Our goal was to evaluate the WCS protocol for accessing coverages of different types arising from a variety Earth observation and modeling systems. We are most encouraged by the possibilities but recognize that considerable work is to be done on the extending the describeCoverage schema to accommodate these coverage types and to augment the returned data types (e.g. a Table) to accommodate these additional coverage types. The discussion on the possible WCS extensions is given in a separate report to the GALEON IE group. Due to the late completion of the DataFed WCS server, it has not been tested for interoperability by remote clients. Substantial hurdles are still ahead before we reach a 'snap'-like WCS client-server interoperability including: - the temporal aspects of the WCS queries needs more work both on server and client side - automatic (loosely coupled) registration of WCS services needs work (using ncML-GML ?) - geo-re-projection services (preferably web services) to handle the homogenization of the mired projection used by the different data providers. We recognize that many of the current inadequacies are being addressed in other interoperability efforts and possibly by the continuation of this IE. We are looking forward enhancing our interaction with the group as well as individuals in this group while striving toward better interoperability of our data systems. -- Professor of Mechanical Engineering, Director CAPITA, Washington University St. Louis, MO 63130 1 Brookings Drive, Box 1124 314 935 6099
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