Book Image

Mastering QGIS - Second Edition

By : Kurt Menke, GISP, Paolo Corti, Richard Smith Jr., GISP, Luigi Pirelli, John Van Hoesen, GISP
Book Image

Mastering QGIS - Second Edition

By: Kurt Menke, GISP, Paolo Corti, Richard Smith Jr., GISP, Luigi Pirelli, John Van Hoesen, GISP

Overview of this book

QGIS is an open source solution to GIS. It is widely used by GIS professionals all over the world. It is the leading alternative to the proprietary GIS software. Although QGIS is described as intuitive, it is also by default complex. Knowing which tools to use and how to apply them is essential to producing valuable deliverables on time. Starting with a refresher on the QGIS basics, this book will take you all the way through to creating your first custom QGIS plugin. From the refresher, we will recap how to create, populate, and manage a spatial database. You’ll also walk through styling GIS data, from creating custom symbols and color ramps to using blending modes. In the next section, you will discover how to prepare vector, heat maps, and create live layer effects, labeling, and raster data for processing. You’ll also discover advanced data creation and editing techniques. The last third of the book covers the more technical aspects of QGIS such as using LAStools and GRASS GIS’s integration with the Processing Toolbox, how to automate workflows with batch processing, and how to create graphical models. Finally, you will see how to create and run Python data processing scripts and write your own QGIS plugin with pyqgis. By the end of the book, you will understand how to work with all the aspects of QGIS, and will be ready to use it for any type of GIS work.
Table of Contents (19 chapters)
Mastering QGIS - Second Edition
Credits
Foreword
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Styling singleband rasters


In this section, the three different band render types that are appropriate for singleband rasters will be covered. Singleband rasters can be styled using three different band render types: paletted, singleband gray, and singleband pseudocolor.

Note that even though raster color rendering and resampling are part of raster style properties, they will be discussed separately in later sections as they are common to all singleband and multiband raster renderers.

Tip

The raster band render type should be chosen to best match the type of data. For instance, a palette renderer is best used on rasters that represent discrete data, such as land use classes. The singleband gray would be a good choice for a hillshade, while a singleband pseudocolor would work well on a raster containing global temperature data.

Paletted raster band rendering

The paletted raster band renderer applies a single color to a single raster value. QGIS supports the loading of rasters with paletted colors...