[IDV #GAI-830760]: Is there a 'turnkey' application that displays trajectory plots?

Jim,

First off, what version of the IDV are you looking at? Only the nightly release
or IDV 5.0u1 (which has not been released yet, but very soon) has this new
trajectory feature. Secondly, can you upload the file in question to
http://motherlode.ucar.edu/repository/alias/idvupload and let us know when it is
there?  I am eager to see some real trajectory data since everything I have
experimented with thus far has been canned.  Moreover, there are other
researchers wanting this feature so real data will be useful for me.

Thanks for you help.

Best,

Unidata IDV Support

> Hi.
> 
> That is good timing! I tried opening my file and received this error:
> 
> Problem opening file:/Users/jbiard/Desktop/For
> Hilawe/cfs_ew_850hpa_1993_AFR.nc
> java.lang.IllegalArgumentException: Type is float,
> must be double
> Type is float, must be double
> 
> This is interesting, since there is no constraint on variable type in CF.
> 
> Grace and peace,
> 
> Jim
> 
> On 8/6/14, 2:53 PM, Unidata IDV Support wrote:
> > Jim,
> >
> > Good timing.
> >
> > As of IDV 5u1 which will be release this week, the IDV can now handle 
> > multiple
> > trajectories in one CF-compliant file. When wanting to view these data, 
> > select a
> > Data Source Type of "Trajectory Sounding Files".  You will have to build the
> > trajectory file in a CF compliant manner as described here:
> > http://www.unidata.ucar.edu/blogs/developer/en/entry/ipynb_cookbooks_to_create_cf.
> >
> > This new IDV functionality should still be considered beta quality and there
> > could very well still be problems. Please keep us up-to-date on your 
> > progress.
> >
> > Best,
> >
> > Unidata IDV Support
> >
> >
> >> Jim
> >>
> >> We plot trajectories here.
> >>
> >> http://www.esrl.noaa.gov/psd/cgi-bin/data/trajtool/traj.pl
> >>
> >> We use Fortran code to calculate the trajectories, stored the output in
> >> nertCDF and then use a NCL script to plot them. The script works pretty
> >> well (except where trajectories pass over 0E). We looked into CF complaint
> >> netCDF trajectories standard a while back but didn't implement them. Part
> >> of the reason was that the code output into it's own netCDF format. Still,
> >> we could have reread and stored the data. I think we would have needed to
> >> change how time was handled. Also, times went backward for back
> >> trajectories and we weren't clear if that was okay.
> >>
> >> We may try to transition to CF at some point.
> >>
> >> Cathy Smith
> >>
> >>
> >> On 8/6/14 8:42 AM, Jim Biard wrote:
> >>
> >> Hi.
> >>
> >> We are working on building a CF-compliant trajectory dataset. I'd like to
> >> be able to verify correctness by using an existing application to plot the
> >> trajectories, but I can't seem to find any applications that are
> >> "trajectory aware".  Any suggestions?
> >>
> >> Grace and peace,
> >>
> >> Jim
> >> --

> >>
> >> CF-metadata mailing
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> >>
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> >>
> >
> > Ticket Details
> > ===================
> > Ticket ID: GAI-830760
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed

Ticket Details
===================
Ticket ID: GAI-830760
Department: Support IDV
Priority: Normal
Status: Closed