---------- Forwarded Message ---------- Date: Monday, December 17, 2001 11:22 AM -0500 From: Jeff de La Beaujardiere <address@hidden> To: Ben Domenico <address@hidden> Subject: Re: Digital Earth and XML
You asked about recent developments in the "Digital Earth" arena.
Digital Earth as a loosely-coordinated international effort is continuing. I believe the next international symposium will be in 2003. The events formerly known as Digital Earth Community Meetings will now occur under the auspices of the GeoData Alliance <http://www.geoall.net/>. There is a transition message on the old DE website at <http://www.digitalearth.gov/>.
The US Government is focusing specifically on interoperability and framework data activities. The interagency Federal Geographic Data Committee (FGDC) has established a new working group for Geospatial Applications and Interoperability (GAI) chaired by NASA <http://gai.fgdc.gov/>. Secondly, as part of the US Office of Management and Budget (OMB) e-Government initiative, FGDC is coordinating work on the "Geospatial One-Stop" portal to a distributed collection of framework data implemented using interoperability standards <http://www.fgdc.gov/whatsnew/whatsnew.html#onestop>.
Work on standards themselves is progressing in such arenas as the OpenGIS Consortium (OGC) Web Services Testbed. The Web Map Service (WMS) specification which I edit has just been updated to version 1.1.1. The Web Feature Service (WFS) 1.0.0 has also been approved. Both will appear soon at <http://www.opengis.org/techno/implementation.htm>. Geography Markup Language (GML) was released last February. WMS is being taken up by ISO TC211 as ISO 19128 <http://www.isotc211.org/pow.htm>.
Regarding the use of XML, I can say that the OGC Web Services specifications make extensive use of XML. GML is written in XML, and the services themselves are described in XML. Future versions of this metadata will use Web Services Description Language (WSDL) <http://www.w3.org/TR/wsdl>. We are also considering optional Simple Object Access Protocol (SOAP) <http://www.w3.org/2000/xp/> request message encodings as an adjunct to the existing HTTP GET requests.
Happy holidays, Jeff DLB
Dr Jeff de La Beaujardiere * Computer Scientist NASA Goddard Space Flight Center * Code 933 address@hidden * +1 301 286 1569 http://iniki.gsfc.nasa.gov/
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