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<p class="MsoNormal"><span lang="EN-US">Also note there are issues and memory leaks with the PG raster reader in QGIS.
</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><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">See </span><a href="https://github.com/qgis/QGIS/issues/47815"><span lang="EN-US">https://github.com/qgis/QGIS/issues/47815</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Jakob<span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> postgis-users <postgis-users-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Alex German<br>
<b>Sent:</b> Tuesday, December 13, 2022 10:12 QGIS<br>
<b>To:</b> PostGIS Users Discussion <postgis-users@lists.osgeo.org><br>
<b>Subject:</b> Re: [postgis-users] Qgis + PostGis. Low operating speed.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">QGis does not pick up overviews.
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">Separately, overviews are loaded very quickly.
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">I.e. if I load o_16_t6 in qgis, then the download speed is excellent.
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">In the properties of the table, there are overviews.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">вт, 13 дек. 2022 г. в 12:29, Alex German <<a href="mailto:gr1047@gmail.com">gr1047@gmail.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal"><img border="0" width="562" height="135" style="width:5.8541in;height:1.4062in" id="_x0000_i1025" src="cid:image001.png@01D90EF0.5A3939E0" alt="image.png"><o:p></o:p></p>
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<p class="MsoNormal">SRID in postgis 4326<o:p></o:p></p>
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<p class="MsoNormal"><img border="0" width="194" height="159" style="width:2.0208in;height:1.6562in" id="_x0000_i1026" src="cid:image002.png@01D90EF0.5A3939E0" alt="image.png"><o:p></o:p></p>
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<p class="MsoNormal">SRID in QGis 4326<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">вт, 13 дек. 2022 г. в 12:05, Bo Victor Thomsen <<a href="mailto:bo.victor.thomsen@gmail.com" target="_blank">bo.victor.thomsen@gmail.com</a>>:<o:p></o:p></p>
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<p>Is the rasters in same projection (CRS) as the QGIS project ? <o:p></o:p></p>
<pre>Med venlig hilsen / Best regards<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Bo Victor Thomsen<o:p></o:p></pre>
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<p class="MsoNormal">Den 13-12-2022 kl. 07:50 skrev Alex German:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">I did everything as described in the documentation.
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">raster2pgsql -I -C -e -Y -F -s 4326 -t 128x128 -l 2,4,8,16,32 "d:\Temp\060 tiff\res\t1.tif" testrastr.t1 | psql.
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">The download is very slow.</span><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://youtu.be/LULngZIs4nc" target="_blank">https://youtu.be/LULngZIs4nc</a><span style="font-size:10.0pt;color:black">
</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">вт, 13 дек. 2022 г. в 09:45, Regina Obe <<a href="mailto:lr@pcorp.us" target="_blank">lr@pcorp.us</a>>:<o:p></o:p></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
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<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">PostGIS raster sadly doesn’t use the pyramids in the Tifs. Or if it does no one told
me.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You should build raster overviews using the raster2pgsql –l switch.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://postgis.net/docs/using_raster_dataman.html#RT_Raster_Loader" target="_blank">https://postgis.net/docs/using_raster_dataman.html#RT_Raster_Loader</a></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Doc example is this which builds a level 2 and 4 pyramid</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre><span lang="EN-US">raster2pgsql -I -C -e -Y -F -s 26986 -t 128x128 -l 2,4 bostonaerials2008/*.jpg aerials.boston | psql -U postgres -d gisdb -h localhost -p 5432<o:p></o:p></span></pre>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">QGIS knows how to use the overviews built that way and should be much faster to view in
QGIS</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">raster2pgsql -s 4326 -t 256x256 -C -I -F "d:\Temp\060 tiff\res\OCG_t1.tif" OCG_t1 -R| psql.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> postgis-users
[mailto:<a href="mailto:postgis-users-bounces@lists.osgeo.org" target="_blank">postgis-users-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Alex German<br>
<b>Sent:</b> Monday, December 12, 2022 11:34 PM<br>
<b>To:</b> PostGIS Users Discussion <<a href="mailto:postgis-users@lists.osgeo.org" target="_blank">postgis-users@lists.osgeo.org</a>><br>
<b>Subject:</b> [postgis-users] Qgis + PostGis. Low operating speed.</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">Hello everyone!</span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">I have a GeoTIFF.
</span><span lang="EN-US"><o:p></o:p></span></p>
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<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">I built the pyramids in an external file using GDAL
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">"gdaladdo d:\Temp\060 tiff\res\t1.tif -r lanczos -ro 2 4 8 16 32 64 128 256 512.
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">Uploaded to PostGIS using
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">raster2pgsql -s 4326 -t 256x256 -C -I -F "d:\Temp\060 tiff\res\OCG_t1.tif" OCG_t1 -R| psql.
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">The number of files is more than 1000.
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">When trying to load tables in QGis, the loading is very slow.
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;color:black">At the same time, downloading to QGis from files is fast. Question. What is not configured correctly and how to speed up
the download to Qgis from PostGIS?</span><span lang="EN-US"><br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">--
<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Alex German<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal">_______________________________________________<br>
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<p class="MsoNormal">Алексей Герман <o:p></o:p></p>
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<p class="MsoNormal">8-905-86-00-416<o:p></o:p></p>
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<pre>_______________________________________________<o:p></o:p></pre>
<pre>postgis-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:postgis-users@lists.osgeo.org" target="_blank">postgis-users@lists.osgeo.org</a><o:p></o:p></pre>
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<p class="MsoNormal">Алексей Герман<o:p></o:p></p>
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<p class="MsoNormal">8-905-86-00-416<o:p></o:p></p>
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<p class="MsoNormal">Алексей Герман<o:p></o:p></p>
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