python basemap 中一些函数括号内值的含义与用法

官方网页：

http://matplotlib.org/basemap/api/basemap_api.html#mpl_toolkits.basemap.Basemap.contour

如：

 

contour(x, y, data, *args, **kwargs)

Make a contour plot over the map(see matplotlib.pyplot.contour documentation).

If latlon keyword is set to True, x,y are intrepreted aslongitude and latitude in degrees. Data and longitudes areautomatically shifted to match map projection region for cylindricaland pseudocylindrical projections, and x,y are transformed to mapprojection coordinates. If latlon is False (default), x and yare assumed to be map projection coordinates.

Extra keyword ax can be used to override the default axis instance.

If tri is set to True, an unstructured grid is assumed(x,y,data must be 1-d) and matplotlib.pyplot.tricontour is used.

Other *args and **kwargs passed on to matplotlib.pyplot.contour(or tricontour if tri=True).