In this chapter, we will explore the structure of the QGIS processing toolbox, identify which algorithm providers are available, and how to use these specialized algorithms. To accomplish these goals, we will ensure that the toolbox is properly configured, use a variety of specialized vector and spatial algorithms from the GRASS and SAGA libraries, and perform hydrologic analyses using the Terrain Analysis Using Digital Elevation Models (TauDEM) library. We will cover the following topics in this chapter:
Introduction to the toolbox
Configuring the toolbox
Structure of the toolbox
Performing spatial analyses using GRASS and SAGA
Performing a hydrologic analyses with TauDEM