Hi,
The only idea that pops to mind would be to ..

1.       Create a Tile Index of all your raster’s with the Full Path (Absolute 
Path)option

2.       Style the index using a Python action similar to the following (See 
Image Below as example)
qgis.utils.iface.addRasterLayer("[%location%]”, "inserted_raster")

3.       You can use this to insert the raster’s into the canvas using the 
index.

4.       Once the nine raster’s you want are inserted build a Virtual Raster 
(*.vrt) of them

5.       Repeat for all other rasters

[cid:[email protected]]

Hope this goes some way to a solution.
Regards,

Richard


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Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

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From: Qgis-user <[email protected]> On Behalf Of aneta strzalka
Sent: 12 February 2020 07:31
To: [email protected]
Subject: [Qgis-user] Grid_Aggregation

Hi All,

I have a question. I have a grid file with many tiles. Each of the tile has 8 
adjacent tiles. I would like to make an aggregation for each tile with his 8 
adjacent tiles. How can I do it in QGIS; what function should I use?
I would be very grateful for any support.

Best wishes.
Aneta.
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