[Qgis-user] qgis 1.7 geotiff problem

Stefan Sylla stefansylla at gmx.de
Fri Jun 17 00:38:48 PDT 2011


Dear list,

I have some very large geotiff-files (up to 10 GB) from satellite imagery
that I need to load into QGIS. To speed up the rendering, I created pyramids
on those images with gdaladdo. In QGIS 1.6 this worked very fine and the
images where loaded (after adding them with "Add Raster Layer") within a few
seconds. 

Now, after I updated to QGIS 1.7, it takes several minutes to load the
images into QGIS with "Add Raster Layer" (after being loaded, however,
everything works fine and I can zoom in and out without any time-consuming
rendering processes).

Anyone has an idea why QGIS 1.7 takes so much time to load the images, as it
was working fine in QGIS 1.6?

I am using QGIS on Ubuntu 10.10 64bit.

Hope someone can help
Stefan

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