<div dir="ltr"><br><div>Dear all,<br><br>I just had an error while converting an image to GPKG. This image has a very small resolution and gdal_translate pops up an error message.<br><br><u>Test image :</u><br>gdal_create -of GTiff -co COMPRESS=DEFLATE -outsize 2000 2000 -burn 255 -burn 0 -burn 0 -bands 3 -ot Byte -a_srs epsg:32631 -a_ullr 1000000 1000000 1000002 1000002 1mm.tif<br><br><u>Conversion to GPKG :</u><br>gdal_translate -of GPKG -co TILING_SCHEME=InspireCRS84Quad -co ZOOM_LEVEL_STRATEGY=UPPER 1mm.tif 1mm.gpkg<br>Input file size is 2000, 2000<br>ERROR 1: Could not find an appropriate zoom level<br><br><u>Analysis</u></div><div>The error is due to
<a href="https://github.com/OSGeo/gdal/blob/master/ogr/ogrsf_frmts/gpkg/ogrgeopackagedatasource.cpp#L3169" class="external-link" target="_blank" rel="nofollow noopener" title="Follow link">ogrgeopackagedatasource.cpp</a> (line 3169), and it does make sense : the zoom level is too high (Z>25).</div><div><br></div><div>However, wouldn't it be possible to modify gdal_translate behavior ?</div><div>For example, we could :</div><div><ul><li>let GDAL compute the appropriate zoom level : -co ZOOM_LEVEL_STRATEGY=AUTO/LOWER/UPPER,</li><li>optionally specify a maximum zoom level : -co MAX_ZOOM_LEVEL=18</li></ul><div>What do you think ?</div></div><div><br></div><div>Philippe</div><div><br></div></div>
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