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[IDV #FGA-644757]: IDV - sigma-levels over Antarctica - part 2

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  • Subject: [IDV #FGA-644757]: IDV - sigma-levels over Antarctica - part 2
  • Date: Thu, 12 Apr 2007 15:36:18 -0600
Hi Mark-

> > were you able to display the sigma levels if you got
> > rid of the lat/lon variables in the file?
> 
> I ended up not doing this test.  I could not convince myself that IDV
> would be able to place the data correctly without the lat/lon variables.
> Specifically, without anything to indicate grid point spacing, how can
> the locations be determined from the given projection information?  For
> example a year ago AMPS switched to 20km instead of 30km resolution for
> this domain.  The projection information is the same as only the grid
> point spacing changed.  Then there is also the problem that the center
> of the model projection is not the center of the netcdf data.

The projection defines the region of coverage.  The number of gridpoints
will determine the resolution.  So presumably when they went from 30km
to 20km, there were more grid points in the x and y direction.

The projection should define the region of coverage.

> If you still think this is a worthwhile test, let me know, and I'll make
> the changes.

Try it out if you can.

Don

Ticket Details
===================
Ticket ID: FGA-644757
Department: Support IDV
Priority: Urgent
Status: Open