By Kurt Menke, GISP

Go past the fundamentals and unharness the whole strength of QGIS with functional, step by step examples

About This Book

  • This booklet is your one-stop approach to your whole GIS wishes utilizing the open resource QGIS
  • Master QGIS through studying approximately database integration, geoprocessing instruments, Python scripts, complex cartography, and customized plugins
  • This example-rich, sensible consultant can assist you create subtle analyses and maps

Who This ebook Is For

If you're a GIS expert, a expert, a scholar, or even a speedy learner who desires to transcend the fundamentals of QGIS, then this ebook is for you. it's going to arrange you to gain the complete strength of QGIS.

What you'll Learn

  • Create and deal with a spatial database
  • Get to grasp complicated ideas to type GIS data
  • Prepare either vector and raster facts for processing
  • Add warmth maps, reside layer results, and labels in your maps
  • Master LAStools and GRASS integration with the Processing Toolbox
  • Edit and service topological info errors
  • Automate workflows with batch processing and the QGIS Graphical Modeler
  • Integrate Python scripting into your information processing workflows
  • Develop your personal QGIS plugin

In Detail

QGIS is an open resource strategy to GIS. it really is favourite by way of GIS execs around the world. it's the major replacement to the proprietary GIS software program. even if QGIS is defined as intuitive, it's also by means of default complicated. realizing which instruments to take advantage of and the way to use them is vital to generating worthy deliverables on time.

Starting with a refresher at the QGIS fundamentals, this e-book will take you all through to making your first customized QGIS plugin. From the refresher, we'll recap how one can create, populate, and deal with a spatial database. you are going to additionally stroll via styling GIS information, from growing customized symbols and colour ramps to utilizing mixing modes. within the subsequent part, you'll find how you can arrange vector, warmth maps, and create dwell layer results, labeling, and raster facts for processing. you are going to additionally notice complex facts construction and enhancing techniques.

The final 3rd of the ebook covers the extra technical facets of QGIS similar to utilizing LAStools and GRASS GIS's integration with the Processing Toolbox, the best way to automate workflows with batch processing, and the way to create graphical versions. ultimately, one can find tips to create and run Python facts processing scripts and write your personal QGIS plugin with pyqgis.

By the top of the ebook, you are going to know how to paintings with all of the facets of QGIS, and may be capable to use it for any form of GIS work.

Style and approach

This step by step accomplished advisor allow you to dig your tooth into operating with spatial databases, growing your personal QGIS plugins, and developing your individual customized graphical models.

Show description

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Additional resources for Mastering QGIS

Sample text

DB Manager provides a simple graphical interface to manage PostGIS and SpatiaLite databases. Using DB Manager, we will be able to view and manage our SpatiaLite database. Let's start by getting familiar with the DB Manager interface. 1. Click on DB Manager under Database to open the DB Manager. The DB Manager interface (as shown in the following screenshot) is composed of four parts: menu bar, toolbar, tree view, and information panel. [ 31 ] Creating Spatial Databases 2. sqlite to see a tree listing of all tables, views, and general information about the database, as shown in in the following screenshot: When a new SpatiaLite database is created, it is automatically populated with multiple tables and views.

The Join Layer and Join Field values represent the standalone table. The Target Field value is the column in the attribute table on which the join will be based. Although in this example the join field and the target field have the same name, this is not a requirement. The two fields merely need to hold the same unique ID. 5. At this point, you can choose Cache the join in virtual memory, Create attribute index on the join field, and Choose which fields are joined. The last option lets you to choose which fields from the join layer to append to the attribute table.

The Join Layer and Join Field values represent the standalone table. The Target Field value is the column in the attribute table on which the join will be based. Although in this example the join field and the target field have the same name, this is not a requirement. The two fields merely need to hold the same unique ID. 5. At this point, you can choose Cache the join in virtual memory, Create attribute index on the join field, and Choose which fields are joined. The last option lets you to choose which fields from the join layer to append to the attribute table.

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