[Qgis-user] Problem zooming in on ECW files in QGIS

[Stefan Sylla]

I had the same issue. Unfortunately I did not find a way to solve it, 
however, I am doing a workaround by converting the ecw-files into JPEGs 
using gdal_translate (in QGIS this would be under >Raster >Conversion 
 >translate). The JPEGs will have the same size as the ecw's and you get 
rid of that zoom-problem and many other issues caused by ECW.

On 05/31/2014 03:41 AM, CornGiS [via OSGeo.org] wrote:
>  I opened a 490mb ecw image in QGIS on my mac (using the ecw 1.10.1 
> GDAL-ECW plug-in & 5.1.1. ERDAS Image Compression SDK read-only for 
> desktop).
>
> The ecw is loaded in less than a second, but it seems that QGIS does 
> not manage to completely uncompress the ecw file, as zooming in 
> results in a blurry picture. If I open the ecw file using IrfanView I 
> can zoom in without any problem and get a decent picture..
>
> Did anybody have a similiar experience? Does anybody know how to fix 
> this problem? Any help is appreciated, thank you!
>
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