Seam where longitude wraps around in matplotlib/cartopy Mollweide projection

Question

I am plotting some NETCDF data, handled by xarray in Matplotlib using a Cartopy wrapper for the map projections. When I produce a filled contour plot (contourf), I end up with a 'seam' at longitude zero (where my data longitudes begin and end). Is there an in-line way to interpolate between longitude[-1] and longitude[0], perhaps by treating the data as periodic or something?

Please see the attached graphic for an example:

Answer 1

You should add a cyclic point to your data array and its longitude coordinate using the add_cyclic_point function: .