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https://issues.apache.org/jira/browse/SIS-302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Desruisseaux resolved SIS-302.
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Resolution: Fixed
> Implement the spherical case of EllipsoidToCentric
> --------------------------------------------------
>
> Key: SIS-302
> URL: https://issues.apache.org/jira/browse/SIS-302
> Project: Spatial Information Systems
> Issue Type: Improvement
> Components: Referencing
> Affects Versions: 0.7, 0.8, 1.0, 1.1, 1.2, 1.3, 1.4
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Priority: Minor
> Fix For: 1.5
>
>
> The _"Ellipsoid to (geo)centric"_ transform currently target only Cartesian
> coordinate system. It should be easy to make it target spherical coordinate
> system too, since it is basically a matter of *not* performing the last calls
> to sin(λ) and sin(λ), and compute an arc-tangent for φ. More specifically we
> need to:
> * Add a {{SPHERICAL}} enum value to {{EllipsoidToCentric.TargetType}}.
> * Add a {{boolean}} field in {{EllipsoidToCentric}} for storing the target CS
> type in an efficient way.
> * Take the above-cited field in account in the following formulas:
> ** {{transform}} (forward conversion).
> ** {{inverseTransform}} (inverse conversion).
> ** {{transform}} : {{Matrix}} (derivative computation).
> We could also opportunistically implement the cylindrical case, but its
> interest is not obvious.
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