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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Olli,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks for reporting this. You assume correct. The issue has already been reported and mostly fixed. See the discussion
here: <a href="https://github.com/OSGeo/proj.4/issues/783">https://github.com/OSGeo/proj.4/issues/783</a>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">This should be fixed in RC3.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">/Kristian<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Fra:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> proj-bounces@lists.maptools.org [mailto:proj-bounces@lists.maptools.org]
<b>På vegne af </b>Olli Räisä<br>
<b>Sendt:</b> 12. februar 2018 09:36<br>
<b>Til:</b> proj@lists.maptools.org<br>
<b>Emne:</b> [Proj] Cct, proj_create_crs_to_crs and towgs84 parameters<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Proj-5.0.0RC2 cct outputs appear to differ from cs2cs outputs, when a coordinate reference system has non-zero towgs84 parameters.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">An example:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">bin\cs2cs +init=epsg:2393 +to +init=epsg:3879<o:p></o:p></p>
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<p class="MsoNormal">3500000 6650000 0<o:p></o:p></p>
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<p class="MsoNormal">25611546.42 6651551.63 25.30<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">bin\cct -t0 +proj=pipeline +step +init=epsg:2393 +inv +step +init=epsg:3879<o:p></o:p></p>
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<p class="MsoNormal">3500000 6650000 0<o:p></o:p></p>
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<p class="MsoNormal">25611608.8193 6651462.4308 340.2153 0.0000 <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Looking at proj_create_crs_to_crs function code, I assumed that these commands produce the same results (within some tolerance).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal">Olli Räisä<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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