I have 4 scenes of raster images that I need to merge. Average size of the scenes is only 60 MB, but the merged scene ended up at 6 GB in file size. Does anyone know why this happened?
Answer
Have you tried adding compression to the creation options, e.g.
gdal_merge.py input1.tif input2.tif -o output.tif -co 'COMPRESS=LZW'
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