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I have several Landsat 5 Images to merge together. As far as I saw from tutorials and previous questions there are two main methods (and none seem to be working for me):

1 - raster » miscelaneous » merge

2 - SAGA's Mosaic Rasters Layers

I just reinstalled Qgis 3.10 Coruna in Windows. All landsat images were obtained with the SCP pluggin

I made some screen shots to further explain: These are the images I want to merge Image1 - band 3 Image2 - band3

Method 1- Merge

I set the following parameters. I didn't forget to assign "0" as no data.

Parameters for merging

The end result was quite surprising. Not only it eliminated the overlapping pixels but also created this rectangular areas with a 0 value. Those areas are outside the limits of both images.

Merged result

Method 2 - SAGA's Mosaic Rasters Layers

I followed the parameters in one previous question: Saga Parameters

but the results weren't generated Saga Log

I confirmed: both images are in the same Datum. What can be the problem?

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  • The error in the saga is probably due to spaces and accents in folder names. So much to copy to the root (D: /) and run again. O erro no saga é provavelmente devido aos espaços e acentos nos nomes das pastas. Tanta copiar pra raiz(D:/) e executar novamente.
    – hugonbg
    Feb 11, 2021 at 23:41
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    You are absolutly right. I run it in folders with simplier names, and it worked perfectly with SAGA
    – Tiago C
    Feb 12, 2021 at 1:44

1 Answer 1

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The error in the saga is probably due to spaces and accents in folder names. So copy to the root (D: /) and run again.

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  • Yes. That was the problem. Saga is now operational. What can be the problem with the GDAL tool, then?
    – Tiago C
    Feb 15, 2021 at 19:11

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