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Do you need to configure QGIS to install Saga?
If you are running Windows, both the stand-alone installer and the OSGeo4W installer include SAGA along with QGIS, and the path is automatically configured, so there is no need to do anything else. If you have installed SAGA yourself (remember, you need version 2.1), the path to the SAGA executable must be configured.
How do I run it from QGIS?
How do I run it from QGIS? SAGA and the other Processing modules are configured under Processing -> Options and Configuration -> Providers. From QGIS 2.0 onwards, SAGA should come with the QGIS standalone installer, so no need to install and configure it manually.
Why are algorithm descriptions included in QGIS installation?
This is because the algorithm descriptions (needed to create the parameters dialog and provide the information needed about the algorithm) are not included with each application, but with QGIS instead. That is, they are part of QGIS, so you have them in your installation even if you have not installed any other software.
Where can I find Saga 2.0.8 compatibility?
If you used the OSGEO4W setup, all installations should go to C:\\OSGEO4W or C:\\OSGEO4W64; including SAGA and GRASS. Try this: in the Processing -> Options -> Providers look for SAGA (2.1) and check Enable Saga 2.0.8 compatibility.
How to configure Saga on Windows 2.1?
If you have installed SAGA yourself (remember, you need version 2.1), the path to the SAGA executable must be configured. To do this, open the configuration dialog. In the SAGA block, you will find a setting named SAGA Folder. Enter the path to the folder where SAGA is installed.
Is it possible to enable an external appplication in QGIS?
By default, all algorithms that rely on an external appplication not shipped with QGIS are not enabled. You can enable them in the configuration dialog. Make sure that the corresponding application is already installed in your system.
Do you need frameworks to install QGIS on Mac?
Unlike the Windows install version, the Mac version requires the installation of two frameworks before you install the QGIS package. While QGIS can install without first installing the frameworks, download the GDAL and GSL frameworks and install them to ensure a more robust installation of QGIS.
How big of a file is the QGIS installer?
The standalone installer is one big file to download (approximately 280 MB); it contains a QGISrelease, the Geographic Resources Analysis Support System (GRASS) GIS, as well as the System for Automated Geoscientific Analyses (SAGA) GISin one package.
Where can I get the source code for QGIS?
The QGIS project provides ready-to-use packages as well as instructions to build from the source code at https://qgis.org/en/site/forusers/download.html. In this section, we will explain on how to install QGISon Windows, Ubuntuand Mac OS X, as well as how to avoid the most common pitfalls.