map - How can I make a country plot in Sage/Maxima? -

I heard that Maxima could plot the country by the Contour_Plot in the sage. Tried to import Maxima to import Maxima:

  Import from Maxima Contour_plot

I would like to make a similar map.

You probably mean a contour plot, get a quick start and paste this code into your SEZ notebook Do:

f = lambda x, y: cos (x * y)

Contour_plot (F, (-100, 4), (-4, 4))

More examples:

Brennenstuhl