[QGIS-ZA-user] VRT stacking order

[Zoltan Szecsei]

Hi Gavin,
Cool - I missed that bit of the blurb.
What's nice is that it allows one to script the build-vrt process and 
use parts of filenames as your processing order :-)  (rather than 
alphabetical etc)
Regards & thanks,
Zoltan

On 2018/03/16 11:59, Gavin Fleming via qgis-za-user wrote:
> 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
>
>> On 16 Mar 2018, at 11:34, Mazano via qgis-za-user 
>> <qgis-za-user at lists.osgeo.org <mailto: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 pluginVirtual-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
>>>
>>> P.O. Box 7, Muizenberg 7950, South Africa.
>>>
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>>> Fax:    +27-86-6115323 www.geograph.co.za
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-- 

=============================================
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:    +27-86-6115323     www.geograph.co.za
=============================================

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