"""
Quickplot of a 2D Cube on a Map
===============================

This example demonstrates a contour plot of global air temperature. The plot
title and the labels for the axes are automatically derived from the metadata.

"""  # noqa: D205, D212, D400

import cartopy.crs as ccrs
import matplotlib.pyplot as plt

import iris
import iris.plot as iplt
import iris.quickplot as qplt


def main():
    fname = iris.sample_data_path("air_temp.pp")
    temperature = iris.load_cube(fname)

    # Plot #1: contourf with axes longitude from -180 to 180
    plt.figure(figsize=(12, 5))
    plt.subplot(121)
    qplt.contourf(temperature, 15)
    plt.gca().coastlines()

    # Plot #2: contourf with axes longitude from 0 to 360
    proj = ccrs.PlateCarree(central_longitude=-180.0)
    plt.subplot(122, projection=proj)
    qplt.contourf(temperature, 15)
    plt.gca().coastlines()
    iplt.show()


if __name__ == "__main__":
    main()