Re: LinearLatLonSet

• To: John C Cartwright <John.C.Cartwright@xxxxxxxx>
• Subject: Re: LinearLatLonSet
• From: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Date: Wed, 14 Jul 2004 13:24:19 -0500 (CDT)

Hi John,

The image attached to your email is displayed using texture
mapping, so interpolation is not used. Also, your lower and
upper longitude bounds (-180 and +180) are "equal", so there
would be no meaningful interpolation between them anyway.
LinearLatLonSet is only useful if your application is using
interpolation and you have a truly "circular" longitude
sampling (say every 5 degrees from -177.5 to +177.5). Sorry
to say I don't know of an example using LinearLatLonSet.

Good luck,
Bill

On Wed, 14 Jul 2004, John C Cartwright wrote:

> Hello All,
>
> I'm trying to employ the LinearLatLonSet to take advantage of the
> longitude "wrapping".  Can someone provide me an example of how to
> properly use this?  Although I can get an image, it's not clear to me
> that any interpolation is occurring across the longitude boundary. Test
> case is based on example P3_2 in the tutorial and salient parts of the
> code are listed below.
>
>
>      int NCOLS = 5;
>      int NROWS = 6;
>
>      latitude = RealType.Latitude;
>      longitude = RealType.Longitude;
>      domain_tuple = new RealTupleType(latitude, longitude);
>
>      domain_set = new LinearLatLonSet(domain_tuple, -90.0, 90.0, NROWS,
>                                              -180, 180.0, NCOLS);
>
>
>
> Thanks for your help!
>
> -- john
>
> ====================================================
> John Cartwright
> Associate Scientist
> Geospatial Data Services Group
> CIRES, National Geophysical Data Center/NOAA
> (303) 497-6284
> John.C.Cartwright@xxxxxxxx
> ====================================================
>
>

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• References:
  • LinearLatLonSet
    • From: John C Cartwright