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.. _example_create_imaging:
First Example
^^^^^^^^^^^^^
This example, rather than starting from a FITS header, sets WCS values
programmatically, uses those settings to transform some points, and then
saves those settings to a new FITS header.
.. literalinclude:: examples/programmatic.py
:language: python
.. note::
The members of the WCS object correspond roughly to the key/value
pairs in the FITS header. However, they are adjusted and
normalized in a number of ways that make performing the WCS
transformation easier. Therefore, they can not be relied upon to
get the original values in the header. To build up a FITS header
directly and specifically, use `astropy.io.fits.Header` directly.
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