Fan, I was out of town for a few days, but I'll get my head into your issue again today and let you know what I find. -Lansing > Hello Lansing, > > Any comments/findings about my questions? > > With or without featureCollection we need to serve grib data in their granule > form, so how to make grib table work for individual granules is remaining > question number one. So far our grib table works with aggregated > featureCollection dataset, but not for granules under 'files' folder. I also > tried the 'iospParam' attribute of the 'netcdf' element outside > featureCollection, like > > <datasetScan name="GLDAS_CLM10SUBP_3H" ID="GLDAS_CLM10SUBP_3H" > path="GLDAS_CLM10SUBP_3H" location="/ftp/data/s4pa_TS2/GLDAS_CLM10SUBP_3H/"> > <netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2" > iospParam="gribParameterTable=/home/ffang/gribtab_clm.tab"> > </netcdf> > ... > > and TDS didn't seem to read the grib table. > > The other main question is about the collection .ncx file usage. I found > accessing that file very speedy in TDS and wonder if it should be used to > serve our extremely long time series datasets (~30 years of hourly data), > i.e. shall we let TDS make the file at the data location instead of under > cache/cdm, and treat it as the timeseries dataset? > > -Fan > > ________________________________________ > From: Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC] > Sent: Friday, May 17, 2013 2:50 PM > To: Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC]; address@hidden > Cc: address@hidden > Subject: RE: [THREDDS #GJF-200148]: TDS 4.3 GRIB names different from TDS 4.2 > > I take it back - the .tab extension apparently works. We previously made an > error renaming the grib table. > > I also changed '/s' to '.s' but both came out the same. For example, > kg/m^2/s or kg/m^2.s would show up as kgm^2s, which is wrong. I suppose we > have to change it to kgm^-2s^-1 in the table? I hope it is consistent with > software like 'wgrib'. > > It seems the variable names are essentially the long names and units in grib > table plus something like '_surface', with space chars replaced by > underscores. I guess we can survive with that. > > These show up in the collection 'Best Timeseries' (is there a way to > re-configure this collection name?), but not for individual files under > 'files' folder in TDS (again, is there a way to configure for the folder > name?). Is this expected? > > One final question: if I drop the collection index file .ncx at the data > location, TDS seems to be able to serve it like a dataset, and for time > series it is surprisingly fast to serve the .ncx file instead. Is this > intended - in other words we shall direct user to use .ncx, especially for > long time series? I know in default it's under cache/cdm and not exposed to > users. What's the catch here? > > Thanks. > > -Fan > ________________________________________ > From: Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC] > Sent: Thursday, May 16, 2013 6:13 PM > To: address@hidden for > Cc: address@hidden > Subject: RE: [THREDDS #GJF-200148]: TDS 4.3 GRIB names different from TDS 4.2 > > I can confirm changing the grib table name to have .tab as extension still > does not work. > > I'll try the modifications in the units, but wonder why it fails for all > since some of them have legit units, like 'K' for temperature. > > -Fan > ________________________________________ > From: Unidata THREDDS Support address@hidden > Sent: Thursday, May 16, 2013 2:37 PM > To: Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC] > Cc: address@hidden; Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC]; address@hidden > Subject: [THREDDS #GJF-200148]: TDS 4.3 GRIB names different from TDS 4.2 > > Fan, > > I did a little more digging, and I don't think the file name extension will > matter - that was my misinterpretation of how the table was getting picked > up. However, you will probably have the best result directly embedding the > table information in your featureCollection element using the xml notation. > It looks like you tried this already, so I am not sure why it did not work > for you. It is possible that it broke because you did not follow udunits > standard -- for instance, square meters is notated as m^2, rather than > m(superscript)2. The code you are asking about is just the number that > identifies the grib parameter. > > Inside your <featureCollection> element: > > <gribConfig> > <parameterMap> > <parameter code="2"> <<-- This will override the standard table values for > parameter 2 (code < 128 are standard, > 128 are local) > <description>Pressure reduced to MSL</description> > <units>Pa</units> > <name>PRMSL</name> > </parameter> > <parameter code="131"> > <description>Snowfall rate</description> > <units>kg/m^2.s</units> <<--Compound units are notated with a dot, so /m^2/s > is just /m^2.s > <name>Snof</name> > </parameter> > ... > > </parameterMap> > > </gribConfig> > -Lansing Madry > Unidata > Boulder, Colorado > > Ticket Details > =================== > Ticket ID: GJF-200148 > Department: Support THREDDS > Priority: Low > Status: Closed > > -Lansing Madry Unidata Boulder, Colorado Ticket Details =================== Ticket ID: GJF-200148 Department: Support THREDDS Priority: Low Status: Open
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