Ticket #1084 (closed defect: duplicate)
ECW takes a long time to display
|Reported by:||kyngchaos||Owned by:||nobody|
|Priority:||major: does not work as expected||Milestone:|
|Platform Version:||Platform:||OS X|
|Must Fix for Release:||No||Awaiting user input:||no|
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.