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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SIS-408) Add SpecializableTransform
Date Mon, 05 Mar 2018 22:15:00 GMT

     [ https://issues.apache.org/jira/browse/SIS-408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux resolved SIS-408.
-------------------------------------
    Resolution: Fixed

> Add SpecializableTransform
> --------------------------
>
>                 Key: SIS-408
>                 URL: https://issues.apache.org/jira/browse/SIS-408
>             Project: Spatial Information Systems
>          Issue Type: New Feature
>          Components: Referencing
>    Affects Versions: 0.8
>            Reporter: Martin Desruisseaux
>            Assignee: Martin Desruisseaux
>            Priority: Major
>             Fix For: 1.0
>
>
> Sometime, there is a datum shift grid covering a wide area and smaller datum shift grids
covering smaller area at finer resolution. Current SIS version does not handle those smaller
grids (called _"specialization"_ here). We need a {{MathTransform}} implementation which delegate
to another transform when the coordinate is found to be in a given area.
> This is useful not only for datum shift grids, but also for localization grids (e.g.
in GeoTIFF files) when pixel coordinates of control points in the last rows or columns are
not spaced in the same way than the first points. This happen in Sentinel 1 images for instance.



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