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<p class="MsoNormal"><span lang="DA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Alessandro,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">It sounds like this is a good candidate for a new projection in PROJ. Unfortunately I can’t access the paper so I can’t comment on the details. How is the ground
track oblique cassini different from the landsat equivalent?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">If you want to add the projection to PROJ I suggest you add a pull request with your implementation. Since you already have written the code this shouldn’t be
a big task. Here’s a previous pull request to get an idea of where to start: <a href="https://github.com/OSGeo/PROJ/pull/1133">
https://github.com/OSGeo/PROJ/pull/1133</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">/Kristian<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> PROJ <proj-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Alessandro Burini<br>
<b>Sent:</b> 16. februar 2020 17:07<br>
<b>To:</b> Jeff McKenna <jmckenna@gatewaygeomatics.com>; proj@lists.osgeo.org<br>
<b>Subject:</b> Re: [PROJ] Adding new projection to Proj4<o:p></o:p></span></p>
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<p class="MsoNormal">Dear Jeff, <o:p></o:p></p>
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<p class="MsoNormal">I confirm Martin's interpretation. The Ground Track Oblique Cassini is a new projection method which we would like to have it included in proj4, as done for the landsat projection (<a href="https://proj.org/operations/projections/lsat.html">https://proj.org/operations/projections/lsat.html</a>).
Is this something that can be done?<o:p></o:p></p>
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<p class="MsoNormal">Alessandro <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#575757">Sent from my Samsung Galaxy smartphone.<o:p></o:p></span></p>
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<p class="MsoNormal">-------- Original message --------<o:p></o:p></p>
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<p class="MsoNormal">From: Jeff McKenna <<a href="mailto:jmckenna@gatewaygeomatics.com">jmckenna@gatewaygeomatics.com</a>>
<o:p></o:p></p>
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<p class="MsoNormal">Date: 16/02/2020 15:50 (GMT+01:00) <o:p></o:p></p>
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<p class="MsoNormal">To: <a href="mailto:proj@lists.osgeo.org">proj@lists.osgeo.org</a>
<o:p></o:p></p>
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<p class="MsoNormal">Subject: Re: [PROJ] Adding new projection to Proj4 <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">ok thanks for clarifying Martin. -jeff<br>
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<br>
On 2020-02-16 9:52 a.m., Martin Desruisseaux wrote:<br>
> I think Alessandro was proposing to add a new "projection method" (i.e. <br>
> another set of mathematical formulas for doing the projection). This is <br>
> a different work than assigning an EPSG code, which is more about <br>
> setting parameter values to use with pre-existing formulas. If this is <br>
> the case, then Alessandro's proposal and EPSG change request would be <br>
> orthogonal tasks.<br>
> <br>
> Martin<br>
> <br>
> Le 16/02/2020 à 13:41, Jeff McKenna a écrit :<br>
> <br>
>> Hi Alessandro,<br>
>><br>
>> A new projection can be added into the EPSG registry by filing a <br>
>> change request at: <a href="http://www.epsg.org/EPSGDataset/Makechangerequest.aspx">
http://www.epsg.org/EPSGDataset/Makechangerequest.aspx</a><br>
>><br>
>> I have went through that process several times now, to add a new <br>
>> projection into EPSG, that is then automatically leveraged by software <br>
>> projects, such as PROJ. Of course it takes time, first for the EPSG <br>
>> committee to review your request, and then also for the new projection <br>
>> to propagate to all software projects.<br>
>><br>
>> -jeff<br>
> <br>
> <br>
> _______________________________________________<br>
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<br>
<br>
-- <br>
Jeff McKenna<br>
MapServer Consulting and Training Services<br>
<a href="https://gatewaygeomatics.com/">https://gatewaygeomatics.com/</a><br>
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