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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m trying to convert coordinates from what seems to be a custom projection system in Aruba, without much luck.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In their drawings, they have data around 3000, 18000. Whatever existing projection system I use (EPSG 24819, EPSG 32619), I end up at a completely different location.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For example:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">echo 2936 18088 | cs2cs +proj=utm +zone=19 +ellps=intl +towgs84=-216.408,279.243,-203.231,-8.56912,40.8756,-12.5593,15.8909 +units=m +to +proj=webmerc +datum=WGS84<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-8178296.58 17850.76 22.52<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">echo 2936 18088 | cs2cs +proj=utm +ellps=intl +towgs84=-216.408,279.243,-203.231,-8.56912,40.8756,-12.5593,15.8909 +units=m +to +proj=webmerc +datum=WGS84<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-830835.88 16729.91 101.08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This is way outside the expected area. In 3857, the data should be somewhere between<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-7800000, 1417000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-7777000, 1393000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I do have the attached “.gtf” files, but I’m unsure how to apply this in proj. Is the above string correct? What am I missing?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any help would be greatly appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jelmer Baas<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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