Re: Ngl.contour_map bug when constant field left of 0 lon

Sorry Michael, we let this message slip unintentionally.

The first thought that I had on this was that the longitude coordinate array is incorrect or not set at all.

I actually tried running your script when you originally sent it, but it was seg faulting for me. I think my python installation is messed up. I don't think this is an issue with your script.

I'll try to look at this tonight or tomorrow. AGain, sorry for the delay.

--Mary

On Nov 4, 2010, at 7:38 AM, Michael Decker wrote:

> Hi Mary, Dave and everyone,
>
> (I'm not really sure if my previous mail made it as it was a little too big with the original eps attachments. So there it is again with pngs instead.)
>
> we recently stumbled upon a bug in Ngl.contour_map that happens when there is a constant field value left of 0 degrees longitude on the map. The plot will simply be white/transparent on the whole left side then. As soon as one different value appears in that field, everything works as expected. This only happens left of 0 degrees. If 0 is shifted completely to the left side of the map, then the constant area is displayed just fine (then on the right side).
>
> I'm probably not very good at explaining that, so I attached a simple demo script and three output files generated by it (originally eps, converted to png for size).
> test.png: 0 degrees in the middle of the map, constant field on the left is all white
> test2.png: left side contains one other value and it works like it should
> test3.png: 0 degrees shifted to the left of map, same data as for test.png but like this it works just fine
>
> Cheers,
> Michael
>
> --
> Michael Decker
> Forschungszentrum Jülich
> Institut für Energie- und Klimaforschung - Troposphäre (IEK-8)
>
> E-Mail: m.decker@fz-juelich.de
>
> <pyngl_error.py><test.png><test2.png><test3.png>_______________________________________________
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Received on Thu Nov 4 17:21:34 2010