Book Image

QGIS 2 Cookbook

By : Alex Mandel, Víctor Olaya Ferrero, Anita Graser, Alexander Bruy
Book Image

QGIS 2 Cookbook

By: Alex Mandel, Víctor Olaya Ferrero, Anita Graser, Alexander Bruy

Overview of this book

QGIS is a user-friendly, cross-platform desktop geographic information system used to make maps and analyze spatial data. QGIS allows users to understand, question, interpret, and visualize spatial data in many ways that reveal relationships, patterns, and trends in the form of maps. This book is a collection of simple to advanced techniques that are needed in everyday geospatial work, and shows how to accomplish them with QGIS. You will begin by understanding the different types of data management techniques, as well as how data exploration works. You will then learn how to perform classic vector and raster analysis with QGIS, apart from creating time-based visualizations. Finally, you will learn how to create interactive and visually appealing maps with custom cartography. By the end of this book, you will have all the necessary knowledge to handle spatial data management, exploration, and visualization tasks in QGIS.
Table of Contents (19 chapters)
QGIS 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Hunting for bugs


While QGIS developers do their best to make every QGIS release as stable as possible, sometimes you may encounter bugs or even crashes. To get them fixed in the future, it is necessary to inform the developers about issues.

This recipe shows you how to perform basic debugging and collect information that will help developers understand the problem better and help to fix it.

Getting ready

As the QGIS development process is very quick, bugs that are present in older versions are very likely already fixed in the latest version. So, it is necessary to ensure that you have the most recent QGIS version. If you use the development version of QGIS (so called "nightly" builds), upgrade to the last available build. If you prefer stable releases, then ensure that you have the latest stable version.

How to do it…

  1. Repeat the same actions again using the same data and settings to ensure that this is not an accidental error.

  2. Test your vector data (if any) with geometry checking tools to ensure...