I did everything as described in the documentation. 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. The download is very slow. https://youtu.be/LULngZIs4nc
вт, 13 дек. 2022 г. в 09:45, Regina Obe <l...@pcorp.us>: > PostGIS raster sadly doesn’t use the pyramids in the Tifs. Or if it does > no one told me. > > > > You should build raster overviews using the raster2pgsql –l switch. > > https://postgis.net/docs/using_raster_dataman.html#RT_Raster_Loader > > > > Doc example is this which builds a level 2 and 4 pyramid > > 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 > > > > QGIS knows how to use the overviews built that way and should be much > faster to view in QGIS > > > > raster2pgsql -s 4326 -t 256x256 -C -I -F "d:\Temp\060 tiff\res\OCG_t1.tif" > OCG_t1 -R| psql. > > > > > > *From:* postgis-users [mailto:postgis-users-boun...@lists.osgeo.org] *On > Behalf Of *Alex German > *Sent:* Monday, December 12, 2022 11:34 PM > *To:* PostGIS Users Discussion <postgis-users@lists.osgeo.org> > *Subject:* [postgis-users] Qgis + PostGis. Low operating speed. > > > > Hello everyone! > > I have a GeoTIFF. > > I built the pyramids in an external file using GDAL > > "gdaladdo d:\Temp\060 tiff\res\t1.tif -r lanczos -ro 2 4 8 16 32 64 128 > 256 512. > > Uploaded to PostGIS using > > raster2pgsql -s 4326 -t 256x256 -C -I -F "d:\Temp\060 tiff\res\OCG_t1.tif" > OCG_t1 -R| psql. > > The number of files is more than 1000. > > When trying to load tables in QGis, the loading is very slow. > > 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? > > > > -- > > Alex German > > > _______________________________________________ > postgis-users mailing list > postgis-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/postgis-users > -- Алексей Герман 8-905-86-00-416
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