Chapter 7. Raster Analysis I
In this chapter, we will cover the following recipes:
- Using the raster calculator
- Preparing elevation data
- Calculating a slope
- Calculating a hillshade layer
- Analyzing hydrology
- Calculating a topographic index
- Automate analysis tasks using the graphical modeler
Introduction
Raster analysis is a classic area in GIS analysis. This chapter shows you some of the most important and common tasks of raster analysis. Elevation data is commonly stored as raster layers, and in this format, it is particularly suitable to run a large variety of analysis. For this reason, terrain analysis has traditionally been one of the main areas of raster analysis, and we will show you some of the most common operations that are related to Digital Elevation Models (DEM), from simple analysis, such as slope calculation, to more complex ones, such as drainage network delineation or watershed extraction.
Using the raster calculator
The raster calculator is one of the most flexible and versatile...
