[IDV #XWV-899527]: IDV - sigma levels in netcdf file

Hi Mark-

> Institution: Univ. of Colorado
> Package Version: 2.1
> Operating System: Linux
> Hardware Information: Java: home: /usr/local/idv/IDV_2.1/jre version: 
> 1.5.0_06 j3d:1.3.1
> Inquiry: Overall, I have had lots of success and fun in getting my netcdf 
> data from the
> AMPS archive into IDV.  However, it has not been completely successful.  In my
> netcdf file I am attempting use both pressure and sigma vertical coordinates.
> When I use pressure it works wonderfully, when I use sigma, I get this error:
> 
> An error has occurred:
> Couldn't get data
> Gridded3DSet: samples do not form a valid grid (51,9,0)

The problem is that your latitudes change direction at the 52 point:

[48]: 18.218628,-87.33871,5673.8726
[49]: 12.376205,-87.41195,5656.7305
[50]: 6.261139,-87.45691,5609.3237
[51]: 0.0,-87.47207,5539.839
[52]: -6.261139,-87.45691,5506.035
[53]: -12.376221,-87.41195,5472.393
[54]: -18.218628,-87.33871,5419.2974

where I would expect them to change at the 103 point since yc is
dimensioned to be 102.  Am I missreading that?  Is this an artifact
of the pole?

The fact that the pressure levels work is a fluke in that we
don't check for grid consistency.  For a grid like this, that would
probably lead to problems on data probing.

> The netcdf file can be accessed at:
> http://foehn.colorado.edu/antarctica/amps/nc/200502.nc
> 
> I have checked this file against the CF checker
> http://titania.badc.rl.ac.uk/cgi-bin/cf-checker.pl
> and
> http://motherlode.ucar.edu:8080/thredds/cdmValidate.html
> with no noticeable errors to my amateur eye.
> 
> I'd appreciate any help.

Don Murray

> ******************
> Stack trace:
> visad.SetException: Gridded3DSet: samples do not form a valid grid (51,9,0)
> at visad.Gridded3DSet.<init>(Gridded3DSet.java:327)
> at visad.GriddedSet.create(GriddedSet.java:218)
> at visad.GriddedSet.create(GriddedSet.java:130)
> at 
> visad.EmpiricalCoordinateSystem.ensureNoCoordinateSystem(EmpiricalCoordinateSystem.java:108)
> at visad.EmpiricalCoordinateSystem.<init>(EmpiricalCoordinateSystem.java:81)
> at 
> ucar.unidata.data.grid.GeoGridAdapter.makeDomainWithVerticalTransform(GeoGridAdapter.java:927)
> at 
> ucar.unidata.data.grid.GeoGridAdapter.getSpatialDomainSet(GeoGridAdapter.java:411)
> at 
> ucar.unidata.data.grid.GeoGridAdapter.getFlatField(GeoGridAdapter.java:1033)
> at 
> ucar.unidata.data.grid.GeoGridAdapter.makeSequence(GeoGridAdapter.java:1181)
> at ucar.unidata.data.grid.GeoGridAdapter.getSequence(GeoGridAdapter.java:983)
> at 
> ucar.unidata.data.grid.GeoGridDataSource.makeFieldImpl(GeoGridDataSource.java:832)
> at 
> ucar.unidata.data.grid.GeoGridDataSource.getDataInner(GeoGridDataSource.java:604)
> at ucar.unidata.data.DataSourceImpl.getData(DataSourceImpl.java:1510)
> at ucar.unidata.data.DirectDataChoice.getData(DirectDataChoice.java:319)
> at ucar.unidata.data.DataChoice.getData(DataChoice.java:550)
> at ucar.unidata.data.DataInstance.getData(DataInstance.java:239)
> at ucar.unidata.data.DataInstance.getData(DataInstance.java:203)
> at ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:204)
> at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:161)
> at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:142)
> at 
> ucar.unidata.idv.control.PlanViewControl.doMakeDataInstance(PlanViewControl.java:1050)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:2719)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:2701)
> at ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:415)
> at 
> ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:115)
> at ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:321)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1172)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:925)
> at ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:946)
> at ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:874)
> at ucar.unidata.util.Misc$2.run(Misc.java:931)
> 
> 
> 


Ticket Details
===================
Ticket ID: XWV-899527
Department: Support IDV
Priority: Normal
Status: Open