.. _sphx_glr_auto_examples_surface_analyses:

Surface Analysis Examples
------------------------------

Examples demonstrating operations and analyses done on brain surfaces.




.. raw:: html

    <div class="sphx-glr-thumbnails">

.. thumbnail-parent-div-open

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    <div class="sphx-glr-thumbcontainer" tooltip="Creating a flatmap from a folded cortical surface always introduces some distortion. This is similar to what happens when a map of the globe is flattened into a 2-D map like a Mercator projection. For the cortical surface the amount and type of distortion will depend on the curvature of the surface (i.e. whether it is on a gyrus or a sulcus) and on the distance to the nearest cut.">

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  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_tissots_indicatrix_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_tissots_indicatrix.py`

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      <div class="sphx-glr-thumbnail-title">Tissot's Indicatrix</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This will plot a geodesic path between two vertices on the cortical surface. This path is based on geodesic distances across the surface. The path starts at the given endpoint and selects the neighbor of that point in the surface map that is closest to the other endpoint. This process continues iteratilvely until the last vertex in the path is the endpoint you gave to it.">

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  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_geodesic_path_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_geodesic_path.py`

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      <div class="sphx-glr-thumbnail-title">Plotting Geodesic Paths</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This plots the distances (in mm) between a vertex or set of vertices and all other vertices on a surface. These two operations take the exact same amount of time to run.">

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  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_geodesic_distance_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_geodesic_distance.py`

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      <div class="sphx-glr-thumbnail-title">Plotting Geodesic Distances</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Creating a flatmap from a folded cortical surface always introduces some distortion. This is similar to what happens when a map of the globe is flattened into a 2-D map like a Mercator projection. For the cortical surface the amount and type of distortion will depend on the curvature of the surface (i.e. whether it is on a gyrus or a sulcus) and on the distance to the nearest cut.">

.. only:: html

  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_flatmap_distortion_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_flatmap_distortion.py`

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      <div class="sphx-glr-thumbnail-title">Flatmap Distortion</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Subsurfaces can be used for efficient operations on subsets of cortical surface">

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  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_subsurfaces_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_subsurfaces.py`

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      <div class="sphx-glr-thumbnail-title">Plot and Use Subsurface Tools</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In this example we show how to interpolate data from a sparse collection of points to all the points in the cortical surface.">

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  .. image:: /auto_examples/surface_analyses/images/thumb/sphx_glr_plot_interpolate_data_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_surface_analyses_plot_interpolate_data.py`

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      <div class="sphx-glr-thumbnail-title">Interpolate Data</div>
    </div>


.. thumbnail-parent-div-close

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    </div>


.. toctree::
   :hidden:

   /auto_examples/surface_analyses/plot_tissots_indicatrix
   /auto_examples/surface_analyses/plot_geodesic_path
   /auto_examples/surface_analyses/plot_geodesic_distance
   /auto_examples/surface_analyses/plot_flatmap_distortion
   /auto_examples/surface_analyses/plot_subsurfaces
   /auto_examples/surface_analyses/plot_interpolate_data