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Re: [las_users] Re: Ferret: station data shows no variables



Andrea,

Writing a wrapper around GrADS to use that as a back end for LAS would be MUCH!!! more work than writing a driver for OPeNDAP sequences.  If it's not difficult for you to ingest your data into MySQL in the format described below, that would probably be the easiest solution.

http://ferret.pmel.noaa.gov/LASdoc/serve/cache/21.html


-- Jon


Andrea Fey wrote:
Thanks for the suggestion. I have considered this as an option, but have not yet looked into it in detail. Can anyone point to an example of, say, a GrADS-based LAS site? Right now I'm also exploring using a database-served data set instead of the GDS.
Andrea

Peter Cornillon wrote:

I'm not an LAS expert, but I think that the idea is that you can run  whatever processing engine under LAS. Normally, Ferret is used, but  this is not a requirement. This means that you could, for example,  Matlab which does handle sequences; i.e., this might be viewed as an  OPeNDAP sequence driver for LAS.

Peter

On Jun 27, 2005, at 12:58 PM, Andrea Fey wrote:

Thanks, Jon. I understood I'd need to write a driver for LAS but did  not realize it was a Ferret issue. I hoped using the data in Ferret  would give me a starting point for developing the driver.

Have any of you LAS users developed an OPeNDAP sequence driver?

Andrea

Jonathan S Callahan wrote:

Andrea,

OPeNDAP sequences are not currently supported in Ferret.  There is a  basic division in the OPeNDAP world between Sequence data  (potentially nested, indeterminate length arrays) and Grid data  (1D-4D constant length arrays). ...
You might consider posting again to the LAS Users list asking if  anyone else has written an OPeNDAP sequence driver for LAS.


-- Jon


Andrea Fey wrote:

I having trouble utilizing a station data set in Ferret. The dataset  I'd like to open is large:  http://nomads.ncdc.noaa.gov:9091/dods/IGRA_MONTHLY_RAOBS/igramon; a  single-station link is here:  http://nomads.ncdc.noaa.gov:9091/dods/IGRA_STATION_RAOBS/425/ igra.72208. I can open both of these, but when I "show data" there  is nothing listed.

I can open both of these in GrADS. My eventual goal is to add this  data to a LAS server, and when I run a script (addGDS.pl) against  either data set I get the following error message: DODS sequence not  supported at dds.y line 5.

Could this be a metadata issue even though the data can be pulled  into GrADS? Any other ideas?

Thanks.
Andrea



-- 
Andrea Fey
NOMADS Project Intern
Andrea.Fey@noaa.gov
828-271-4474


-- 
 Peter Cornillon
   Graduate School of Oceanography     -  Telephone: (401) 874-6283
      University of Rhode Island                 -               Fax:  (401) 874-6728
        Narragansett, RI 02882                    -           E-mail:  pcornillon@gso.uri.edu



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