<div dir="ltr"><div style>Ok, I remember things better now: older versions of ecw do not support transparency. If you use tif it will work in mapguide/AIMS, but your filesizes will explode. </div><div style>Actually we solved this problem by not using transparent ecw files but by overlaying these transparent tiffs with with other images (of a lower resolution) we had in the background and exporting that result as ecw.</div>
<div style><br></div><div style>Johan</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Feb 5, 2013 at 12:37 PM, Jérôme DUCKERS <span dir="ltr"><<a href="mailto:jerome.duckers@gmail.com" target="_blank">jerome.duckers@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi thanks Johan,<br><br>I'm working too with AIMS, Gdal was a test.<br><br>I have tried your command, but for the moment, the result is the same that i have for the moment, a cloud.<br>
What soft are you using for conversion ?<br>
We are using Erdas Imagine.<br><br>I took a tif, then i generate an Ecw (with erdas imagine) <br>I use your command.<br>And finaly, i regenerate my Ecw based on my new tif.<br><br>With Autocad Map3d, i see that my tiff is right (i can do transparency on white color), but when my tiff is converted,<br>
i apply the transparency on white, and i see a cloud near my image<br><br>it's very difficult :'(<div class="HOEnZb"><div class="h5"><br><span style="line-height:15px;font-size:9pt;background-color:rgb(251,252,253);font-family:monospace,fixed"></span><br>
<br><div class="gmail_quote">2013/2/5 Zac Spitzer <span dir="ltr"><<a href="mailto:zac.spitzer@gmail.com" target="_blank">zac.spitzer@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">if you need some GDAL improvements, you could always engage Trevor to make them<br></div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote">On Tue, Feb 5, 2013 at 9:57 AM, Johan Van de Wauw <span dir="ltr"><<a href="mailto:johan.vandewauw@gmail.com" target="_blank">johan.vandewauw@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I've not used the GDAL provider myself, but using AIMS raster driver the only way I found to make ecw transparent was adding a alpha layer. I did this using the gdal command line utility "nearblack" with the setalpha option:<div>
nearblack <span style="line-height:15px;font-size:9pt;background-color:rgb(251,252,253);font-family:monospace,fixed">-setalpha -o out.tif in.ecw </span></div><div><font color="#000000" face="monospace, fixed"><span style="font-size:12px;line-height:15px">And afterwards converting the output to ecw again (exporting to ecw was not supported by nearblack).</span></font></div>
<span><font color="#888888">
<div><font color="#000000" face="monospace, fixed"><span style="font-size:12px;line-height:15px"><br></span></font></div><div><font color="#000000" face="monospace, fixed"><span style="font-size:12px;line-height:15px">Johan<br>
</span></font><div><br></div></div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Feb 4, 2013 at 5:27 PM, StuartSteel <span dir="ltr"><<a href="mailto:stuart.steel@atkinsglobal.com" target="_blank">stuart.steel@atkinsglobal.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Bump.<br>
<br>
I cannot believe that Duck and myself are the only two people who require<br>
nodata transparency using the GDAL raster provider?<br>
<br>
Can anyone shed some light on this, please?<br>
<br>
<br>
<br>
--<br>
View this message in context: <a href="http://osgeo-org.1560.n6.nabble.com/raster-ECW-transparency-tp5029485p5032030.html" target="_blank">http://osgeo-org.1560.n6.nabble.com/raster-ECW-transparency-tp5029485p5032030.html</a><br>
<div><div>Sent from the MapGuide Users mailing list archive at Nabble.com.<br>
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<br></blockquote></div><br><br clear="all"><br></div></div><span><font color="#888888">-- <br>Zac Spitzer<br>Solution Architect / Director<br>Ennoble Consultancy Australia<br><a href="tel:%2B61%20405%20847%20168" value="+61405847168" target="_blank">+61 405 847 168</a><br>
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