This book, "Mastering Geospatial Development with QGIS 3.x", is your comprehensive guide to becoming skilled in QGIS, an open-source GIS software. Covering functionalities of QGIS 3.4 and 3.6, you will advance your knowledge in spatial data analysis, styling, and spatial database management through practical examples and in-depth discussions. What this Book will help me do Understand the latest features and updates in QGIS 3.6. Master spatial data styling for impactful geographic visualizations. Learn to create and manage spatial databases and GeoPackages. Automate workflows using QGIS's graphical modeler and Python scripting. Develop custom QGIS plugins to extend its capabilities. Author(s) This book is written by a team of GIS experts with extensive experience in spatial data analysis and QGIS. Authors include professionals with GISP credentials who have taught GIS at various levels. With their deep understanding of QGIS and practical teaching approach, they aim to make premium GIS knowledge accessible to all. Who is it for? The book is ideal for GIS professionals seeking to enhance their QGIS expertise. Beginners looking to establish a firm foundation in GIS and QGIS will also benefit. Developers interested in extending QGIS capabilities using Python will find invaluable guidance here. Whether for career growth, project management, or academic purposes, this book suits users aspiring to excel in geospatial development.