Re: [gdal-dev] Re: Censor area in tiles of aerial image

[Carsten Lockenkötter via gdal-dev]

Hi Frank, I have read about gdal_rasterize but it seems it works a bit different as i need it. Gdal_rasterize converts a vector layer to a raster layer with specific dimensions and create a new file, like a mask. It could be work for me yes, because i publish the raster files as image mosiac at the geoserver. Maybe the new "mask" file overlays on me original files and the created wmts tiles of the geoserver could contain the mask. I will try it, but is there another option to burn the vectorlayer into existing tiles? Regards, Carsten Am 19.03.24, 00:14 schrieb Frank Warmerdam <warmer...@pobox.com>: Carsten, 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. You would have to regenerate pyramids after this process -- they are not automatically updated by GDAL when the "base layer" is updated.  Best regards, Frank On Mon, Mar 18, 2024 at 5:34 PM Carsten Lockenkötter via gdal-dev <gdal-dev@lists.osgeo.org> wrote: Hi,   is it possible to censor specific areas of an aerial image using GDAL?   I have several smaller tiles that I've already transformed into my desired coordinate system and generated internal pyramids. Subsequently, I would like to censor certain areas based on polygons (e.g., from a shapefile or an Oracle DB) (coloring them grayish). Set the color must be done after transforming coordinatesystem and generating pyramids.   I usually use the compiled Windows binaries from gisinternals.com. Presumably, my plan doesn't work with that, right? At least I haven't found anything in that direction. I suppose this could be done with a Python, but I've never worked with Python before. Do I need to adjust the internal pyramids as well? Or do I have to recreate them?   Could you please show me a brief example of how it could work, so I have an approach? I just need an idea of how to implement this and possibly some tips on what else I need to consider.   Regards, Carsten _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up   | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | USA: +1 650-701-7823 and watch the world go round - Rush    | CAN: +1 343-550-9984

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