Bug report #1084
ECW takes a long time to display
|Affected QGIS version:||Regression?:||No|
|Operating System:||OS X||Easy fix?:||No|
|Pull Request or Patch supplied:||Resolution:||duplicate|
|Crashes QGIS or corrupts data:||Copied to github as #:||11144|
In 0.9.1 ECW display is instantaneous, no matter how large the ECW was, probably because it used the inherent overviews. In 0.10.0 ECW takes a lot longer to display.
As a example, any of the Blue Marble ECW images takes about a minute before anything is displayed, during this time there is a lot of disk read activity. I gave up waiting for the Landsat742 ECW to display. I hadn't tried until now, but it's the same with 0.9.2rc1. I wonder if Qgis is not reading the overviews now?
I don't have a large JP2 to try, but I wonder if they have the same problem, since both ECW and JP2 have inherent overviews.
OSX 10.5.2, GDAL 1.5.1.
#1 Updated by ersts - almost 15 years ago
- Resolution set to duplicate
- Status changed from Open to Closed
#2 Updated by William Kyngesburye almost 15 years ago
Ah, my brain's pattern-matching missed this as I scanned the full bug list ;) Bummer that I have to open a raster first to set this option...