[gradsusr] Problem accessing NCEP (NOMADS) GrADS-DODS server (from a web server)

Wed Sep 14 09:10:22 EDT 2011

Joe,

I realize this is 12 hours later, but I just now successfully opened the
same dataset.  Here's the command output:

Grid Analysis and Display System (GrADS) Version 2.0.a7.oga.3
Copyright (c) 1988-2008 by Brian Doty and the
Institute for Global Environment and Society (IGES)
GrADS comes with ABSOLUTELY NO WARRANTY
See file COPYRIGHT for more information

Config: v2.0.a7.oga.3 little-endian readline printim grib2 netcdf hdf4-sds
hdf5
opendap-grids,stn athena geotiff
Issue 'q config' command for more information.
Loading User Defined Extensions table </bin/gex/udxt> ... ok.
GX Package Initialization: Size = 11 8.5
<ncep.noaa.gov:9090/dods/rtma2p5/rtma2p520110913/rtma2p5_anl_23z
Scanning self-describing file:
http://nomads.ncep.noaa.gov:9090/dods/rtma2p5/rt
ma2p520110913/rtma2p5_anl_23z
SDF file
http://nomads.ncep.noaa.gov:9090/dods/rtma2p5/rtma2p520110913/rtma2p5_a
nl_23z is open as file 1
LON set to -130.103 -60.9033
LAT set to 20.192 52.7926
LEV set to 0 0
Time values set: 2011:9:13:23 2011:9:13:23
E set to 1 1
____________________

As you can see above, I'm using a slightly earlier opengrads version.  I
plotted one of the variables--no problem.  However, when I tried to open a
file that I know would not exist (e.g., today's 23Z data), I got a response
somewhat similar to yours.

Stephen McMillan

On Tue, Sep 13, 2011 at 9:20 PM, Joe Moore <joe at wxjoe.com> wrote:

> All,
>
> I'm having a problem using the GrADS Data Server (GrADS-DODS) from NCEP
> (NOMADS). I am using the sdfopen command to access the dataset (RTMA 2.5km).
> When I run the script locally on my Ubuntu machine, everything works great!
> However, when I transfered the script to my web host I get an error.
>
> Here's the line from my script:
> 'sdfopen
> http://nomads.ncep.noaa.gov:9090/dods/rtma2p5/rtma2p5'dapdate'/rtma2p5_anl_'currhr'z
> '
> (where dapdate=YYYYMMDD and currhr=HH - yes, I've double checked to make
> sure the data exists.)
>
> Here's the output:
> ...
> Running in Batch mode
> No hardcopy metafile open
> All files closed; all defined objects released;
> All GrADS attributes have been reinitialized
> Error: nc_open failed to open file
> http://nomads.ncep.noaa.gov:9090/dods/rtma2p5/rtma2p520110913/rtma2p5_anl_23z
> NetCDF: I/O failure
> gadsdf: Couldn't ingest SDF metadata.
> ...
>
> I've tried searching the web and this (excellent) mailing list assistance
> but I can't seem to figure out what's going wrong. I suspect it may have
> something to do with my web host. (I use Bluehost- I know they're a somewhat
> subpar host, but I'm just a student experimenting with different things!)
>
> Here's what uname -a gives on my web server:
> Linux box566.bluehost.com 2.6.32-46.1.BHsmp #1 SMP Tue Sep 6 12:18:02 MDT
> 2011 x86_64 x86_64 x86_64 GNU/Linux
>
> If there's other tests I can run to probe the issue, let me know. Also, is
> this the best way to use the GrADS-DODS server? Should I just download the
> grib2 locally instead?
>
> I was planning to download the grib2 locally, but when I discovered the
> GrADS-DODS server I found out that this might not be necessary. I plan to
> run this script hourly, so please advise as to which method would be best.
>
> Thanks a lot!
>
> -Joe Moore
>
> The script in question:
> http://pastebin.com/MDQ9vk3y
>
> My GrADS config on my web server:
> Config: v2.0.a9.oga.1 little-endian readline printim grib2 netcdf hdf4-sds
> hdf5 opendap-grids,stn athena geotiff shapefile
> Grid Analysis and Display System (GrADS) Version 2.0.a9.oga.1
> Copyright (c) 1988-2010 by Brian Doty and the
> Institute for Global Environment and Society (IGES)
> This program is distributed WITHOUT ANY WARRANTY
> See file COPYRIGHT for more information.
>
> Built Mon Oct  4 14:16:26 EDT 2010 for i686-pc-linux-gnu
>
> This version of GrADS has been configured with the following options:
>   o Built on a LITTLE ENDIAN machine
>   o Athena Widget GUI ENABLED
>   o Command line editing ENABLED
>       http://tiswww.case.edu/php/chet/readline/rltop.html
>   o printim command for image output ENABLED
>       http://www.zlib.net
>       http://www.libpng.org/pub/png/libpng.html
>       http://www.libgd.org/Main_Page
>   o GRIB2 interface ENABLED
>       http://www.ijg.org
>       http://www.ece.uvic.ca/~mdadams/jasper
>       http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2
>       g2clib-1.1.8
>   o NetCDF interface ENABLED
>       http://www.unidata.ucar.edu/software/netcdf
>       netcdf 4.1.1 of Jul 10 2010 23:36:25 $
>   o OPeNDAP gridded data interface ENABLED
>   o OPeNDAP station data interface ENABLED
>       http://iges.org/grads/gadoc/supplibs.html
>       libgadap 2.0.oga.1
>   o HDF4 and HDF5 interfaces ENABLED
>       http://hdfgroup.org
>       HDF 4.2r3
>       HDF5 1.8.4
>   o GeoTIFF and KML/TIFF output ENABLED
>       http://www.libtiff.org
>       http://geotiff.osgeo.org
>   o KML contour output ENABLED
>   o Shapefile interface ENABLED
>       http://shapelib.maptools.org
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>

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