<div dir="ltr">Hi Even,<div><br></div><div>I thought over your answer again during the weekend. You give the right parameters to get a PNG image format; which is fine.</div><div><br></div><div>However, I do need to offer a GIF format support in order to be compliant to the "<i>DGIWG WMS profile"</i> (OGC 09-102r3).<br>Indeed, requirement #6 says :</div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><i>A DGIWG WMS server shall support the following raster formats for the GetMap operation </i></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><ul><li><i>image/png, </i></li><li><i>image/gif, </i></li><li><i>image/jpeg</i></li></ul></div></blockquote>Do you have any other advice / ideas?<div>Sincerely</div><div>Philippe<br><div><br></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 8, 2023 at 4:02 PM Philippe Ghesquiere <<a href="mailto:philippe.ghesquiere@airbus.com">philippe.ghesquiere@airbus.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Thanks Even & Seth,<div><br></div><div>I will give it a try</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 8, 2023 at 3:02 PM Seth G <<a href="mailto:sethg@geographika.co.uk" target="_blank">sethg@geographika.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><u></u><div><div>I think `WITH_GIF` is only used to read in GIF images (for symbols etc.)?<br></div><div><br></div><div>As Even wrote GDAL/GIF doesn't seem to work as an OUTPUTFORMAT. I get:<br></div><div><br></div><div><span style="color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;white-space:normal;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-family:monospace"><span style="font-size:13px">msDrawMap(): Image handling error. Failed to draw layer named 'countries'. msOGRFileNextShape(): OGR error. OGR GetNextFeature() error'd. Check logs</span></span></span><br></div><div><span style="color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;white-space:normal;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-family:monospace"><span style="font-size:13px"></span></span></span><br></div><div><br></div><div id="m_762017645438115707m_-9209968738697729874sig62266145"><div>--<br></div><div>web:<a href="https://geographika.net" target="_blank">https://geographika.net</a> & <a href="https://mapserverstudio.net" target="_blank">https://mapserverstudio.net</a><br></div><div>twitter: @geographika<br></div></div><div><br></div><div>On Fri, Sep 8, 2023, at 2:43 PM, Even Rouault wrote:<br></div><blockquote type="cite" id="m_762017645438115707m_-9209968738697729874qt"><p>Philippe,<br></p><div>Le 08/09/2023 à 14:16, Philippe
Ghesquiere via MapServer-dev a écrit :<br></div><blockquote type="cite"><div dir="ltr"><div>Hi all,<br></div><div>I am a little bit confused with GIF support for WMS/WMTS
services.<br></div><div>In several parts of the documentation, it is mentioned that
GIF support is discarded with the end of the "GD library"
support.<br></div><div><br></div><div>I noticed the compilation option in CMakelists.txt :<br></div><div>option(WITH_GIF "Enable GIF support (for PIXMAP loading)"
ON)<br></div><div>I do not understand the "for PIXMAP loading" comment.<br></div><div><br></div><div>Anyway, our mapserver does not server WMS/WMTS tiles in GIF
format.<br></div><div><br></div><div>So here are my few questions :<br></div><div><ul><li>is GIF support enabled by default for WMS/WMTS services
?<br></li></ul></div></div></blockquote><div>no<br></div><blockquote type="cite"><div dir="ltr"><div><ul><li>do I need to add the option : -DWITH_GIF=ON for cmake
configuration ?<br></li></ul></div></div></blockquote><div>only to load raster symbols in GIF format<br></div><blockquote type="cite"><div dir="ltr"><div><ul><li><div>do I need to add a specific mapserver configuration,
like :<br></div><div> OUTPUTFORMAT<br></div><div> NAME "GIF"<br></div><div> DRIVER GDAL/GIF<br></div><div> MIMETYPE "image/GIF"<br></div><div> IMAGEMODE RGB<br></div><div> EXTENSION "gif"<br></div><div> END<br></div></li></ul></div></div></blockquote><p>I don't think that will work. The GDAL GIF driver already expects
paletted data, not RGB. And I don't think switching IMAGEMODE to
PC256 would work since that support has effectively gone.<br></p><p>I believe the only option to get paletted data is to use PNG8
with the AGG/PNG8 driver and MIMETYPE="image/png; mode=8bit"<br></p><p>Even<br></p><p><br></p><blockquote type="cite"><div dir="ltr"><div><div>Thanks for your help and advices<br></div></div><div>Philippe<br></div><div><br></div></div><div><span>The information in this e-mail is
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