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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
The NetCDF Subset Service (part of THREDDS) allows filtering based on time and space parameters, but not arbitrary functions. Here is an example: http://thredds-test.unidata.ucar.edu/thredds/ncss/pointData/cf_doc_dsg/example/H.2.1.1.nc/dataset.html Cheers, Christian Ward-Garrison On Thu, Sep 11, 2014 at 12:48 PM, Benno Blumenthal <benno@xxxxxxxxxxxxxxxx> wrote: > Despite all the good reasons that Roy provided not to do it, we provide > server-side services. > > You could look at > > > http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCEP/.EMC/.CMB/.GODAS/.monthly/.surface/.SSHG/ > > as a sample sea surface height dataset -- many of our functions are > documented at > > http://iridl.ldeo.columbia.edu/dochelp/Documentation/funcindex.html > > and it includes a number of time-aware operators as well as spatial > selection. Perhaps off-line we can work out an example that might be of > interest. > > On Thu, Sep 11, 2014 at 2:39 PM, Dallas Masters < > Dallas.Masters@xxxxxxxxxxxx> wrote: > >> Thanks. I wasn't going to advertise this service on our ERDDAP server. It >> was going to be used to fulfill backdoor requests generated by our own web >> pages (albeit possible for someone to view the source and see how to make >> the request). >> >> -- >> Dallas Masters >> Sea Level Research Group >> University of Colorado >> >> >> On Thu, Sep 11, 2014 at 12:22 PM, Roy Mendelssohn < >> roy.mendelssohn@xxxxxxxx> wrote: >> >>> ERDDAP can serve the time series. At the moment it does not have the >>> type of server-side function you are describing. I believe GDS and F-TDS >>> have such capabilities. >>> >>> We have been holding back on doing this in ERDDAP for some simple >>> reasons: >>> >>> 1. There is no agreed upon syntax for such requests. >>> >>> 2. It could open up your server to quite large amounts of data >>> processing >>> >>> 3. The processing requests could take long enough that it would require >>> an asynchronous response. >>> >>> All of these things imply not insignificant changes in the service. >>> >>> -Roy >>> >>> On Sep 11, 2014, at 10:50 AM, Dallas Masters <Dallas.Masters@xxxxxxxxxxxx> >>> wrote: >>> >>> > Here's what I'm trying to do, but I'm unsure of the simplest method: >>> > >>> > I have a netCDF file of gridded sea surface heights over time. I'd >>> like Ramadda (or ERDDAP or THREDDS) to serve time series from that file at >>> specific lat,lon requests. But I'd like to apply some filters to the time >>> series before sending on as JSON data to the client. Is there a method to >>> apply intermediate processing or internal server functions to data prior to >>> sending the data, perhaps specifying the function call in the URL? I guess >>> this is like server-side processing in GRADS or F-TDS? I've seen some >>> discussions about doing NCO ncwa or perhaps applying IDV functions to data >>> in Ramadda, but I'm not sure if this is documented and how to implement >>> something similar. Any advice is appreciated. >>> > _______________________________________________ >>> > thredds mailing list >>> > thredds@xxxxxxxxxxxxxxxx >>> > For list information or to unsubscribe, visit: >>> http://www.unidata.ucar.edu/mailing_lists/ >>> >>> ********************** >>> "The contents of this message do not reflect any position of the U.S. >>> Government or NOAA." >>> ********************** >>> Roy Mendelssohn >>> Supervisory Operations Research Analyst >>> NOAA/NMFS >>> Environmental Research Division >>> Southwest Fisheries Science Center >>> ***Note new address and phone*** >>> 110 Shaffer Road >>> Santa Cruz, CA 95060 >>> Phone: (831)-420-3666 >>> Fax: (831) 420-3980 >>> e-mail: Roy.Mendelssohn@xxxxxxxx www: http://www.pfeg.noaa.gov/ >>> >>> "Old age and treachery will overcome youth and skill." >>> "From those who have been given much, much will be expected" >>> "the arc of the moral universe is long, but it bends toward justice" >>> -MLK Jr. >>> >>> >> >> _______________________________________________ >> thredds mailing list >> thredds@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> > > > > -- > Dr. M. Benno Blumenthal benno@xxxxxxxxxxxxxxxx > International Research Institute for climate and society > The Earth Institute at Columbia University > Lamont Campus, Palisades NY 10964-8000 (845) 680-4450 > > _______________________________________________ > thredds mailing list > thredds@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ >
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