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Re: about contour [message #36851 is a reply to message #28256]

Fri, 31 October 2003 06:08

btt
Messages: 345
Registered: December 2000

Senior Member

Christopher Lee wrote:
> In article <oGVnb.4174$Nm6.241992@news20.bellglobal.com>, "Chris"
> <not@this.address> wrote:
>
>
>
>> news:20031029.092226.1398295499.15916@buckley.atm.ox.ac.uk.. .
>>
>>> In article <eceee805.0310282257.1de74ee3@posting.google.com>, "Park
>>> Kyung Won" <parkkw@mail1.pknu.ac.kr> wrote:
>
> <snip>
>
>>> Use SPH_SCAT...e.g.
>>>
>
>
>> Can't he use just:
>> contour,rainfall,longitude,latitude,/irregular ;; (assuming lat & lon
>> are in decimal degrees)
>> something like that; plus play around with levels, etc. I don't have IDL
>> up and running right now, so I don't remember :( (another) Chris
>
>
>
>
> You can use /irregular (even though my contour wrapper seems to make a
> dog's breakfast out of it...) to plot the data, but it looks "better" on
> the plot with sph_scat, how much non-existent data the interpolation has
> added I don't know.
>
> In the IDL helpfile example for SPH_SCAT (a sine wave in longitude and
> cosine in latitude I think) the circles on the map appear as circles using
> SPH_SCAT, but they appear as jaggy polygons (reflecting the data) using
> /irregular.
>
> Chris.

Hi,

A couple of other options:

Use the newish GRID_INPUT/GRIDDATA functions that appeared with IDL5.5 These
functions provide many features for sampling the data onto a grid before
contouring.

Use the new iTools contour tool that provides a nice GUI to the GRIDDATA function.

Ben

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[Message index]

		about contour By: tom on Tue, 27 November 2001 16:49
		Re: about contour By: Chris Lee on Wed, 29 October 2003 01:22
		Re: about contour By: Chris[1] on Wed, 29 October 2003 12:56
		Re: about contour By: btt on Fri, 31 October 2003 06:08
		Re: about contour By: Chris Lee on Thu, 30 October 2003 01:13
		Re: about contour By: Chris Lee on Thu, 30 October 2003 01:06
		Re: about contour By: parkkw on Wed, 29 October 2003 21:03

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