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Re: Netcdf-Java guidance needed

Hi, John.

Thanks very much for your pointers. I'm embarrassed that I did not see the netcdf/examples/programs link. I think I was suffering considerable information overload trying to figure out how to easily access the contents of the MADIS files I started with. The Java examples look very nice and clean. I wish I'd pursued that approach sooner. In any case, earlier last week Jeff (address@hidden ) steered me over to http://www.met.utah.edu where I found I could download the variables that I needed for a single station by the month. So, I'd begun that approach before I heard back from you and it's seemed to work out OK. If I need to go back for more data, I may try the Java approach.

So, thank you all, Dave, Jeff, and John.

Best wishes,


On Apr 10, 2009, at 11:11 AM, John Caron wrote:

Hi David:


has some complete programs that should be helpful.

David Leserman wrote:
Hi, John.

Browsing the http://www.unidata.ucar.edu/software/netcdf-java/, I see
that you've written a lot of the documentation and that you're the
THREDDS, NetCDF-Java expert at Unidata, so I pose my query to you.

I find extensive documentation for the details of NetCDF-Java on the web
site. What I can't find is any example of a complete Java program that
would be used to access some data. I believe that with one or two
examples, I could complete my task (described below). Can you direct me
to such an example? If you're not the person to ask, can you suggest
someone else?

I'm an individual attempting to use MADIS datasets to glean a few
parameter values for a single station, KBJC, for every hour for 3+
years. I'm looking for the METAR values for SKYCVLB (sky cover layer
base), DD (wind direction), FF (wind speed), FFGUST (wind gust), VIS
(visibility), PCP1H (accumulated precip - 1h), and PCPRATE
(precipitation rate).

we dont yet have the MADIS data being served through a THREDDS Data Server. We are working on that and will keep you informed. You might look at our experimental METAR server at


this service will be up and down, but any feedback would be appreciated.

good luck!

I use a Mac, I did some Java programming 10 years ago, and I did some
consulting for Dave Fulker at Unidata about 15 years ago, so Netcdf- Java
is an approach that appeals to me. I've already downloaded 0.25 TB of
MADIS files from pftp.madis-fsl.org. (It would have been better to glean
the little bit of data I needed via a server, but I was ignorant, and
now I have the data here, so I might as well use it.)

Thanks very much for whatever guidance and or pointers you can provide.

Best regards,

David Leserman

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