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It doesn't matter it's grid or ugrid for TDS in terms of basic DAP data access. That has been said, a lot of functionalities of TDS, such as aggregation, assume the data structures in the netcdf file is in the regular grid. As for creating a 'ugrid' netcdf, it's out of the scope of TDS. The UGRID conventions tool Kyle got involved serves this purpose pretty well. You may want to take a look on existing 'ugrid' netcdf files and see if the structure could work out for your purpose. Guan -----Original Message----- From: thredds-bounces@xxxxxxxxxxxxxxxx [mailto:thredds-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Roy Mendelssohn Sent: Wednesday, April 16, 2014 1:46 PM To: Kyle Wilcox Cc: THREDDS community Subject: Re: [thredds] Irregular grids Hi Kyle: Is there existing code to write to ugrid? And is Ugrid and add-on to thredds or out of the box? Thanks, -Roy On Apr 16, 2014, at 9:55 AM, Kyle Wilcox <kyle@xxxxxxxxxxxxxxx> wrote: > As part of the SURA COMT project, we converted all unstructured output into the NetCDF UGRID format[1]. > > The WCS/WMS/NetcdfSubset services in THREDDS will not work on the UGRID datasets. DAP and ISO will work just fine. > > An option for WMS visualization is to use sci-wms[2]. > > Hope that helps. > > [1] https://github.com/ugrid-conventions/ugrid-conventions > [2] https://github.com/asascience-open/sci-wms > > > On Wed, Apr 16, 2014 at 12:30 PM, Joe Lee <hyoklee@xxxxxxxxxxxx> wrote: > Hi, Roy! > > Thanks for clarifying the real issue. I'm also interested in the "standard" way so that we can improve our hdf4_handler and h4tonccf tool. > > So, do you want to write your product in NetCDF UGRID that THREDDS can visualize as discussed in [3]? > > If so, based on [3], it seems that there's a standard way to write a NetCDF UGRID and visualize it [4]. > > [3] > https://groups.google.com/forum/#!topic/ugrid-interoperability/9kDNF0X > u43w [4] > http://comt.sura.org/thredds/godiva2/godiva2.html?server=http://comt.s > ura.org/thredds/wms/data/comt_1_archive/inundation_tropical/MDL_SLOSH/ > Hurricane_Ike_final_run_egm3 > > > -----Original Message----- > From: Roy Mendelssohn [mailto:roy.mendelssohn@xxxxxxxx] > Sent: Wednesday, April 16, 2014 11:03 AM > To: Joe Lee > Cc: THREDDS community; Kent Yang; Ted Habermann > Subject: Re: [thredds] Irregular grids > > I can write it to netcdf, but that doesn't mean that i have written it in some "standard" way, nor that thredds can read it (or thredds say with a ugrid extension). That is really my question. > > -Roy > > > On Apr 16, 2014, at 8:53 AM, Joe Lee <hyoklee@xxxxxxxxxxxx> wrote: > > > Hi, Roy! > > > > Have you tried h4tonccf [1] or OPeNDAP Hyrax hdf4_handler [2] on your product? > > > > May I download and look at your data product so that I can test with our tools as well? > > > > We'd like to help you if your HDF4 product cannot be converted to or served as NetCDF successfully. > > > > [1] http://www.hdfeos.org/software/h4cflib.php > > [2] http://www.hdfeos.org/software/hdf4_handler.php > > > > > > -----Original Message----- > > From: thredds-bounces@xxxxxxxxxxxxxxxx > > [mailto:thredds-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Roy > > Mendelssohn > > Sent: Wednesday, April 16, 2014 10:43 AM > > To: THREDDS community > > Subject: [thredds] Irregular grids > > > > Hi All: > > > > I am dealing with some L3 binned data, in what I will call the "Seawifs format". The data is stored in an HDF file as a VData - basically one long array or table if you want. The reason it is done this way is the "grid" is irregular, that is each row has a varying number of columns. I can read the data fine in python, but I am trying to find out what options I have for serving it. Clearly one option is to grid the data at a somewhat coarser resolution, and i might do that. But my questions are: > > > > 1. Is there a standard way to write this to a netcdf file (I can calculate the lat-lon at the center of each bin)? > > > > 2. Can such a file be served by thredds, and if so what would it take. > > > > 3. If it can be served by thredds, does what gets returned make sense to someone not familiar with what is going on (basically we deal with unsophisticated users, it must be real clear what is being returned to them). > > > > Thanks for any help. > > > > -Roy M. > > > > > > ********************** > > "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 > > 1352 Lighthouse Avenue > > Pacific Grove, CA 93950-2097 > > > > e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address) > > voice: (831)-648-9029 > > fax: (831)-648-8440 > > 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/ > > ********************** > "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 > 1352 Lighthouse Avenue > Pacific Grove, CA 93950-2097 > > e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address) > voice: (831)-648-9029 > fax: (831)-648-8440 > 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/ > ********************** "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 1352 Lighthouse Avenue Pacific Grove, CA 93950-2097 e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address) voice: (831)-648-9029 fax: (831)-648-8440 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/
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