[gdal-dev] I cannot clean overviews from GeoTIFF

[Javier Jimenez Shaw]

Thanks Jukka. That was my first guess.

However before sending the email I checked it. "ls -l" is telling me this
(I understand I can modify it)

$ ls -l out/test.tif
-rw-r--r--  1 jshaw  staff  1356600907 May 12 11:38 out/test.tif



On Mon, 12 May 2025 at 12:40, Rahkonen Jukka <
jukka.rahkonen at maanmittauslaitos.fi> wrote:

> Hi,
>
> Tested with GDAL 3.12.0dev-8130fe444e, released 2025/04/28 (OSGeo4W) on
> Windows.
>
> gdaladdo addo.tif -clean --debug on
> ...
> GDAL: GDALOpen(addo.tif, this=000002E622185320) succeeds as GTiff.
> GTiff: ScanDirectories()
> GTiff: Opened 6000x6000 overview.
> GTiff: Opened 3000x3000 overview.
> GTiff: Opened 1500x1500 overview.
> GTiff: Opened 750x750 overview.
> GTiff: Opened 375x375 overview.
> GTiff: Opened 188x188 overview.
> GDAL: GDALClose(addo.tif, this=000002E622185320)
>
> However, if I set the test file "addo.tif" into read-only with file
> manager, I get the same messages than you do. Could it be that simple?
>
> -Jukka Rahkonen-
>
> ________________________________________
> Lähettäjä: gdal-dev käyttäjän Javier Jimenez Shaw via gdal-dev puolesta
> Lähetetty: Maanantai 12. toukokuuta 2025 13.01
> Vastaanottaja: gdal dev
> Aihe: [gdal-dev] I cannot clean overviews from GeoTIFF
>
> HiI 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 overviewsCleaning
> overviews failed.GDAL: GDALClose(out/test.tif, this=0x133058e00)$ gdaladdo
> --versionGDAL 3.11.0 "Eganville", released 2025/05/06I am running it on a
> Mac.Cheers,Javier.
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