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Re: 19990608: sparse grids

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  • Subject: Re: 19990608: sparse grids
  • Date: Wed, 09 Jun 1999 08:45:29 -0600
Nan,

>Date: Tue, 8 Jun 1999 22:04:51 -0600 (MDT)
>From: Nan Rosenbloom <address@hidden>
>Organization: UCAR/NCAR
>To: Steve Emmerson <address@hidden>
>Subject: Re: 19990608: sparse grids 
>Keywords: 199906082237.QAA09694

In the above message, you wrote:

> when I refer to a sparse grid, I mean that I do not represent the
> background points.  I write the netcdf file in xyt format, with
> the grid as an unlimited dimension, filling only data values,
> leaving background points out of the file (3261 pts).  
> i.e., the full grid is not represented.  only non-background points are
> represented.  To use ncview I want to _add_ the background points
> and create a file of the full grid (all 5520 cells).  Since so
> much of the information will be background values set to missing,
> I was wondering if you have a new trick to handle sparse grids
> such as this.
> 
> Here is a header from a typical file:
> netcdf txT3 {
> dimensions:
>         month = 2412 ;
>         grid = UNLIMITED ; // (3261 currently)
> variables:
>         float tx(grid, month) ;
> 
> thank you.
> 
> nanr

I understand.  No, I don't have a trick for handling sparse grids such
as this.  If ncview can't handle them, then you might look at other
application packages (e.g. VisAD).  I'm afraid I don't know enough about
such packages to make a recommendation.

--------
Steve Emmerson   <http://www.unidata.ucar.edu>