.. _graphics-global_map:


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.



.. plot:: /data/local/ecamp/iris/docs/iris/example_code/graphics/global_map.py

::

    """
    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.
    
    """
    import cartopy.crs as ccrs
    import matplotlib.pyplot as plt
    
    import iris
    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
        fig = 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)
        ax = plt.subplot(122, projection=proj)
        qplt.contourf(temperature, 15)
        plt.gca().coastlines()
        plt.show()
    
    if __name__ == '__main__':
        main()