.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/hpx2grid.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_auto_examples_hpx2grid.py>`
        to download the full example code

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

.. _sphx_glr_auto_examples_hpx2grid.py:


HealPIX Image visualization
---------------------------

HealPIX maps can be viewed as a 2D image rotated by 45 deg. This is useful for
quick visualization with image viewers without distorting the native pixels of
the image.

.. GENERATED FROM PYTHON SOURCE LINES 23-28

.. code-block:: Python


    import matplotlib.pyplot as plt
    import numpy as np
    import torch








.. GENERATED FROM PYTHON SOURCE LINES 29-47

.. code-block:: Python

    from matplotlib.colors import Normalize
    from PIL import Image

    from earth2grid.healpix import Grid

    grid = Grid(level=8)
    lat = torch.tensor(grid.lat)
    lat_img = grid.to_image(lat)

    # Use Image to save at full resolution
    normalizer = Normalize(vmin=np.nanmin(lat_img), vmax=np.nanmax(lat_img))
    array = normalizer(lat_img)
    array = plt.cm.viridis(array)
    array = (256 * array).astype("uint8")
    # set transparency for nans
    array[..., -1] = np.where(np.isnan(lat_img), 0, 255)
    image = Image.fromarray(array)
    image.save("hpx_grid.png")



.. image-sg:: /auto_examples/images/sphx_glr_hpx2grid_001.png
   :alt: hpx2grid
   :srcset: /auto_examples/images/sphx_glr_hpx2grid_001.png
   :class: sphx-glr-single-img


.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    Warning, cannot find healpixpad module





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

   **Total running time of the script:** (0 minutes 1.719 seconds)


.. _sphx_glr_download_auto_examples_hpx2grid.py:

.. only:: html

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

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

      :download:`Download Jupyter notebook: hpx2grid.ipynb <hpx2grid.ipynb>`

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

      :download:`Download Python source code: hpx2grid.py <hpx2grid.py>`


.. only:: html

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

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