The USGS java-based Digital Earth Explorer is up at
http://dss1.er.usgs.gov. You need a fast internet pipe and a 4.51
Netscape or 4.01 IE to check it out, but it's a pretty spiffy
job. It's not MapXtreme and Oracle8i, but I think it's worth a
look for anyone building a java map server in a distributed data
environment. (gives you something to drool over).

One of the creators, Marc Levine, explained to me the technology
used to build it:

"The Digital Earth Explorer is based on several COTS products.
ESRI's SDE, MR. SID, INFORMIX, FME, and home grown Java
development. The data is current managed in a semi distributed
manner.  The spatial data sets (with the exception of SDE data
sets) reside on a mid server in Reston, VA.  This semi
distributed model will change within the next year and nodes will
feed this portal.  The data bases or attribution is fully
distributed. The current hardware configuration is a sun 5000 as
the mid server. However, this makes little difference in the
fully distributed model.  A node could be any platform  with any
backend.  We would generate a configuration file that would act
as schema template for the Java map server.

This application is patent pending, but we will be looking for
partners, collaborators, etc... in the
next year or so."

Partners? Collaborators, anyone?

- Bill Thoen


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