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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Let’s say that I have these raster maps with 2048 m and 1024 m pixel sizes<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.png">http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.png</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.pgw">http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.pgw</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.png">http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.png</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.pgw">http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.pgw</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Converting the 8milj.png into GeoPackage raster table is easy<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">gdal_translate -of gpkg –a_srs epsg:3067 Taustakartta_8milj.png overview.gpkg<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Image goes to zoom level 2 as reported by gdalinfo:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Metadata:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> IDENTIFIER=overview<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> ZOOM_LEVEL=2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But now the hard part: I would like to append the second image 4milj.png to the same layer “overview” as ZOOM_LEVEL=3 because that map is designed for that resolution. Is it possible to do that by using some parameters
of the driver <a href="http://www.gdal.org/drv_geopackage_raster.html">http://www.gdal.org/drv_geopackage_raster.html</a> or with some clever trick?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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