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Re: 20050927: computing an overlay using multiple grids

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  • Subject: Re: 20050927: computing an overlay using multiple grids
  • Date: 27 Sep 2005 13:32:21 -0600
Matt,

No. As mentioned below: Gdbiint is no longer needed.

Stick to gddiag. Gddiag can also create the new file.

Steve Chiswell
Unidata User SUpport



On Tue, 2005-09-27 at 13:26, address@hidden wrote:
> Steve,
> 
> Thanks for the response.  I am confused though, am I supposed to use
> gdbiint to perform the interpolation or not?  When I use gdbiint to
> interpolate my high-res image to the larger grid, then try use
> MISS(S1,S2), I get the following error:
> 
> Warning: range too big INF  INF -INF 214748367 16
> 
> Likewise, if I try to plot the high-res data from the new grid using a
> GAREA that extends beyond the bounds of the original high-res data, it
> lists the maximum value as INF, and the minimum value as -INF.  Since the
> original high-res grid didn't extend into these areas, why isn't GEMPAK
> just interpreting data for these areas as missing?  How can I work around
> this?
> 
> -Matt
> 
> 
> > Matt,
> >
> > The current version of GEMPAK (5.8.3a) completed the transition of
> > all grid programs to support calculations involving grids of different
> > projections/domain. Gdbiint is no longer needed.
> >
> > The MISS(S1,S2) function can be used to replace missing values in a grid
> > S1 with values in S2. You can create a new grid in a program, or through
> > gddiag and interpolate the high resolution to the new grid, and then
> > use the MISS function to set the remaining missing values to the
> > low resolution grid data values.
> >
> > Steve Chiswell
> > Unidata User Support
> >
> 
> 
>