| Re: Streamlining [message #24433 is a reply to message #24121] |
Thu, 29 March 2001 01:45  |
Martin Schultz
Messages: 515
Registered: August 1997
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Senior Member |
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Robert Dahni wrote:
>
> "Amara Graps" <Amara.Graps@mpi-hd.removethis.mpg.de> wrote in message
> news:3AB8F8B4.F30A203C@mpi-hd.removethis.mpg.de...
>> Vapuser wrote:
>>>
>>> Anyone have an good IDL streamlining code? Or know where I can get
>>> some? I'll even entertain the notions of call_external/linkimage code.
>>>
>>
>> Dear William,
>>
>> I honestly don't know if the following attached program
>> ("test_strfield") is useful for you.
>>
>> The attached code is a bit old (circa 1993), but I just ran it under
>> 5.4, and it runs fine. It's well-documented, however it has not been
>> tested under different functions and datasets. It's not particularly
>> elegant IDL programming style either, but it works.
>>
>> The code is simply the result of my own learning processes for how
>> stream functions work. (I'm not sure the "proper way" that
>> meteorologists conventionally define stream functions, maybe
>> someone can tell me... but in a few weeks.)
>
> I am currently looking at IDL 's ability to automatically plot "streamlines"
> from the
> wind field (u,v components) from a meteorologist's point of view.
>
> I have used the procedures PARTICLE_TRACE, PLOTS and ARROW with success
> (IDL V5.3 on Windows).
>
> Take a look at this example
> http://www.metvis.com.au/graphics/streamline.jpg.
>
> Robert Dahni
> Meteorologist, IDL Programmer
> Bureau of Meteorology, Melbourne, AUSTRALIA
> r.dahni@bom.gov.au
Hi Robert,
that looks really nice. Where did you get this "background" image
from? Is this something that's publically available? Does it cover the
whole earth and can you zoom in at will? This looks far nicer than the
plain IDL map background...
Regards,
Martin
--
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[
[[ Dr. Martin Schultz Max-Planck-Institut fuer Meteorologie [[
[[ Bundesstr. 55, 20146 Hamburg [[
[[ phone: +49 40 41173-308 [[
[[ fax: +49 40 41173-298 [[
[[ martin.schultz@dkrz.de [[
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