This WMS request seems to work okay:
http://thredds.ucar.edu/thredds/wms/grib/NCEP/GFS/Global_0p25deg/Best?LAYERS=u-component_of_wind_isobaric&ELEVATION=100&TIME=2016-06-20T00%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&COLORSCALERANGE=-52.3%2C160&NUMCOLORBANDS=20&LOGSCALE=false&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&FORMAT=image%2Fpng&SRS=EPSG%3A4326&BBOX=-180,-90,180,90&WIDTH=256&HEIGHT=256
On Mon, Jun 20, 2016 at 12:34 PM, Nathan Potter <ndp@xxxxxxxxxxx> wrote:
> I got that datset-subset but I can’t get ncWMS to load it because:
>
> 2016-06-20 09:22:03 ERROR NetcdfDataset:1043 - Error openDodsByReflection:
> java.lang.IllegalArgumentException: Illegal Numeric Value for Attribute
> Value for missing_value
> at ucar.nc2.dods.DODSAttribute.<init>(DODSAttribute.java:114)
> at ucar.nc2.dods.DodsV.addAttribute(DodsV.java:441)
> at ucar.nc2.dods.DodsV.addAttributeTable(DodsV.java:432)
> at ucar.nc2.dods.DodsV.parseDAS(DodsV.java:407)
> at ucar.nc2.dods.DODSNetcdfFile.<init>(DODSNetcdfFile.java:296)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at
> ucar.nc2.dataset.NetcdfDataset.openDodsByReflection(NetcdfDataset.java:1040)
>
> Which looks like a bug down inside Java-NetCDF.
>
> At least to me it looks like a bug, from the DAS:
>
> u-component_of_wind_isobaric {
> String long_name "u-component of wind @ Isobaric surface";
> String units "m/s";
> String abbreviation "UGRD";
> Float32 missing_value nan;
> String grid_mapping "LatLon_Projection";
> String coordinates "reftime time isobaric lat lon lat lon";
> String Grib_Variable_Id "VAR_0-2-2_L100";
> Int32 Grib2_Parameter 0, 2, 2;
> String Grib2_Parameter_Category "Momentum";
> String Grib2_Parameter_Name "u-component of wind";
> String Grib2_Level_Type "Isobaric surface";
> String Grib2_Generating_Process_Type "Forecast";
> }
>
>
>
> Do you know if this is a common problem with an easy workaround, or should I
> badger Unidata with a bug report?
>
> N
>
>
>
> On Jun 17, 2016, at 9:16 AM, Nathan Potter <ndp@xxxxxxxxxxx> wrote:
>
> Rich,
>
> Yeah, I do want all that. We are working on WCS for 3D+time (4 independent
> vars) and I was working to get some real test datasets.
>
>
> N
>
>
> On Jun 17, 2016, at 7:41 AM, Signell, Richard <rsignell@xxxxxxxx> wrote:
>
> Nathan,
> I took your same request, but changed the horizontal stride from 1 to
> 100 (horizStride=100)
>
> http://thredds.ucar.edu/thredds/ncss/grib/NCEP/GFS/Global_0p25deg/best?var=u-component_of_wind_isobaric&var=v-component_of_wind_isobaric&horizStride=100&time_start=2016-06-13T00%3A00%3A00Z&time_end=2016-07-02T06%3A00%3A00Z&timeStride=1&vertCoord=&addLatLon=true&accept=netcdf4
>
> It took 12 minutes, but successfully completed the request, delivering
> a 2MB netcdf4 file which I've attached and placed here:
>
> http://geoport-dev.whoi.edu/thredds/catalog/usgs/data2/rsignell/test/catalog.html?dataset=usgs/data2/rsignell/test/best.nc
>
> Checking out the DDS at
> http://geoport-dev.whoi.edu/thredds/dodsC/usgs/data2/rsignell/test/best.nc.dds
> I see that you are asking for 117 time steps, and there are 31
> vertical levels in these variables.
>
> Did you really want all that?
>
> Your original request (with horizStride=1) would have been a request
> for 100x100=10,000 times more data, or roughly 20GB of data. Perhaps
> that's why it crapped out?
>
> But I agree the original error message you received was not very
> informative.
>
> -Rich
>
>
>
> On Thu, Jun 16, 2016 at 1:18 PM, Nathan Potter <ndp@xxxxxxxxxxx> wrote:
>
>
> I used this form:
>
> http://thredds.ucar.edu/thredds/ncss/grib/NCEP/GFS/Global_0p25deg/best/dataset.html
>
> To construct this NetCDF Subset Service request:
>
> http://thredds.ucar.edu/thredds/ncss/grib/NCEP/GFS/Global_0p25deg/best?var=u-component_of_wind_isobaric&var=v-component_of_wind_isobaric&horizStride=1&time_start=2016-06-13T00%3A00%3A00Z&time_end=2016-07-02T06%3A00%3A00Z&timeStride=1&vertCoord=&addLatLon=true&accept=netcdf4
>
> Which returns the following remarkably cryptic message:
>
> first (-66) must be >= 0
>
> Does anybody have some thoughts as to what I might change to make the
> request successful, or to get a more understandable message?
>
>
> Thanks,
>
> Nathan
>
>
> = = =
> Nathan Potter ndp at opendap.org
> OPeNDAP, Inc. +1.541.231.3317
>
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>
>
> --
> Dr. Richard P. Signell (508) 457-2229
> USGS, 384 Woods Hole Rd.
> Woods Hole, MA 02543-1598
> <best.nc4>
>
>
> = = =
> Nathan Potter ndp at opendap.org
> OPeNDAP, Inc. +1.541.231.3317
>
>
> = = =
> Nathan Potter ndp at opendap.org
> OPeNDAP, Inc. +1.541.231.3317
>
--
Dr. Richard P. Signell (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598
