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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SIS-370) Improve CoordinateOperation WKT for axis changes and Molodensky parameters
Date Tue, 30 Apr 2019 14:11:00 GMT

     [ https://issues.apache.org/jira/browse/SIS-370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux updated SIS-370:
------------------------------------
    Description: 
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 most 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)


  was:
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)



> 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: 1.1
>
>
> 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 most 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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