Hi Radim, thx for hint. I try to set the contrast enhancement to NO STRETCH and Limits to minimum / maximum , Apparently seem to have no result. The qgis is locked in opening of raster, but of course I should wait for some hours to see if some improvements is occursed.
A. 2015-07-30 9:52 GMT+02:00 Radim Blazek <[email protected]>: > On Thu, Jul 30, 2015 at 9:19 AM, Andrea Peri <[email protected]> wrote: >> Hi, >> >> I have a GeoTiff raster of 24Gbyte, floating point (Float64) with 11 >> bands and fomat geotiff. >> >> When try to open it with qgis 2.8.1 I see it take a really uge time to >> open it (about 10 hours). >> Initially I guess that was a time due to the huge dimension, but after >> the qgis show it. >> I notice that it is reallyquickly to zoom and pan. >> I don't understand why this difference between the open time and zoom/pan >> time. >> >> My first suspect was that qgis want to calculate the statistics in first >> open. >> But after a check with gdalinfo I see the statistics are available >> also in original tiff. > > QGIS defaults are stretch to 2/98% cut, try to set in > Options > Rendering > Rasters > Contrast enhancement: No stretch or Limits: Minimum / maximum > > Radim > > >> So I dont know really why it take so more time to open it. >> >> I hope to find some setting to reduce the pen time for this kind of images. >> >> Thx, >> >> A. >> >> -- >> ----------------- >> Andrea Peri >> . . . . . . . . . >> qwerty àèìòù >> ----------------- >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user -- ----------------- Andrea Peri . . . . . . . . . qwerty àèìòù ----------------- _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
