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

Creating beautiful effects with inverted polygon shapeburst fills


The inverted polygon renderer can be used in combination with a shapeburst fill to create some beautiful effects. Next, you will see two examples of this in a single map covering Baltimore City, Maryland. You will begin by opening the Baltimore.qgs project. The data focuses on diabetes in Baltimore City neighborhoods:

Creating coastal vignettes

It's already a fairly nice map, but there is no data representing the harbor and Chesapeake Bay. It is simply a white hole in the data layers. To make it blue, you could click on Project | Project Properties and change the background color of the map to blue. However, let's learn a more powerful way to represent this feature:

  1. Right-click on the MD_County_boundaries layer and choose Duplicate. A second copy of the layer will appear in Layers Panel.
  2. Drag the new copy so that it is between the Neighborhood_diabetesandBaltimore City Boundarylayers in theLayers Panel, and turn the layer on.

We...