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<p>Hi Michael:</p>
<p>Enhance Compression Wavelet (ECW) is a proprietary compression
format. I would try exporting your image as a geotiff to see if
it is being read correctly and does not have internal write
protection on it.</p>
<p>Kirk Schmidt<br>
</p>
<div class="moz-cite-prefix">On 7/26/2023 2:02 AM, Michael Dufty via
QGIS-User wrote:<br>
</div>
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<p class="MsoNormal">I'm having issues trying to clip ecw images
to a mask layer.<o:p></o:p></p>
<p class="MsoNormal">Using raster-extraction-clip raster to mask
layer.<o:p></o:p></p>
<p class="MsoNormal">Default parameters.<o:p></o:p></p>
<p class="MsoNormal">The tool runs extremely quickly
(successfullyin 0.12 seconds), but produces a raster entirely
black (0,0,0 for all pixels). With the correct extent of the
mask layer.<o:p></o:p></p>
<p class="MsoNormal">If I tick the box to create an alpha output
band it produces an entirely transparent result.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Source and mask layers both in EPSG 28350 <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyone else having this issue? I cannot
see any bug reports.
<o:p></o:p></p>
<p class="MsoNormal">Tried in 328.8, 3.28.9, 3.32.0 and 3.32.1
with same result.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Seems to work fine if input raster is a
tif.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<br>
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<pre class="moz-signature" cols="72">--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email: <a class="moz-txt-link-abbreviated" href="mailto:kirk@nortekresources.com">kirk@nortekresources.com</a>
Web: <a class="moz-txt-link-abbreviated" href="http://www.nortekresources.com">www.nortekresources.com</a></pre>
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