.. _coordinate_system:

Coordinate system
=================

NeXus follows the `NeXus coordinate system <https://manual.nexusformat.org/_static/NeXusManual.pdf#page=30&zoom=100,96,218>`_, which matches the `McStas <https://mcstas.org/>`_ conventions.

.. image:: img/coordinate_system/coordinate_system_nexus.svg
   :width: 600 px
   :align: center

.. warning::
    For ESRF users, Bliss-tomo acquisition system uses the following coordinate system:

    .. image:: img/coordinate_system/coordinate_system_bliss_tomo.png
        :width: 600 px
        :align: center

    .. image:: img/coordinate_system/coordinate_system_esrf.svg
        :width: 600 px
        :align: center