Periodic Axes class in matplotlib?

Question

I have a collection of latitude/longitude points that straddle the longitude=0 line. I'd like to plot these using a matplotlib Axes class that "wraps" the horizontal dimension such that, when looking towards l=360, points at l=1 are plotted at the equivalent of l=361. Ideally, I'd also like something that defines the pan/zoom actions so I can use the plot interactively.

I know that it is possible to define custom projections in matplotlib, but I haven't found the equivalent of a Cylindrical projection that implements all of this functionality. I'd rather not use basemap. Does anyone know if something like this exists somewhere?

Answer 1

You can get exactly what you are asking for by modifying the mathplotlib exapmle - api example code: custom_projection_example.py you just need to decide if you would like a spherical representation or cylindrical - if the latter then you may find more useful code in the custom_scale_example.py which also includes panning and zooming but in the example deliberatly limits the data to +-90 degrees - you will need to wrap instead.