giohappy wrote
> Because Qgis geometries do not manage z data.

Perhaps,  but that would allow to use these values ​​in Python without using
the other modules, see  visualizing 3D data (Z values) or data with z
attribute: a solution
<http://osgeo-org.1560.n6.nabble.com/visualizing-3D-data-Z-values-or-data-with-z-attribute-a-solution-td5005360.html>
  



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