<div dir="ltr">Hi Richard,<div>when investigating on an issue very similar to the ones you have reported, I have discovered that the problem was in the color map.</div><div>You may take a look on the details of my original report:</div><div><a href="https://lists.osgeo.org/pipermail/gdal-dev/2016-November/045589.html" target="_blank">https://lists.osgeo.org/<wbr>pipermail/gdal-dev/2016-<wbr>November/045589.html</a>.<br></div><div><br></div><div>The outcome of that problem was that the colors of the geotiff with palette + overviews were changing when zooming out from native to overview.</div><div>So I think it could be related since, at the end, the transparent entry is a color itself.</div><div><br></div><div>Daniele </div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 8, 2018 at 4:17 PM, Richard 🌍 Duivenvoorde <span dir="ltr"><<a href="mailto:richard@duif.net" target="_blank">richard@duif.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 08-03-18 15:55, Even Rouault wrote:<br>
> On jeudi 8 mars 2018 15:32:09 CET Daniele Romagnoli wrote:<br>
</span><span class="">>> I'm resurrecting this old post since I think we have (GeoServer) been hit<br>
>> by that problem again (although I'm not 100% sure about that).<br>
><br>
> <a href="http://osgeo-org.1560.x6.nabble.com/Geotiff-pyramids-non-transparant-while-o" rel="noreferrer" target="_blank">http://osgeo-org.1560.x6.<wbr>nabble.com/Geotiff-pyramids-<wbr>non-transparant-while-o</a><br>
>> riginal-is-transparent-<wbr>td5357343.html<br>
<br>
>> Do you know if there is any plan to fix <a href="https://trac.osgeo.org/gdal/ticket/2213" rel="noreferrer" target="_blank">https://trac.osgeo.org/gdal/<wbr>ticket/2213</a>?<br>
><br>
</span><span class="">> there was no "plan", but seing this is a 10-year long lasting issue made<br>
> me sad, so I've just pushed a fix... As suggested in this discussion<br>
> thread, I've used 257 as factor for multiplication/division hopefully<br>
> all over the relevant places.<br>
<br>
</span>Thanks Even!<br>
<br>
Looking at the patch, I understand it will fix a color map change, but<br>
(my) original Geoserver issue [0] was about the transparency in<br>
(apparently) the generated overview images.<br>
<br>
Is that relevant in this case? Or is this only about actual colors?<br>
<br>
Regards,<br>
<br>
Richard Duivenvoorde<br>
<br>
[0]<br>
<a href="http://osgeo-org.1560.x6.nabble.com/Geotiff-pyramids-non-transparant-while-original-is-transparent-td5357343.html" rel="noreferrer" target="_blank">http://osgeo-org.1560.x6.<wbr>nabble.com/Geotiff-pyramids-<wbr>non-transparant-while-<wbr>original-is-transparent-<wbr>td5357343.html</a><br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr">Regards,</div><div dir="ltr">Daniele Romagnoli</div><div dir="ltr">==</div><div dir="ltr">GeoServer Professional Services from the experts! Visit <a href="http://goo.gl/it488V" target="_blank">http://goo.gl/it488V</a> for more information.</div><div dir="ltr">==</div><div dir="ltr"><br></div><div dir="ltr">Ing. Daniele Romagnoli</div><div dir="ltr">Senior Software Engineer</div><div dir="ltr"><br></div><div dir="ltr">GeoSolutions S.A.S.</div><div dir="ltr">Via di Montramito 3/A</div><div dir="ltr">55054 Massarosa (LU)</div><div dir="ltr">Italy</div><div dir="ltr">phone: +39 0584 962313</div><div dir="ltr">fax: +39 0584 1660272</div><div dir="ltr"><br></div><div dir="ltr"><a href="http://www.geo-solutions.it" target="_blank">http://www.geo-solutions.it</a></div><div dir="ltr"><a href="http://twitter.com/geosolutions_it" target="_blank">http://twitter.com/geosolutions_it</a></div><div dir="ltr"><br></div><div dir="ltr">-------------------------------------------------------</div><div dir="ltr">AVVERTENZE AI SENSI DEL D.Lgs. 196/2003</div><div dir="ltr">Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.</div><div dir="ltr"> </div><div dir="ltr">The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.</div><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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