[jira] [Updated] (SIS-542) Mercator auxiliary sphere

["Martin Desruisseaux (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SIS-542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Desruisseaux updated SIS-542:
------------------------------------
    Fix Version/s: 1.2

> Mercator auxiliary sphere
> -------------------------
>
>                 Key: SIS-542
>                 URL: https://issues.apache.org/jira/browse/SIS-542
>             Project: Spatial Information Systems
>          Issue Type: Sub-task
>          Components: Referencing
>            Reporter: Martin Desruisseaux
>            Assignee: Martin Desruisseaux
>            Priority: Major
>             Fix For: 1.2
>
>
> This operation method is defined by ESRI:
> https://desktop.arcgis.com/en/arcmap/latest/map/projections/mercator.htm
> Of particular interest the meaning of "Auxiliary Sphere Type" parameter:
> * 0 = use semimajor axis or radius of the geographic coordinate system
> * 1 = use semiminor axis or radius
> * 2 = calculate and use authalic radius
> * 3 = use authalic radius and convert geodetic latitudes to authalic latitudes
> Types 0 to 2 are easy, type 3 is more tricky and may not be supported in the first version. Type 0 is equivalent to "Popular Visualisation Pseudo Mercator" projection method.



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