Dear Developers, I am working on generating a mosaic, and I need to ensure that the maximum pixel value (dBZ) is selected when merging overlapping raster files. Despite my attempts using gdalbuildvrt and gdalwarp, I continue to encounter issues where it does not always pick the maximum pixel value in overlapping areas.
notes: CRS is EPSG:4326 and GDAL 3.8.5, released 2024/04/02 Commands Used: 1. gdalwarp -overwrite -multi -r max /nfs/radar/max-reflectivity/tiff/raw/*/2025/3/5/20250305T2145*.tif test-20250305T2145.png.composite.tif or gdalbuildvrt test-20250305T2145.png.composite.vrt /nfs/radar/max-reflectivity/tiff/raw/*/2025/3/5/20250305T2145*.tif gdalwarp -overwrite -q -r max test-20250305T2145.png.composite.vrt test-20250305T2145.png.composite.tif 2. gdaldem color-relief -alpha -q test-20250305T2145.composite.tif \ /color-ramps/reflectivity/titan.txt \ test-20250305T2145.png *Questions:* 1. How can I ensure that gdalbuildvrt properly stacks overlapping rasters while keeping the maximum pixel values? 2. Is gdalwarp -r max the correct approach to pick the highest dBZ reflectivity values? Any guidance or suggestions would be greatly appreciated! Thank you in advance for your help. With Regards, --
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