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

[Simon Cropper]

Hi Stefan,

Can you share the code to convert between ECW and JPG using GDAL?

Are there any prerequisites apart from GDAL ?

Thanks Simon

On 31/05/14 13:54, Stefan Sylla wrote:
> 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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-- 
Cheers Simon

    Simon Cropper - Open Content Creator

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