UGRID support is out-of-the-box in THREDDS, nothing UGRID specific is need
for the DAP/ISO endpoints.
This seems promising for writing UGRID files:
https://github.com/pyugrid/pyugrid/blob/master/pyugrid/ugrid.py#L97
Once you have a UGrid object with node coordinates, you can use the
"set_node_data" and "save_as_netcdf" functions available on the object.
On Wed, Apr 16, 2014 at 1:45 PM, Roy Mendelssohn
<roy.mendelssohn@xxxxxxxx>wrote:
> 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/9kDNF0Xu43w
> > [4]
> http://comt.sura.org/thredds/godiva2/godiva2.html?server=http://comt.sura.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.
>
>
