On 04/01/2011 10:13 AM, Ivan PRICE wrote:
Hi again,
I'm sorry to ask so many questions, i am looking around before asking
these..
My next problem is that I'd like to define a 'virtual variable' that
is the result of simple operations on existing variables, for example
a new variable that is the sum of 2 existing ones.
I have read all about aggregating between datasets and over dimensions
such as time, but i think this is different. My goal is to have a
virtual WMS layer that is the result of the relationship between
existing variables.
Does this sort of functionality exist at this stage, or should i be
pre-processing the dataset before the thredds stage ?
This functionality is available with the Ferret-THREDDS Data Server.
It's a little tricky to install as a stand-alone service, but it can be
done and you can use it to define complex virtual variables based on the
existing variables.
Info:
http://ferret.pmel.noaa.gov/LAS/documentation/the-ferret-thredds-data-server-f-tds
Me droning on about it:
http://ams.confex.com/ams/89annual/techprogram/paper_146288.htm (link to
the talk is at the bottom).
Roland
cheers and have great weekends
-i
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