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Projections
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Kalpa supports two types of projections: 

3D Cartesian Projection
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- This projection allows you to visualize data on a flat Cartesian plane.
- Surface raster and vector data are placed at a reference plane set 6,371,000 meters (the approximate radius of the Earth) from the Earth's center.
- This setup is particularly useful for analyzing global and regional datasets, especially when working with volumetric rasters.

.. image:: _static/images/cartesian_projection_3d.png
   :alt: 3D Cartesian Projection
   :align: center


3D Spherical Projection
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- This option lets you visualize raster and vector data in a spherical projection.
- It is ideal for datasets with a global extent, enabling a more natural representation of Earth's surface curvature.

.. image:: _static/images/spherical_projection_3d.png
   :alt: 3D Spherical Projection
   :align: center