[gdal-dev] Raster from temporary tiles
matthias at opengis.ch
Tue Jul 19 23:24:29 PDT 2016
On 20/07/16 08:20, Even Rouault wrote:
> Le mercredi 20 juillet 2016 08:08:07, Matthias Kuhn a écrit :
>> Hi Even
>> On 20/07/16 08:04, Even Rouault wrote:
>>> Hi Matthias,
>>> The GPKG driver is a full-blown raster driver with similar capabilites to
>>> the GeoTIFF one. That is you can use GDALCreate() to initialize an empty
>>> raster and then write arbitrary portions of it with GDALRasterIO(, ...,
>>> GF_Write, ...).
>>> You can also initialize empty overviews with GDALBuildOverviews( ...,
>>> "NONE", ... ) and write arbitrary raster content in them with
>>> GDALRasterIO() on the overview bands.
>> Thanks, good to know it's possible!
>> Is that available in
>> * command line tools
> For creation of an empty raster, I can't think of an existing easy way.
> For creation of empty overviews, yes with
> "gdaladdo -r NONE your.gpkg 2 4 ...."
> For update of an existing raster, with "gdalwarp in.tif out.gpkg"
> For update of overviews, likely with
> "gdalwarp in.tif out.gpkg -doo ZOOM_LEVEL=2" (caution the zoom level is in the
> GPKG meaning, and not with the GDAL convention. ie ZOOM_LEVEL=0 is the less
> detailed overview level)
>> * the python API
> Sure. The Python API wraps alls those basic calls
> The driver tests might be a useful resource:
Awesome, thanks a lot Even!
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