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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi Richard,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Trialled your suggestion and others contained in the gis.stackexchange.com link. Always get the same result where if any of the three bands contain a 0, it’s removed. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Maybe I’ve got the syntax slightly wrong?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Original <o:p></o:p></b></p><p class=MsoNormal>gdalwarp -overwrite -s_srs EPSG:28351 ""C:/Brett.tif" <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Trialled variations<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>gdalwarp -overwrite -srcnodata "0,0,0" -dstnodata "0,0,0" -s_srs EPSG:28351 -of GTiff "C:/Brett.tif" "C:/Brett2.tif"<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>gdalwarp -overwrite -srcnodata "0,0,0" -dstnodata "0,0,0" -of GTiff "C:/Brett.tif" "C:/Brett2.tif"<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>gdalwarp -overwrite <span class=comment-copy><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#242729'>-srcnodata None -dstnodata None -dstalpha </span></span>-s_srs EPSG:28351 -of GTiff "C:/Brett.tif" "C:/Brett2.tif"<o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Brett<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'> Richard McDonnell [mailto:richard.mcdonnell@opw.ie] <br><b>Sent:</b> Tuesday, 15 August 2017 11:17 PM<br><b>To:</b> Brett Adams; qgis-user@lists.osgeo.org<br><b>Subject:</b> Re: [Qgis-user] background transparency<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi,<br>Just looking into this, but you might try whats outlined here<br><br><a href="https://gis.stackexchange.com/questions/166699/replacing-rgb-value-0-0-0-with-nodata-nodata-nodata-in-gdal">https://gis.stackexchange.com/questions/166699/replacing-rgb-value-0-0-0-with-nodata-nodata-nodata-in-gdal</a><br><br>Warp, can be found under <b>Raster</b>, <b>Projections</b>,<b> Warp </b>fill in the fields just as you done before for the Translate, with the exception of the nodata field.<br><br>At the bottom where you see the GDAL script being constructed, you should also see a Pencil or Pen icon, select this, it will allow you to directly edit the script.<br>You should paste <b><i>-srcnodata "0,0,0" -dstnodata "0,0,0" </i></b>just after<b><i> -overwrite </i></b>so as you have something like below<b><i>.<br><br></i></b>gdalwarp -overwrite -srcnodata "0,0,0" -dstnodata "0,0,0" -of GTiff raster_in.tif raster_out.tif<br><br>Hope this helps.<br><br>Regards,<br><br>Richard.<br><br><br><br><o:p></o:p></p><div><p class=MsoNormal>On 15/08/2017 13:42, Brett Adams wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='color:#1F497D'>Richard,</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Thanks for your response. Gave this a run but it’s not quite working.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Looks like the problem stems from the colour being defined across three bands, with black defined by 0,0,0</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-AU'><br><br></span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>When “No data = 0” this clears all colours where band 1 = 0. Which includes a lot more colours than just black.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Tried entering a few different formats to cover the all 3 bands but the second 2 are always ignored.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Any thoughts as to how I get 3 bands recognised?</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Brett</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'> Qgis-user [<a href="mailto:qgis-user-bounces@lists.osgeo.org">mailto:qgis-user-bounces@lists.osgeo.org</a>] <b>On Behalf Of </b>Richard McDonnell<br><b>Sent:</b> Monday, 14 August 2017 10:16 PM<br><b>To:</b> <a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a><br><b>Subject:</b> Re: [Qgis-user] background transparency</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Brett, <br>Apologies, ive just realised your version of QGIS may not have the processing toolbox.<br>You may also do this by going to <b>RASTER</b>, <b>Conversion </b>and selecting<b> Translate </b>Its the very same tool just a different interface<br>Regards,<br><br>Richard<o:p></o:p></p><div><p class=MsoNormal>On 14/08/2017 15:04, Richard McDonnell wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal style='margin-bottom:12.0pt'>Hi Brett<br>You can indeed, just use the Processing toolbox, just type Translate into the search box and select the Translate Tool under GDAL.<br>The values you specified as transparent, can be specified under the Nodata Value<br>You can also do this as part of a batch if you have a number of files, you wish to do this for.<br><br>Hope this helps,<br><br>Richard.<o:p></o:p></p><div><p class=MsoNormal>On 14/08/2017 14:07, Brett Adams wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Hi Folks,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I have a geotiff that contains a black ground in areas where there is no data. The black background is made transparent within QGIS via “Layer Properties – Transparency”<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Can I export a new Geotiff with the black background removed?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I’m running 2.6.1 On Windows-7. Yes, I know it’s an old version but I’ve had no reason to update. So far…<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><b><span style='color:#C00000;mso-fareast-language:EN-AU'>Brett Adams</span></b><o:p></o:p></p><p class=MsoNormal><b><span style='color:#C00000;mso-fareast-language:EN-AU'>Spinifex-GPX</span></b><o:p></o:p></p><p class=MsoNormal><b><span style='color:#C00000;mso-fareast-language:EN-AU'>0438 861 974</span></b><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt'><br><br><br><br></span><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>Qgis-user mailing list<o:p></o:p></pre><pre><a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><o:p></o:p></pre><pre>List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><o:p></o:p></pre><pre>Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt'> </span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt'>-- <br><b><u>Richard McDonnell</u></b><br></span><b><span style='font-size:7.5pt'>GIS Specialist PgD GIS AssocSCSI</span></b><span style='font-size:12.0pt'><br></span><b><span style='font-size:10.0pt'>OPW FRM Data Management</span></b><span style='font-size:12.0pt'><br></span><b><span style='font-size:10.0pt'>52 Stephens Green, Dublin 2.</span></b><span style='font-size:12.0pt'><br></span><span style='font-size:7.5pt'>TEL: 01 6476543</span><o:p></o:p></p></div><p><a href="http://www.opw.ie/"><span style='text-decoration:none'><img border=0 width=405 height=225 id="_x0000_i1025" src="http://www.opw.ie/en/media/opw-logo-december-2016.gif"></span></a><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt'><br><br>Email Disclaimer: <a href="http://www.opw.ie/en/disclaimer/">http://www.opw.ie/en/disclaimer/</a> <br><br><br><br></span><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>Qgis-user mailing list<o:p></o:p></pre><pre><a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><o:p></o:p></pre><pre>List info: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><o:p></o:p></pre><pre>Unsubscribe: <a href="https://lists.osgeo.org/mailman/listinfo/qgis-user">https://lists.osgeo.org/mailman/listinfo/qgis-user</a><o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt'> </span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt'>-- <br><b><u>Richard McDonnell</u></b><br></span><b><span style='font-size:7.5pt'>GIS Specialist PgD GIS AssocSCSI</span></b><span style='font-size:12.0pt'><br></span><b><span style='font-size:10.0pt'>OPW FRM Data Management</span></b><span style='font-size:12.0pt'><br></span><b><span style='font-size:10.0pt'>52 Stephens Green, Dublin 2.</span></b><span style='font-size:12.0pt'><br></span><span style='font-size:7.5pt'>TEL: 01 6476543</span><o:p></o:p></p></div></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>-- <br><b><u>Richard McDonnell</u></b><br></span><b><span style='font-size:7.5pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>GIS Specialist PgD GIS AssocSCSI</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><br></span><b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>OPW FRM Data Management</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><br></span><b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>52 Stephens Green, Dublin 2.</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><br></span><span style='font-size:7.5pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>TEL: 01 6476543</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><o:p></o:p></span></p></div></div></body></html>