This by default add a padding area of nodata around the map (well at least when using plt.pcolormesh) if you do not set your Axis xmargin and ymargin to zero ax.set_xmargin (0) ax.set_ymargin (0) It ...

When axes aspect='equal', an axis with zero extent might not have any padding, which results in a completely scrambled plot. To reproduce: from matplotlib import pyplot fig = pyplot.figure() ax = ...

It is possible to set a logarithmic scale for one or both axes. This functionality is in fact only one application of a more general transformation system in Matplotlib. Each of the axes' scales are ...