> Objective

• The students will learn more about how to work with raster data 

• The students will learn how to clip raster data  

• The students will learn how to create attributes tables for raster data  

> Index / Table of Contents

• Introduction  

• Tutorial(s)  

  • Raster data 

  • Clip rasters 

  • Attribute tables  

• QGIS installation  

> Summary and Highlights

Introduction 

The following tutorials addresses raster data. The first tutorial covers the basics of working with raster data. Then, a tutorial shows how to clip raster data. The last part covers how to add raster data to an attribute table.  

Tutorial(s) 

Basics 

• Working with raster data   QGIS Training manual: “7.1. Working with Raster Data”  Language(s): English  Chapters: follow along: loading raster data, follow along: create a virtual raster, transforming raster data, merging rasters, in conclusion, what’s next   https://docs.qgis.org/3.10/en/docs/training_manual/rasters/data_manipulation.html  

Clip rasters  

A part of a raster can be extracted. The following tutorial shows how to clip rasters.  

• Clip a raster using a mask polygon layer   Hans van der Kwast: “Iteratively clip a raster with a polygon layer in QGIS”  Language(s): English  Time: 4min 52s   Chapters: introduction (start-0:28), clip raster by mask layer (0:28-1:24), create a new model (1:24-end)   https://www.youtube.com/watch?v=e5iWslQc7sY  

Attribute tables  

Attribute tables contain information on the features of a given layer. The following tutorial explains how to add one for a raster layer.  

• Add raster attribute tables   Hans van der Kwast: “Adding Raster Attribute Tables to Rasters in QGIS”  Language(s): English  Time: 4min 32s   Chapters: intro (start-0:06), raster attribute table (0:39-4:24), outro (4:24-end)  https://www.youtube.com/watch?v=No9I3PHofss  

• Reclassify thematic rasters with a lookup table   Hans van der Kwast: “Reclassify Rasters by Table in QGIS”  Language(s): English  Time: 2min    https://www.youtube.com/watch?v=s7KrIjvcCz0  

> QGIS Installation

Do you still need to install QGIS? The QGIS installation and update section explains how to install QGIS on Windows and macOS. 

Useful Links 

QGIS Training Manual

QGIS User Guide

GIS OpenCourseWare

Hans van der Kwast YouTube channel

#QGIS, #Raster data, #Clip, #Attribute table