<div dir="ltr"><div class="gmail_default" style="font-family:arial,sans-serif">Carsten,</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">The gdal_rasterize command allows you to "burn in" polygons from an OGR supported datasource into an existing raster. If your raster is a 3 band RGB file, you could use --burn 100 150 200 to burn in the RGB value (100,150,200). This will only work if the raster format you are using supports update-in-place.</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">You would have to regenerate pyramids after this process -- they are not automatically updated by GDAL when the "base layer" is updated. </div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">Best regards,</div><div class="gmail_default" style="font-family:arial,sans-serif">Frank</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 18, 2024 at 5:34 PM Carsten Lockenkötter via gdal-dev <<a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</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 class="msg4228850956568425313"><div lang="DE" style="overflow-wrap: break-word;"><div class="m_4228850956568425313WordSection1"><p class="MsoNormal">Hi,<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">is it possible to censor specific areas of an aerial image using GDAL?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I have several smaller tiles that I've already transformed into my desired coordinate system and generated internal pyramids.<u></u><u></u></p><p class="MsoNormal">Subsequently, I would like to censor certain areas based on polygons (e.g., from a shapefile or an Oracle DB) (coloring them grayish).<u></u><u></u></p><p class="MsoNormal">Set the color must be done after transforming coordinatesystem and generating pyramids.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I usually use the compiled Windows binaries from <a href="http://gisinternals.com" target="_blank">gisinternals.com</a>.<u></u><u></u></p><p class="MsoNormal">Presumably, my plan doesn't work with that, right? At least I haven't found anything in that direction.<u></u><u></u></p><p class="MsoNormal">I suppose this could be done with a Python, but I've never worked with Python before.<u></u><u></u></p><p class="MsoNormal">Do I need to adjust the internal pyramids as well? Or do I have to recreate them?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Could you please show me a brief example of how it could work, so I have an approach?<u></u><u></u></p><p class="MsoNormal">I just need an idea of how to implement this and possibly some tips on what else I need to consider.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Regards,<u></u><u></u></p><p class="MsoNormal">Carsten<u></u><u></u></p></div></div>_______________________________________________<br>
gdal-dev mailing list<br>
<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a><br>
<a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br>
</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><font face="monospace">---------------------------------------+--------------------------------------<br>I set the clouds in motion - turn up | Frank Warmerdam, <a href="mailto:warmerdam@pobox.com" target="_blank">warmerdam@pobox.com</a><br>light and sound - activate the windows | USA: +1 650-701-7823<a href="http://voice.google.com/calls?a=nc,%2B16507017823" rel="noopener" title="Call +1 650-701-7823 via Google Voice" target="_blank"></a><br>and watch the world go round - Rush | CAN: +1 343-550-9984</font></div></div></div></div></div>