[gdal-dev] Rasterlite and external overviews

[Rahkonen Jukka]

Even Rouault wrote:

>> While trying external overviews I found two troubles. First one is that
>> it isimpossible to build external overviews if there has been internal
>> overviews in the table. Removing them with "gdaladdo -clean" does not
>> help, the message is still:
>> ERROR 6: Cannot add external overviews to a dataset with internal overviews
>> Overview building failed.

> I don't reproduce that. Did you check with gdalinfo that the internal overview
> was properly cleaned ?

Works fo me too now when doing test in a controlled way. Perhaps the database was locked by another software and internal overviews were not cleaned.

...
>>
>> It would be really good to have at least average method also for
>> internal overviews.

> Thinking about it again, this might be doable with modest code addition in the
> driver. Please file a ticket about that.

Filed as #4740.

-Jukka Rahkonen-