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[IDV #NNP-883811]: IDV and Sigma coordinates

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  • Subject: [IDV #NNP-883811]: IDV and Sigma coordinates
  • Date: Thu, 19 Jul 2012 10:25:10 -0600
Greetings Carlos,

Yuan is out the rest of the week, but I'd be happy to take a look at this 
issue for you. Would it be possible for us to get a sample data file? It'd
likely be too big to attached through support, but we have a place you
could upload a sample if you're willing. Just let me know.

Cheers,

Sean

> Hi,
> Thank you for the fast reply.
> 
> Some 3D visualizations work ok with Sigma.
> 
> But when we try to represent "Absolute vorticity" using "Isosurface" IDV
> shows the message "Unknown vertical coordinate with Unit null, using linear
> scale to Altitude". And the representation apeears flattened.
> 
> There is another option to represent isosurface using Sigma coordinates?
> 
> 
> Thank you
> 
> Carlos
> 
> 
> 2012/7/17 Unidata IDV Support <address@hidden>
> 
> > > Dear IDV support,
> > >
> > > We are using IDV to represent in 3D mode, outputs from meteorological and
> > > oceanographic circulation models.
> > >
> > > Both our models work in sigma coordinates. At the moment we can calculate
> > > the z-level equivalent from the ocean model file outside IDV.
> > >
> > > Is there a way of converting from Sigma to Zlevel (altitude in meters)
> > > Inside IDV, the meteorological files? The meteorological model is MM5
> > >
> > Carlos,
> >
> > The answer is yes, but no a good idea to let the IDV doing this kind of
> > translation. The IDV can handle sigma coordinate system, and you may not
> > need to convert the to the z level depending on the requirement.
> >
> >
> > Yuan
> > > The sigma levels in our MM5 meteorological files:
> > > .05 .125 .175 .225 .275 .325 .375 .425 .465 .49 .51 .535 .575 .625 .675
> > > .725 .775 .825 .89 .92 .95 .97 .985 .995
> > >
> > >
> > > Thanks in advance.
> > >
> > > Carlos Lucas
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: NNP-883811
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> >
> 
> 
> --
> Carlos Miguel Lucas
> 
> 


Ticket Details
===================
Ticket ID: NNP-883811
Department: Support IDV
Priority: Normal
Status: Open