Integrating SAGA 7.8.1 into QGIS 3.16 (OS Windows 10)

SAGA 7.8 comes with saga4qgis and it provides support for SAGA Algorithms through QGIS Processing Toolbox.

This is a short instruction to install saga4qgis into QGIS 3.16, on Windows10 environment.

(1) Download latest SAGA

Visit SAGA in SorceForge.net, and download the latest zipped version of SAGA (i.e. saga-7.8.2_x64.zip).

(2) Unzip downloaded SAGA and search for saga4qgis.zip file.

(3) Unzip saga4qgis.zip

You will find two files and a folder.

• readme.txt: This is the instruction (see below).
• SagaNameDecorator.py
• description (folder with lots of description files)

Open readme.txt - it is short and sweet

Replace the SAGA binaries in:
> C:Program FilesQGIS X.Yappssaga(-ltr)

Adjust the interface in:
> C:Program FilesQGIS X.Yappsqgis(-ltr)pythonpluginsprocessingalgssaga(-ltr)

Adjust version in file:
> SagaAlgorithmProvider.py
>> REQUIRED_VERSION = '7.7.'

(4) Folow the instruction as written in readme.txt.

That's it - below is my note but it has no additional information.

1. Open up [aa] C:Program FilesQGIS 3.16appssaga-ltr folder and delete all files inside it.
2. Copy all files of unzipped saga-7.8.2_x64.zip to the above folder [aa].
3. Open up [bb] C:Program FilesQGIS 3.16 apps qgis python plugins processing algs saga and search for SagaNameDecorator.py file. Replace this file by new SagaNameDecorator.py (which is in saga4qgis.zip).
4. In the same [bb] folder, find SagaAlgorithmProvide.py and open it by a text editor (e.g. Notepad++). Change REQUIRED_VERSION = '2.3.' to REQUIRED_VERSION = '7.7.'.
5. You will find description folder in the same [bb] folder. Delete all files in this [bb]description folder, and copy all description files in saga4qgisdescription into this.
6. Start QGIS 3.16 and examine QGIS Processing Toolbox.