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

2024-03-19 Thread Frank Warmerdam via gdal-dev
Carsten, gdal_rasterize definitely supports burning into existing files. I'm not sure about the configuration of your raster -- some formats are not updatable-in-place, but the limitation isn't in gdal_rasterize. Best regards, Frank On Tue, Mar 19, 2024 at 8:42 AM Carsten Lockenkötter < carsten

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

2024-03-19 Thread Even Rouault via gdal-dev
Why not just trying? Demo: $ gdal_create -outsize 10 10 -burn 255 test.tif -a_srs EPSG:4326 -a_ullr 0 10 10 0 $ gdal_rasterize -burn 0 '{"type":"Polygon","coordinates":[[[2,2],[2,4],[4,4],[4,2],[2,2]]]}' test.tif $ gdal_translate test.tif /vsistdout/ -of aaigrid ncols    10 nrows   

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

2024-03-19 Thread Even Rouault via gdal-dev
Thomas, Le 19/03/2024 à 08:26, thomas bonfort via gdal-dev a écrit : I have a side-question concerning the update-in-place behavior of the gtiff driver in this case: given that a compressed strile will nearly always be smaller after this update (due to better compression ratios on the uniform

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

2024-03-19 Thread thomas bonfort via gdal-dev
I have a side-question concerning the update-in-place behavior of the gtiff driver in this case: given that a compressed strile will nearly always be smaller after this update (due to better compression ratios on the uniform area), will libtiff overwrite the previous strile in place also, or will i

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

2024-03-18 Thread Frank Warmerdam via gdal-dev
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 sup

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

2024-03-18 Thread Carsten Lockenkötter via gdal-dev
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 shapefil