Re: LinearLatLonSet

["John C Cartwright" <John.C.Cartwright@xxxxxxxx>]

Thanks for your prompt reply, Bill.  I modified the code to change the 
longitude range and disable the texture mapping.  The results are still 
not what I expect. Can you shed any light on what I'm doing wrong?

    latitude = RealType.Latitude;
    longitude = RealType.Longitude;
    domain_tuple = new RealTupleType(latitude, longitude);

    int NCOLS = 5;
    int NROWS = 6;

    domain_set = new LinearLatLonSet(domain_tuple, -90.0, 90.0, NROWS,
                                               -180, 108.0, NCOLS);
    dispGMC.setTextureEnable(false);


-- john


Bill Hibbard wrote:
> 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
> > ====================================================


--
====================================================
John Cartwright
Associate Scientist
Geospatial Data Services Group
CIRES, National Geophysical Data Center/NOAA
(303) 497-6284
John.C.Cartwright@xxxxxxxx
====================================================