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: qgis-user-boun...@lists.osgeo.org [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Stefan Keller Sent: Sunday, October 12, 2014 1:34 PM To: gdal-...@lists.osgeo.org; 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 Qgis-user@lists.osgeo.org 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+TFapmLjYzc0LQlVsaeWay487vQIAp6KUWSPFO0UaI8cQ== 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 Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
