问用histogram2d和matplotlib绘制密度等值线的结果

EN

db = 1
lon_bins = np.linspace(min(lons)-db, max(lons)+db, (max(lons)-min(lons))*100)
lat_bins = np.linspace(min(lats)-db, max(lats)+db, (max(lats)-min(lats))*100) 

h, xedges, yedges = (np.histogram2d(lats, lons,[lat_bins, lon_bins])
yi, xi = m(*np.meshgrid(lon_bins, lat_bins))
g = np.zeros(xi.shape)
g[:-1,:-1] = h
g[-1] = g[0]      # copy the top row to the bottom
g[:,-1] = g[:,0]  # copy the left column to the right
print g.shape,yi.shape,xi.shape

cs = m.contourf(yi, xi, g, cmap='Dark2')
cbar = plt.colorbar(cs, orientation='horizontal')
cbar.set_label('la densite des impacts foudre',size=18) 
plt.gcf().set_size_inches(15,15)
plt.show()