FIX: Caught an error in polar_plot occurring with newer versions of matplotlib. (v 1.1.0 and newer). Due to changes in the API of Polar Transformations and two additions of the standard PolarAxes object, our NorthPolarAxes does not work any more, but it won't be needed any more either. Right now, the code works with both versions.
FIX: Caught an error in polar_plot occurring with newer versions of matplotlib.
(v 1.1.0 and newer).
Due to changes in the API of Polar Transformations and two additions of
the standard PolarAxes object, our NorthPolarAxes does not work any more, but
it won't be needed any more either.
Right now, the code works with both versions.

jjhelmus/wradlib,jjhelmus/wradlib