I am trying to make a contour plot of a geographical feature using matplotlib. I have data for the x, y, and z coordinates of about 47 points on this geographical feature. z is not a function of x and y. The documentation and guides I have read indicate that matplotlib only can make a contour plot if z is some function of x and y.
My question is: how do I make a contour plot on matplotlib with the x, y, and z points I have, where z ≠ f(x,y)?