.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/miscellanea/tube_stations.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_gallery_miscellanea_tube_stations.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_miscellanea_tube_stations.py:


Tube Stations
-------------

Produces a map showing London Underground station locations with high
resolution background imagery provided by OpenStreetMap.

.. GENERATED FROM PYTHON SOURCE LINES 9-72



.. image-sg:: /gallery/miscellanea/images/sphx_glr_tube_stations_001.png
   :alt: London underground locations
   :srcset: /gallery/miscellanea/images/sphx_glr_tube_stations_001.png
   :class: sphx-glr-single-img





.. code-block:: Python

    from matplotlib.path import Path
    import matplotlib.pyplot as plt
    import numpy as np

    import cartopy.crs as ccrs
    from cartopy.io.img_tiles import OSM


    def tube_locations():
        """
        Return an (n, 2) array of selected London Tube locations in Ordnance
        Survey GB coordinates.

        Source: https://www.doogal.co.uk/london_stations.php

        """
        return np.array([[531738., 180890.], [532379., 179734.],
                         [531096., 181642.], [530234., 180492.],
                         [531688., 181150.], [530242., 180982.],
                         [531940., 179144.], [530406., 180380.],
                         [529012., 180283.], [530553., 181488.],
                         [531165., 179489.], [529987., 180812.],
                         [532347., 180962.], [529102., 181227.],
                         [529612., 180625.], [531566., 180025.],
                         [529629., 179503.], [532105., 181261.],
                         [530995., 180810.], [529774., 181354.],
                         [528941., 179131.], [531050., 179933.],
                         [530240., 179718.]])


    def main():
        imagery = OSM()

        fig = plt.figure()
        ax = fig.add_subplot(1, 1, 1, projection=imagery.crs)
        ax.set_extent([-0.14, -0.1, 51.495, 51.515], ccrs.PlateCarree())

        # Construct concentric circles and a rectangle,
        # suitable for a London Underground logo.
        theta = np.linspace(0, 2 * np.pi, 100)
        circle_verts = np.vstack([np.sin(theta), np.cos(theta)]).T
        concentric_circle = Path.make_compound_path(Path(circle_verts[::-1]),
                                                    Path(circle_verts * 0.6))

        rectangle = Path([[-1.1, -0.2], [1, -0.2], [1, 0.3], [-1.1, 0.3]])

        # Add the imagery to the map.
        ax.add_image(imagery, 14)

        # Plot the locations twice, first with the red concentric circles,
        # then with the blue rectangle.
        xs, ys = tube_locations().T
        ax.plot(xs, ys, transform=ccrs.OSGB(approx=False),
                marker=concentric_circle, color='red', markersize=9, linestyle='')
        ax.plot(xs, ys, transform=ccrs.OSGB(approx=False),
                marker=rectangle, color='blue', markersize=11, linestyle='')

        ax.set_title('London underground locations')
        plt.show()


    if __name__ == '__main__':
        main()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.313 seconds)


.. _sphx_glr_download_gallery_miscellanea_tube_stations.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: tube_stations.ipynb <tube_stations.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: tube_stations.py <tube_stations.py>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_