Re: [idvdevelopers] [idvusers] follow up to previous mail: Netcdf grids and Contour2DdDisplayable

• To: Stuart Maclean <stuart@xxxxxxxxxxxxxxxxxx>
• Subject: Re: [idvdevelopers] [idvusers] follow up to previous mail: Netcdf grids and Contour2DdDisplayable
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Thu, 03 Apr 2008 19:55:01 -0600

Stuart-

I moved this over to idvdevelopers because these programming
questions are best suited for that list instead of idvusers.
We don't want to scare any novices off. ;-)

Are you printing out what gg is?  Is it possible that you are
not using the right GeoGrid (e.g. the one for surface_temperature)?
How are you subsetting the grid?  The name is only for creating the
FlatField.  You need to have the right geogrid to get the correct
data.

Don

Stuart Maclean wrote:

To update my previous mail about using a Contour2DDisplayable object and a GeoGrid from a nc file, I have discovered something odd. I printed out the domain and range values of the FlatField i am using for the Displayable. the domain has X and Y values as I expected, but the range values are off.

Given that I do this:

        GeoGridAdapter gga = new GeoGridAdapter( ggds, gg,
                                                 "surface_temperature" );
        FieldImpl fi = gga.getData();

I expected my flatfield to have values from the surface_temperature variable. However I am seeing values from some other variable, and from within the middle of the grid of data too.

It's as though the netcdf offset logic is awry.

Or maybe I am using the classes wrong.

Anyway, the Contour2Ddisplayable is handling the map projection from X, Y in the grid to lat, lon, so it is not that that is the issue, as I previously thought.

Stuart

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Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
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