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<p><font face="Courier New, Courier, monospace" size="-1">Dear list,</font></p>
<p><font face="Courier New, Courier, monospace" size="-1">Currently
we are working with 4 band tifs, first 3 bands as normal RBG and
the 4th as IR. On performing a warp operation from and to a VRT,
GDAL seems considering the 4th band as alpha, resulting in full
black pixels if 4th band value =0.</font></p>
<p><font face="Courier New, Courier, monospace" size="-1">Some
attempts were made to solve this issue, so far without success:</font></p>
<p><font face="Courier New, Courier, monospace" size="-1">- Using
the warp creation options PHOTOMETRIC=RGB and ALPHA=NO</font><br>
</p>
<p><font face="Courier New, Courier, monospace" size="-1">- Manually
editing the source VRT and replace Alpha color interpretation to
Undefined</font></p>
<p><font face="Courier New, Courier, monospace" size="-1">Does
anyone have more suggestions?</font></p>
<font face="Courier New, Courier, monospace" size="-1">Thank you</font><br>
<pre class="moz-signature" cols="72">--
Regards,
Fernando Ribeiro
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Fernando Ribeiro
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