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  1. Spatial Information Systems
  2. SIS-428

Allow derivative to be specified by the inverse projection instead than the forward one

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    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
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    Description

      The way NormalizedProjection API is designed, derivatives can be computed only by the direct transform. This was based on the assumption that forward projections are always simpler than inverse projection. But the Mollweide projection (SIS-426) breaks this assumption. With current API computing the derivative of the inverse Mollweide projection implies creating that matrices, inverting it, then inverting it back again to the original matrix. We need a way to return the first matrix directly instead.

      See inverseDerivate method in Mollweide class.

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          is caused by

          Sub-task - The sub-task of the issue SIS-426 Mollweide projection

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              Unassigned Unassigned
              desruisseaux Martin Desruisseaux
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                Created:
                Updated: