Hide contour linestroke on pyplot.contourf to get only fills

Question

I have a pet project to create images of maps, where I draw the roads and other stuff over a contour plot of the terrain elevation. It is intended to plan mountain bike rout

Answer 1

The posted solution did not work for me with alpha set to <1, but I found the answer in this solution: Matplotlib Contourf Plots Unwanted Outlines when Alpha < 1

Adding the argument antialiased=True solved the issue for me.