Simple script to test the latlon keword argument added to plot

latlonkwtext.py

import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap
def draw_map_background(m, ax):
    ax.set_axis_bgcolor('#729FCF')
    m.fillcontinents(color='#FAFAFA', ax=ax, zorder=0)
    m.drawstates(ax=ax)
    m.drawcountries(ax=ax)
    m.drawcoastlines(ax=ax)
KM = 1000.
clat = 39.3
clon = -94.7333
wid = 5500 * KM
hgt = 3500 * KM
m = Basemap(projection='cyl',llcrnrlat=-90,urcrnrlat=90,lon_0=0,
            llcrnrlon=-180,urcrnrlon=180,resolution='i', area_thresh=2500)
fig = plt.figure()
ax = fig.add_subplot(111)
clons = range(0, 361, 5)
clats = [i/4. for i in clons]
nclats = [-i for i in clats]
draw_map_background(m, ax)
m.plot(270, clat, 'go', latlon=True, ax=ax)
m.plot(clons, clats, 'r', latlon=True)
m.plot(clons, nclats, 'r', latlon=True)
plt.show()