Does anyone know of a good and simple way to do it?
An online tool or a Python script would be great.
So far, the best I have found is: https://tex.stackexchange.com/questions/268830/drawing-spherical-harmonic-density-plots-on-the-surface-of-a-sphere-in-tikz-pgfp
However, I could not install mpl_toolkits.basemap and then the nice script is halted.