Re: [ferret_users] Accessing a DODS Aggregation Server with Ferret

[John Schattel <john.schattel@xxxxxxxx>]

Tony,

Your suspicions were on the money.  I tried your test and it worked as 
predicted.  My version of Ferret worked with datasets from the first URL 
but not the second.  So, I'll look into installing thredds.war (version 
2) and see if that takes care of my problems.

Again, thanks so much for the assistance with this issue.

John

Tony Jolibois wrote:

>       Hi Jon,
>
> Maybe it is a compatibility problem between ferret and Opendap 
> aggregation server, I would like to hear ferret or dods administrator 
> about this question.
>
> I had a lot of problem with that : dodsC.war is an old version of 
> Opendap data server, and ferret V5.6 and + can not access datasets 
> served by this old server. You must use older version of ferret to 
> access it.
> With your version of ferret try a dataset form these servers and see 
> if you can connect : http://opendap.aviso.oceanobs.com/thredds/dodsC/ 
> (version 2.0) and this one http://opendap.aviso.oceanobs.com/dodsC/ 
> which is older. Maybe you can access first but not the second if you 
> have ferret v5.6 +.
>
> The new Opendap aggregation server, which is named now thredds.war, 
> version 2.0 is available here : 
> http://www.unidata.ucar.edu/projects/THREDDS/tech/server/ServerStatus.html, 
> same version first server Aviso.
>
> Version 3.2 (latest version) is available here : 
> http://www.unidata.ucar.edu/projects/THREDDS/tech/index.html#TDS
>
> Best regards,
> Tony
>
> John Schattel wrote:
>
> > Hi All,
> >
> > I recently set up a DODS aggregation server 
> > (http://www.unidata.ucar.edu/projects/THREDDS/tech/aggServer/AggServerStatus.html).  
> > But, Ferret is balking at the aggregated "netCDF file".  The 
> > following link shows the content of the aggregated data (3 files each 
> > containing 15 time periods --> an aggregate of 45 time periods):
> >
> > http://205.156.4.56:8080/dodsC/ngom/ngom_agg.nc.dds
> >
> > Dataset {
> >    Float32 time[time = 45];
> >    Float32 lon[ny = 160][nx = 217];
> >    Float32 lat[ny = 160][nx = 217];
> >    Float32 mask[ny = 160][nx = 217];
> >    Float32 depth[ny = 160][nx = 217];
> >    Float32 sigma[sigma = 37];
> >    Float32 zeta[time = 45][ny = 160][nx = 217];
> >    Float32 u[time = 45][sigma = 37][ny = 160][nx = 217];
> >    Float32 v[time = 45][sigma = 37][ny = 160][nx = 217];
> >    Float32 temp[time = 45][sigma = 37][ny = 160][nx = 217];
> >    Float32 salt[time = 45][sigma = 37][ny = 160][nx = 217];
> > } ngom/ngom_agg.nc;
> >
> > But when I use the dataset in Ferret, it doesn't seem to recognize 
> > the netCDF format.
> >
> > yes? use "http://205.156.4.56:8080/dodsC/ngom/ngom_agg.nc";
> > ** netCDF error: Invalid Argument
> > is this a CDF file ?
> > yes?
> >
> > Should Ferret be able to use a DODS aggregation server aggregate?  Is 
> > so, can anyone suggest what might be going wrong with either Ferret 
> > or the aggregation server?
> >
> > In advance, thanks for any help you can offer.
> >
> > John