WCS 1.1 does not yet support other than regular grids, though note there is now a change proposal in (OGC document 06-160) to get irregular grids (ISO 19123 CV_ReferenceableGrid in ISO-speak) into GML which should help. In my view it is crucial that conceptual models for grids remain unified between GML, WCS, and ISO 19123. > -----Original Message----- > From: address@hidden > [mailto:address@hidden On Behalf Of John Caron > Sent: 24 April 2007 16:45 > To: Pauline Mak > Cc: address@hidden > Subject: Re: Question about CDM > > > > Pauline Mak wrote: > > Hi all, > > > > Thanks for the help - through the second validator, I think > I've found > > out what's wrong with the dataset. Some of the axis > doesn't have any > > values under the regular column. I've written a little > Java app that > > goes through a directory and find all nc files and checks > that a) it > > opens up as a GriddedDataset and then 2) the > GridCoordSystem from the > > GriddedDataset isRegularSpatial(). Is this what it means > by the WCS > > standard that it has to be gridded and regularly spaced? > > yes. > I think WCS 1.1 relaxes the regular spacing need, which will > implement later this year (probably). > > > > > > Thanks, > > > > -Pauline. > > > > On 4/21/07, *Ethan Davis* <address@hidden > > <mailto:address@hidden>> wrote: > > > > Hi Pauline, > > > > Another resource for validating datasets against the CDM is > > available at > > > > http://motherlode.ucar.edu:8080/thredds/cdmValidate.html > > <http://motherlode.ucar.edu:8080/thredds/cdmValidate.html> > > > > And I believe it is distributed with all TDS > installations, so you could > > try it locally at > http://yourserver:port/thredds/cdmValidate.html > > > > Which datasets can be served by the TDS depends on the > service over > > which you want to make them available. The HTTP bulk > file download > > service (/thredds/fileServer/) can serve any file. The > OPeNDAP service > > (/thredds/dodsC/) can serve any dataset that the > netCDF-java library > > can > > read (the file types that can be read are listed on the > home page, > > http://www.unidata.ucar.edu/software/netcdf-java/). The > WCS service > > currently only handles gridded data. The key here is > that they have to > > be recognized as gridded datasets by the netCDF-java > library. The > > library can recognize gridded data and the coordinates > in the data using > > a few different conventions. As Tom and/or Roy > mentioned, CF is the > > convention we recommend. The CDM validator above should > give you more > > clues on how well you dataset validates. > > > > Hope that helps. > > > > Ethan > > > > Pauline Mak wrote: > > > Hi all, > > > > > > I'm currently setting up a THREDDS server to server our > > datasets. The > > > setup was fairly easy! However, I'm running into > problems with > > NetCDF > > > files which doesn't conform to the "Common Data > (Access) Model" - we > > > want to serve all of our data through WCS (which > comes for free with > > > THREDDS data server!). I've searched high and low > for documentation > > > on how to 'correct' incompatible files. but failed > to come up with > > > anything. Am I missing something? Should all NetCDF > files "just > > work" > > > with the NetCDF-Java 2.2 library? I'm aware that > files should be > > > gridded and regular. Am I understanding correctly > that gridded means > > > the files should have an x and y axis with optional > z and t? Is > > > there a nice method to find out if a file is > compatible and if it's > > > not compatible, why it is so? > > > > > > My understanding of NetCDF file is rather shallow... > so please bear > > > with me if I'm asking a simple question... > > > > > > Thanks & cheers, > > > > > > -Pauline. > > > > > > -- > > > Pauline Mak > > > Software Developer, Insight4 > > > Suite 2 / Level 1, 114 Murray St. > > > Hobart, Australia 7000 > > > p: (03) 6234 5203 > > > f: (03) 6234 5603 > > > address@hidden <mailto:address@hidden> > > <mailto:address@hidden <mailto:address@hidden>> > > > > -- > > Ethan R. Davis > Telephone: (303) 497-8155 > > Software Engineer Fax: > (303) 497-8690 > > UCAR Unidata Program Center > > E-mail: address@hidden <mailto:address@hidden> > > P.O. Box 3000 > > Boulder, CO 80307-3000 > > http://www.unidata.ucar.edu/ > > > > > ---------------------------------------------------------------------- > > ----- > > > > > > > > > > > > -- > > -- > > Pauline Mak > > Software Developer, Insight4 > > Suite 2 / Level 1, 114 Murray St. > > Hobart, Australia 7000 > > p: (03) 6234 5203 > > f: (03) 6234 5603 > > address@hidden <mailto:address@hidden> > > ============================================================== > ================= > To unsubscribe thredds, visit: > http://www.unidata.ucar.edu/mailing-list-delete-form.html > ============================================================== > ================= > > =============================================================================== To unsubscribe thredds, visit: http://www.unidata.ucar.edu/mailing-list-delete-form.html ===============================================================================
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