[Qgis-user] Importing a raster into a Geopackage

[Nicolas Cadieux]

Hi,

Send a sample data set if you can't figure it out.

Nicolas

On 2020-12-01 10:35 a.m., Nicolas Cadieux wrote:
> Hi,
> Perhaps this can help: https://gdal.orgdrivers/raster/gpkg.html 
> <https://gdal.orgdrivers/raster/gpkg.html>
>
> “Various kind of input datasets can be converted to GeoPackage raster :
>
>  *
>
>     Single band grey level
>
>  *
>
>     Single band with R,G,B or R,G,B,A color table
>
>  *
>
>     Two bands: first band with grey level, second band with alpha channel
>
>  *
>
>     Three bands: Red, Green, Blue
>
>  *
>
>     Four band: Red, Green, Blue, Alpha
>
> GeoPackage rasters only support Byte data type.”
>
> My guess is that if the original raster does not correspond to one of 
> the categories above, it will be converted to the closest format.
>
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
>
>> Le 1 déc. 2020 à 09:58, Alberto Vavassori 
>> <alberto.vavassori at polimi.it> a écrit :
>>
>> 
>>
>> Hello everybody. I have an issue regarding the Geopackage format. I 
>> have tried to import a singleband raster file (it represents the land 
>> cover, thus every pixel has a single integer value corresponding to 
>> the land cover class), but this operation seems to modify the raster 
>> characteristics: the raster becomes a 4-bands raster and the pixels 
>> values change accordingly (basically, the original raster is saved in 
>> the Geopackage as an RGB image). It seems to be a bug of QGIS. I have 
>> also tried to use GDAL translate through the processing toolbox of 
>> QGIS to convert the TIFF file to a Geopackage file, but the result is 
>> the same.
>>
>> Has anybody faced this problem? May anybody suggest a way to work 
>> this problem out?
>>
>> Thank you.
>>
>> Alberto
>>
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-- 
Nicolas Cadieux
https://gitlab.com/njacadieux

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