[Qgis-user] Slow rendering of vrt

[Micha Silver]

On 23/08/2012 11:33, Giovanni Manghi wrote:
> http://trac.osgeo.org/gdal/wiki/CatalogueForQIS

Magic! Many thanks, and also to Andrea Peri for posting the python code.
In windows I had to run it as: " python computestats.py -approx 
<filename.vrt> "
> it would be very nice to have this added as tool directly in QGIS...
>
> cheers
>
>
> -- Giovanni --
>
>
> On Thu, 2012-08-23 at 11:27 +0300, Micha Silver wrote:
>> Hello all:
>>
>> I have a batch of over 100 raster tiles in ecw format. Each is 50 -
>> 100 MB in size. When I choose 20 or so files to load they appear
>> (render) very quickly - in a matter of a few seconds or less. If I
>> create a vrt of that same batch of tiles, it takes a long time to
>> first render - upwards of 15 - 30 seconds.  Once the vrt is loaded
>> response is excellent (zooming, etc). But that initial delay is a bit
>> annoying. Anything I can do to improve it? (QGIS 1.8, Win 7 64 bit)
>>
>> Many thanks,
>> Micha
>>
>> -- 
>> Micha Silver
>> 052-3665918
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>> Qgis-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-user
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-- 
Micha Silver
052-3665918