6  Unsupervised Satellite Image Classification for Urban Land Cover Mapping

6.1 Overview

In this chapter, you will gain hands-on experience on using QGIS and Semi-Automatic Classification Plugin of QGIS to perform unsupervised satellite image classification for urban land cover mapping. It is a continuation of Chapter 2. We assume that you already have Landsat 8 data set(s) downloaded. If you have yet to do so, please refer to Chapter 2: Acquiring Landsat 8 Data to download a Landsat 8 data set of an area of interest.

By the end of this chapter, you will acquire the skills to:

• extract subset from a complete scene,
• enhance individual band for clearer visualisation,
• create composite images by using multiple bands for visual interpretation,
• compute vegetation indices for land cover analysis.