[gdal-dev] I cannot clean overviews from GeoTIFF

[Javier Jimenez Shaw]

Hi

I am trying to clean the overviews from a GeoTIFF, but gdaladdo does not
allow me.
Is that an expected behaviour? Maybe I am missing more options. (there is
no opposite of "-ro")

$ gdaladdo --debug on -clean out/test.tif
GDAL: GDALOpen(out/test.tif, this=0x133058e00) succeeds as GTiff.
GTiff: ScanDirectories()
GTiff: Opened 6978x5110 overview.
GTiff: Opened 3489x2555 overview.
GTiff: Opened 1744x1277 overview.
GTiff: Opened 872x638 overview.
GTiff: Opened 436x319 overview.
GTiff: File open for read-only accessing, creating overviews externally.
ERROR 6: test.tif: Cannot add external overviews when there are
already internal overviews
Cleaning overviews failed.
GDAL: GDALClose(out/test.tif, this=0x133058e00)

$ gdaladdo --version
GDAL 3.11.0 "Eganville", released 2025/05/06


I am running it on a Mac.

Cheers,

Javier.
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