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Re: Spherical gridding [message #35481 is a reply to message #21747]

Thu, 19 June 2003 11:45

Haje Korth
Messages: 651
Registered: May 1997

Senior Member

Liam,
I just checked IDL and the docs. It is documented in 'What's new in IDL 5.5'
on page 228 and works fine in IDL 5.5 and 5.6, as well as 6.0 beta. I found
a bug with griddata that crashes IDL in a certain keyword combination if you
try to interpolate data poleward of the highest latitude data value. It is
logged with RSI and will be fixed. However, on UNIX the error does not occur
and most people will probably never notice this one!

Haje

--
Dr. Haje Korth
Space Physics Group
The Johns Hopkins University
Applied Physics Laboratory
MS MP3-E128
11100 Johns Hopkins Road
Laurel, MD 20723-6099
USA
Phone: 240-228-4033 (Washington), 443-778-4033 (Baltimore)
Fax: 240-228-0386 (Washington), 443-778-0386 (Baltimore)
e-mail: haje.korth@jhuapl.edu

"Liam Gumley" <Liam.Gumley@ssec.wisc.edu> wrote in message
news:bcsi25$nhd$1@news.doit.wisc.edu...
> It's not included in my SGI version of IDL 5.5.
>
> Cheers,
> Liam.
> Practical IDL Programming
> http://www.gumley.com/
>
> "Haje Korth" <haje.korth@jhuapl.edu> wrote in message
> news:bcs8ba$24n$1@houston.jhuapl.edu...
>> I am using "griddata", which has been included with IDL since version
5.5.
>> It is much more powerful than sph_sct.
>>
>> Haje
>>
>>
>> --
>>
>> "Elias J. Hunter" <hunter@imcs.rutgers.edu> wrote in message
>> news:3EF0A470.1080008@imcs.rutgers.edu...
>>> Hello,
>>>
>>> I have a matrix of surface pressure north of 60N, that is currently on
a
>>> gaussian lat-lon grid. My goal is to interpolate this grid to a one
>>> degree by one degree lat-lon grid. Now when I attempt this using
>>> sph_sct, the field south of 75 degrees lat looks good, the grid north
of
>>> 75 degrees lat is a mess.
>>>
>>> My guess is that the longitudinal resolution north of 75 degrees on
the
>>> new grid is so fine relative to the old grid, its creating a problem.
I
>>> suppose it could also be becasue I'm getting closer to the singularity
>>> at the pole.
>>>
>>> Has anybody addressed a similar difficulty using sph_scat?
>>>
>>> Thanks,
>>> Eli
>>>
>>
>>
>
>

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[Message index]

		spherical gridding By: Sylvain Carette on Sun, 17 September 2000 00:00
		Re: Spherical gridding By: JD Smith on Thu, 19 June 2003 15:31
		Re: Spherical gridding By: Liam E. Gumley on Thu, 19 June 2003 12:17
		Re: Spherical gridding By: Liam E. Gumley on Thu, 19 June 2003 12:14
		Re: Spherical gridding By: Haje Korth on Thu, 19 June 2003 11:45
		Re: Spherical gridding By: Haje Korth on Thu, 19 June 2003 11:42
		Re: Spherical gridding By: Ben Tupper on Thu, 19 June 2003 10:11
		Re: Spherical gridding By: Paul Van Delst[1] on Thu, 19 June 2003 09:32
		Re: Spherical gridding By: Ben Tupper on Thu, 19 June 2003 09:14
		Re: Spherical gridding By: hunter on Thu, 19 June 2003 08:35
		Re: Spherical gridding By: hunter on Fri, 20 June 2003 11:06
		Re: Spherical gridding By: Liam E. Gumley on Thu, 19 June 2003 07:41
		Re: Spherical gridding By: Haje Korth on Thu, 19 June 2003 04:54
		Re: Spherical gridding By: wmconnolley on Wed, 18 June 2003 12:09

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