title: Make a map of density out of list of coordinates and density
body: <p>On Python, I need to create a map of density out of 3 lists: a list of density, and 2 list of coordinates in longitude and latitude.
  It's organized like this: the first density coordinates are the first element of latitude and longitude lists.</p>
  <p>The only way I found is to use matplotlib.scatter with colorbar, but I'd like to know if there was better ways to do it ?</p>
  <p>I tried seaborn.heatmap, but I did not succeed at making a proper dataframe out of my lists.</p>