Book Image

Learning QGIS - Third Edition

By : Anita Graser
Book Image

Learning QGIS - Third Edition

By: Anita Graser

Overview of this book

QGIS is a user-friendly open source geographic information system (GIS) that runs on Linux, Unix, Mac OS X, and Windows. The popularity of open source geographic information systems and QGIS in particular has been growing rapidly over the last few years. Learning QGIS Third Edition is a practical, hands-on guide updated for QGIS 2.14 that provides you with clear, step-by-step exercises to help you apply your GIS knowledge to QGIS. Through clear, practical exercises, this book will introduce you to working with QGIS quickly and painlessly. This book takes you from installing and configuring QGIS to handling spatial data to creating great maps. You will learn how to load and visualize existing spatial data and create data from scratch. You will get to know important plugins, perform common geoprocessing and spatial analysis tasks and automate them with Processing. We will cover how to achieve great cartographic output and print maps. Finally, you will learn how to extend QGIS using Python and even create your own plugin.
Table of Contents (13 chapters)
Learning QGIS Third Edition
About the Author
About the Reviewer

Editing vector geometries

Now that we know how to create and select features, we can take a closer look at the other tools in the Digitizing and Advanced Digitizing toolbars.

Using basic digitizing tools

This is the basic Digitizing toolbar:

The Digitizing toolbar contains tools that we can use to create and move features and nodes as well as delete, copy, cut, and paste features, as follows:

  • The Add Feature tool allows us to create new features by placing feature nodes on the map, which are connected by straight lines.

  • Similarly, the Add Circular String tool allows us to create features where consecutive nodes are connected by curved lines.

  • With the Move Feature(s) tool, it is easy to move one or more features at once by dragging them to the new location.

  • Similarly, the Node Tool feature allows us to move one or more nodes of the same feature. The first click activates the feature, while the second click selects the node. Hold the mouse key down to drag the node to its new location. Instead of...