Hi Stefan Does it need to be "gauss" as resampling method? You can use QGIS' own resampling functionality to get nice raster rendering.
Regards Stefan > -----Ursprüngliche Nachricht----- > Von: [email protected] > [mailto:[email protected]] Im > Auftrag von Jonathan Moules > Gesendet: Montag, 13. Oktober 2014 15:05 > An: 'Stefan Keller'; '[email protected]'; 'qgis-user' > Betreff: Re: [Qgis-user] Generating GeoTIFF overview ("gdaladdo -r gauss > ...") takes > days for 2GB file... > > Hi Stefan, > How large is the image? As in, pixel width & height. > > Also the GDALinfo would be helpful. > > 7 days is a very long time. I've seen times like that myself for images that > were > 100,000*50,000 or similar dimensions where there was (still is?) an issue > with the > pyramiding function in GDAL (it was re-reading the data again and again). > > Cheers, > Jonathan > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] > On Behalf Of Stefan Keller > Sent: Sunday, October 12, 2014 1:34 PM > To: [email protected]; qgis-user > Subject: [Qgis-user] Generating GeoTIFF overview ("gdaladdo -r gauss ...") > takes days > for 2GB file... > > Hi, > > I have a GeoTIFF file of 2GB size. Now, this question is about gdaladdo and > how to > optimize loading time of such a large raster file. > > According to my observations QGIS has fastest loading times when it's a single > GeoTIFF file with overview images. > > Q.1: Does anybody have tipps for even faster solutions loading raster files > into in QGIS > (prepared by OGR or other preprocessors)? > > The command "gdaladdo -r gauss C:\SG.tif 2 4 8 16 32 64 128 256" > takes actually about 7 days on a Lenovo notebook. > > Q2.: Any hint's on how to accelerate this (or to other tools generating > overviews/pyramids)? > > Yours, S. > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > > > This message has been scanned for viruses by MailControl - www.mailcontrol.com > > > > Click > https://www.mailcontrol.com/sr/pdM3aunlCjzGX2PQPOmvUgEBY15Clgt1cLVtYJoNw+TFa > pmLjYzc0LQlVsaeWay487vQIAp6KUWSPFO0UaI8cQ== to report this email as spam. > > ________________________________ > > HR Wallingford and its subsidiaries uses faxes and emails for confidential > and legally > privileged business communications. They do not of themselves create legal > commitments. Disclosure to parties other than addressees requires our specific > consent. We are not liable for unauthorised disclosures nor reliance upon > them. > If you have received this message in error please advise us immediately and > destroy > all copies of it. > > HR Wallingford Limited > Howbery Park, Wallingford, Oxfordshire, OX10 8BA, United Kingdom Registered in > England No. 02562099 > > ________________________________ > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
