Date: Mon Jul 23 2012 - 10:02:53 MDT
Hi,
Just as Rick answered your question, I was finishing up an example.
He's right, you need to programmatically generate intermediate points along each lat/lon line, which you can do with the gc_latlon function.
See attached example and images. Since we don't have your data, I took your script, removed all the contouring stuff, and made a best guess at the lat/lon corners.
This example was taken from example polyg_13.ncl at:
http://www.ncl.ucar.edu/Applications/polyg.shtml#ex13
--Mary
On Jul 23, 2012, at 9:57 AM, Rick Brownrigg wrote:
> Hi Karin,
>
> I take it the lines of the polygon are along constant lines of lat/lon? One thing that comes to mind is to programmatically generate samples at intermediate points along the lines of lat/lon, to approximate the curved lines. I haven't tried this (I don't have your dataset handy), but it should work.
>
> Hope that helps…
> Rick
>
> On Jul 23, 2012, at 8:11 AM, Karin Meier-Fleischer wrote:
>
>> Hi,
>>
>> unfortunately, I have problems drawing an opac polygon on a the orography data field (on a rotated grid).
>> It was not a problem to plot the map and the contour lines of the orography, but the polygon always
>> has straight edges instead curved ones.
>>
>> I want to display different regions with different grid resolutions in one picture to have a nice overview
>> of the different domains. I append the script and a small plot.
>>
>> Any help would be appreciated.
>>
>> Thanks,
>> Karin
>>
>> --
>> Karin Meier-Fleischer
>>
>> Department Data Management
>> Deutsches Klimarechenzentrum GmbH
>> Bundesstrasse 45a
>> D-20146 Hamburg, Germany
>> email:
>> meier-fleischer@dkrz.de
>>
>> phone: +49 40 41173 288
>> fax: +49 40 41173 476
>>
>> http://www.dkrz.de/
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