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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SIS-370) Improve CoordinateOperation WKT for axis changes and Molodensky parameters
Date Fri, 27 Oct 2017 12:11:02 GMT
Martin Desruisseaux created SIS-370:
---------------------------------------

             Summary: Improve CoordinateOperation WKT for axis changes and Molodensky parameters
                 Key: SIS-370
                 URL: https://issues.apache.org/jira/browse/SIS-370
             Project: Spatial Information Systems
          Issue Type: Improvement
          Components: Referencing
    Affects Versions: 0.7, 0.8
            Reporter: Martin Desruisseaux
            Assignee: Martin Desruisseaux
            Priority: Minor
             Fix For: 1.0


The Well Known Text (WKT) formatting of {{CoordinateOperation}} objects have the following
shortcomings:

In the formatting of Molodensky Parameters, _Semi-major axis length difference_ and _Flattening
difference_ parameters are wrongly set to NaN. Note that this issue happen only for {{CoordinateOperation}}
WKT, not for {{MathTransform}} WKT.

Operation steps inserted for changing axis order are shown as affine transform, which is difficult
to read for more users. The formatter should detect automatically when a matrix is square,
of size 3×3 or 4×4 and having 1 value on anti-diagonal (except last row) and show instead
one of the following operations:

* EPSG::15498 — axis order change (2D)
* EPSG::15499 — axis order change (geographic3D horizontal)




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