File: v0.19.rst

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Version 0.19 (April 21, 2021)
=============================

For a full list of included Pull Requests and closed Issues, please see the
`0.19 milestone <https://github.com/SciTools/cartopy/milestone/27>`_.

Features
--------

* Thomas Grainger restored PEP-517 support to improve installations.
  (:pull:`1681`)

* @emsterr added the ability to style bounding boxes of labels. (:pull:`1669`)

* Adrien Berchet added the ability to cache downloaded image tiles.
  (:pull:`1533`)

* Greg Lucas changed the vector interpolations to be strictly in the
  source coordinates, which removed some erroneous extrapolations.
  (:pull:`1636`)

* Giacomo Caria added an option to remove the cardinal direction labels
  from the axes. (:pull:`1662`)

* Greg Lucas added the ability to update data within a pcolormesh plot
  using `set_array()` to enable animations of the fields. (:pull:`1496`)
  Liam Bindle extended this capability to update the color limits
  (:pull:`1655`) and Sebastian David Eastham fixed the return values when
  `get_array()` was called (:pull:`1656`)

.. figure:: ../gallery/miscellanea/images/sphx_glr_animate_surface_001.gif
   :target: ../gallery/miscellanea/animate_surface.html
   :align: center

* @htonchia and Greg Lucas fixed an issue with large cells appearing in
  pcolormesh plots. (:pull:`1622`)

* Philippe Miron added an example to demonstrate how to label specific
  sides of the plot. (:pull:`1593`)

* Greg Lucas added the option to restrict the limits of gridlines. (:pull:`1574`)

* Kyle Penner fixed extrapolations using an alpha-channel in imshow().
  (:pull:`1582`)

* Valentin Iovene added pkg-config instructions to help with installations on
  MacOS. (:pull:`1596`)

* Luke Davis updated the tight bbox calculations to include the gridliner labels.
  (:pull:`1355`)

* Luke Davis fixed the label padding for gridliners to use points which makes
  the rendered screen image appear the same as the printed image now.
  (:pull:`1556`)
  
* Daryl Herzmann added the ability to make Hexbin plots. (:pull:`1542`)

    .. plot::
       :width: 400pt

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

        fig = plt.figure(figsize=(10, 5))
        ax = plt.axes(projection=ccrs.Robinson())
        ax.coastlines()

        x, y = np.meshgrid(np.arange(-179, 181), np.arange(-90, 91))
        data = np.sqrt(x**2 + y**2)
        ax.hexbin(x.flatten(), y.flatten(), C=data.flatten(),
                  gridsize=20, transform=ccrs.PlateCarree())
        plt.show()

* Kyle Penner fixed image plotting when a 2D alpha array is input. (:pull:`1543`)

* Elliott Sales de Andrade and Hugo van Kemenade removed Python 2 support.
  (:pull:`1516`, :pull:`1517`, :pull:`1540`, :pull:`1544`, and :pull:`1547`)