[QGIS-ZA-user] VRT stacking order

[Gavin Fleming]

Hi Zoltan

> If there is some amount of spatial overlapping between files, the order of files appearing in the list of source matter: files that are listed at the end are the ones from which the content will be fetched.

from http://www.gdal.org/gdalbuildvrt.html <http://www.gdal.org/gdalbuildvrt.html> 

> On 16 Mar 2018, at 11:34, Mazano via qgis-za-user <qgis-za-user at lists.osgeo.org> wrote:
> 
> Hi Zoltan
> 
> 
> On 03/16/2018 10:18 AM, Zoltan via qgis-za-user wrote:
>> Hi, 
>> Is there a (repeatable) way to specify the stacking order of rasters in a VRT? 
>> Maybe by adding them one by one, oldest first? 
> Have you tried using the plugin Virtual-raster-builder <https://bitbucket.org/jakimowb/virtual-raster-builder>. It provides a nice GUI for creating stacks and it might do what you want to do.
> 
> Regards
>> 
>> The National orthos in South Africa have an overlap region and as they are flown in different time periods, I want to specify the stacking order and not 'blend' the pixels or put older ones on top when viewing the VRT. 
>> 
>> 
>> Thanks in advance, 
>> Zoltan 
>> 
>> -- 
>> 
>> ============================================= 
>> Zoltan Szecsei GPrGISc 0031 
>> Geograph (Pty) Ltd. 
>> GIS and Photogrammetric Services 
>> 
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>> 
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