basemap (like matplotlib) has the contourf method. You can calculate your x, y, and z values using matplotlib.mlab.griddata (altho scipy's are faster), and pass

basemap (like matplotlib) has the contourf method. You can calculate your x, y, and z values using matplotlib.mlab.griddata (altho scipy's are faster), and pass the results to it: https://stackoverflow.com/a/26885815/416626 https://stackoverflow.com/a/26885815/416626