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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SIS-249) Transverse Mercator (EPSG:9807)
Date Wed, 22 Jul 2015 07:58:04 GMT

     [ https://issues.apache.org/jira/browse/SIS-249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux updated SIS-249:
------------------------------------
    Description: 
(Note: in the EPSG dataset, Gauss-Kruger and Gauss-Boaga projections are considered to be
the same than Transverse Mercator.)

We could port most of the Transverse Mercator projection in Geotk (after IP review), but the
formulas changed. The formulas used by Geotk were derived from USGS, while the formulas used
by EPSG (called "JHS") are accurate over a wider range of longitudes.

Consequently, we should rewrite the Transverse Mercator projection from the new EPSG formulas.

See §1.3.5.1 in IOGP Publication 373-7-2 – Geomatics Guidance Note number 7, part 2 –
April 2015.

  was:
(Note: in the EPSG dataset, Gauss-Kruger and Gauss-Boaga projections are considered to be
the same than Transverse Mercator.)

We could port most of the Transverse Mercator projection in Geotk (after IP review), but the
formulas changed. The formulas used by Geotk were derived from USGS, while the formulas used
by EPSG (called "JHS") are accurate over a wider range of longitudes.

Consequently, we should rewrite the Transverse Mercator projection from the new EPSG formulas.


> Transverse Mercator (EPSG:9807)
> -------------------------------
>
>                 Key: SIS-249
>                 URL: https://issues.apache.org/jira/browse/SIS-249
>             Project: Spatial Information Systems
>          Issue Type: Sub-task
>          Components: Referencing
>            Reporter: Martin Desruisseaux
>            Assignee: Martin Desruisseaux
>
> (Note: in the EPSG dataset, Gauss-Kruger and Gauss-Boaga projections are considered to
be the same than Transverse Mercator.)
> We could port most of the Transverse Mercator projection in Geotk (after IP review),
but the formulas changed. The formulas used by Geotk were derived from USGS, while the formulas
used by EPSG (called "JHS") are accurate over a wider range of longitudes.
> Consequently, we should rewrite the Transverse Mercator projection from the new EPSG
formulas.
> See §1.3.5.1 in IOGP Publication 373-7-2 – Geomatics Guidance Note number 7, part
2 – April 2015.



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