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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I concur that it is desirable to be able to recognize this projection in which ever “Well Known” Text is appears. To paraphrase Douglas Adams, “</span><span style='font-size:10.5pt;font-family:"Georgia","serif";color:#181818;background:white'>this is obviously some strange use of the term<span class=apple-converted-space> </span><em><span style='font-family:"Georgia","serif"'>well-known</span></em><span class=apple-converted-space> </span>that I wasn't previously aware of.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Georgia","serif";color:#181818;background:white'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Georgia","serif";color:#181818;background:white'>msr</span><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'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gdal-dev-bounces@lists.osgeo.org [mailto:gdal-dev-bounces@lists.osgeo.org] <b>On Behalf Of </b>Frank Warmerdam<br><b>Sent:</b> Thursday, August 29, 2013 2:32 PM<br><b>To:</b> Stefano Iacovella<br><b>Cc:</b> gdal-dev<br><b>Subject:</b> Re: [gdal-dev] Patch for GDAL Web Mercator Issue / trac 3962<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Folks,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have no problem with EPSG code 3857 as a PCS in GeoTIFF files. It is widely accepted that any EPSG PCS is acceptable there.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>What is less clear to me is the most appropriate formulation of Web Mercator in WKT. Potentially, we could move to encoding semi_major and semi_minor in the projection parameters as overrides, and then translate to the ESRI format and back in our morphing code.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Mike, if we do incorporate your patch, I think we should also consider ways of recognising some of the other variations. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Best regards,<o:p></o:p></p></div><div><p class=MsoNormal>Frank<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Aug 29, 2013 at 2:05 PM, Stefano Iacovella <<a href="mailto:stefano.iacovella@gmail.com" target="_blank">stefano.iacovella@gmail.com</a>> wrote:<o:p></o:p></p><div><div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>2013/8/29 Even Rouault <<a href="mailto:even.rouault@mines-paris.org" target="_blank">even.rouault@mines-paris.org</a>><o:p></o:p></p><div><p class=MsoNormal>My main question is : how sure are we about the projection name<br>"Mercator_Auxiliary_Sphere" to be the appropriate one for "standard" WKT ? Is<br>there some reference from that ? The fact that ESRI uses it doesn't make it<br>necesserarily a standard (although it can serve as a base if there's no<br>alternative).<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal>According to <a href="http://epsg-registry.org/" target="_blank">http://epsg-registry.org/</a>, not an ISO standard but quite a de facto standard, EPSG:3857 is "WGS 84 / Pseudo-Mercator "<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Kind Regards,<o:p></o:p></p></div><div><p class=MsoNormal>Stefano<br clear=all><o:p></o:p></p></div><div><div><p class=MsoNormal>---------------------------------------------------<br>41.95581N 12.52854E<br><br><br><a href="http://www.linkedin.com/in/stefanoiacovella" target="_blank">http://www.linkedin.com/in/stefanoiacovella</a><br><br><a href="http://twitter.com/#!/Iacovellas" target="_blank">http://twitter.com/#!/Iacovellas</a><o:p></o:p></p></div></div></div><p class=MsoNormal><br>_______________________________________________<br>gdal-dev mailing list<br><a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <br>---------------------------------------+--------------------------------------<br>I set the clouds in motion - turn up | Frank Warmerdam, <a href="mailto:warmerdam@pobox.com" target="_blank">warmerdam@pobox.com</a><br>light and sound - activate the windows | <a href="http://pobox.com/~warmerdam" target="_blank">http://pobox.com/~warmerdam</a><br>and watch the world go round - Rush | Geospatial Software Developer<o:p></o:p></p></div></div></body></html>