Book Image

Mastering Geospatial Development with QGIS 3.x - Third Edition

By : Shammunul Islam, Simon Miles, Kurt Menke, GISP, Richard Smith Jr., GISP, Luigi Pirelli, John Van Hoesen, GISP
Book Image

Mastering Geospatial Development with QGIS 3.x - Third Edition

By: Shammunul Islam, Simon Miles, Kurt Menke, GISP, Richard Smith Jr., GISP, Luigi Pirelli, John Van Hoesen, GISP

Overview of this book

QGIS is an open source solution to GIS and widely used by GIS professionals all over the world. It is the leading alternative to 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 and getting you acquainted with the latest QGIS 3.6 updates, this book will take you all the way through to teaching you how to create a spatial database and a GeoPackage. Next, you will learn how to style raster and vector data by choosing and managing different colors. The book will then focus on processing raster and vector data. You will be then taught advanced applications, such as creating and editing vector data. Along with that, you will also learn about the newly updated Processing Toolbox, which will help you develop the advanced data visualizations. The book will then explain to you the graphic modeler, how to create QGIS plugins with PyQGIS, and how to integrate Python analysis scripts with QGIS. By the end of the book, you will understand how to work with all aspects of QGIS and will be ready to use it for any type of GIS work.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Choosing and managing colors


As colors are used throughout the styling process, we will first review the ways in which you can select and manage color collections in QGIS. In the Symbology tab window (via the Layer Properties), do a single click on the color that is displayed next to the word color to access the Select Color window.

Alternatively, you can access a cut-down version of the same display by clicking on the down arrow at the end of the color selection, which is shown in the following screenshot:

Accessing this slimmed-down version on the Select Color window gives you access to copy and paste colors. This is useful if you want to copy/paste colors between layers/features. If you click on Choose Color..., you can again access the Select Color window.

This will open the color picker tool, as shown in the following screenshot:

Let's take a tour of the color picker tool by starting with the components that are always available and conclude our tour by looking at the four changeable panels...