Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Building Mapping Applications with QGIS
  • Table Of Contents Toc
  • Feedback & Rating feedback
Building Mapping Applications with QGIS

Building Mapping Applications with QGIS

By : Westra
4.6 (9)
Buy this Book
close
close
Building Mapping Applications with QGIS

Building Mapping Applications with QGIS

4.6 (9)
By: Westra
Buy this Book

Overview of this book

If you are an experienced Python developer who wants to create your own geospatial applications with minimum fuss, this is the book for you. While some familiarity with mapping applications would be an advantage, no prior knowledge of geospatial concepts is required. Even if you've never used QGIS before, this book will quickly get you up to speed.
Table of Contents (11 chapters)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
1. Getting Started with QGIS
Icon
1. Getting Started with QGIS
Icon
About QGIS
Icon
Linking QGIS and Python
Icon
Summary
2
2. The QGIS Python Console
Icon
2. The QGIS Python Console
Icon
Using the console
Icon
Working with geospatial data in the console
Icon
Scripting the QGIS user interface
Icon
Summary
3
3. Learning the QGIS Python API
Icon
3. Learning the QGIS Python API
Icon
About the QGIS Python APIs
Icon
Deciphering the C++ documentation
Icon
Organizing the QGIS Python libraries
Icon
Using the PyQGIS library
Icon
Summary
4
4. Creating QGIS Plugins
Icon
4. Creating QGIS Plugins
Icon
Getting ready
Icon
Understanding the QGIS plugin architecture
Icon
Creating a simple plugin
Icon
The plugin development process
Icon
Writing a useful plugin
Icon
Possibilities and limitations of plugins
Icon
Summary
5
5. Using QGIS in an External Application
chevron up
Icon
5. Using QGIS in an External Application
Icon
Introducing Lex
Icon
Getting the data
Icon
Designing the application
Icon
Creating the application's framework
Icon
Adding the user interface
Icon
Connecting the actions
Icon
Creating the map canvas
Icon
Labeling the points
Icon
Filtering the landmarks
Icon
Implementing the zoom tool
Icon
Implementing the pan tool
Icon
Implementing the explore mode
Icon
Further improvements and enhancements
Icon
Summary
6
6. Mastering the QGIS Python API
Icon
6. Mastering the QGIS Python API
Icon
Working with symbol layers
Icon
Combining symbol layers
Icon
Implementing symbol layers in Python
Icon
Implementing renderers in Python
Icon
Working with custom map layers
Icon
Creating custom map canvas items
Icon
Using memory-based layers
Icon
Summary
7
7. Selecting and Editing Features in a PyQGIS Application
Icon
7. Selecting and Editing Features in a PyQGIS Application
Icon
Working with selections
Icon
Using the layer editing mode
Icon
Adding Points
Icon
Editing Points
Icon
Deleting Points and other features
Icon
Adding lines and polygons
Icon
Editing lines and polygons
Icon
Summary
8
8. Building a Complete Mapping Application using Python and QGIS
Icon
8. Building a Complete Mapping Application using Python and QGIS
Icon
Introducing ForestTrails
Icon
Designing the ForestTrails application
Icon
Creating the application
Icon
Obtaining the basemap
Icon
Defining the map layers
Icon
Defining the map renderers
Icon
The Pan Tool
Icon
Implementing the track editing mode
Icon
Summary
9
9. Completing the ForestTrails Application
Icon
9. Completing the ForestTrails Application
Icon
The Add Track map tool
Icon
Testing the application
Icon
Vertex snapping
Icon
The Edit Track map tool
Icon
The Delete Track map tool
Icon
The Get Info map tool
Icon
The Set Start Point and Set End Point actions
Icon
The Find Shortest Path action
Icon
Adjusting the toolbar actions
Icon
Suggested improvements
Icon
Summary
10
Index
Icon
Index

Chapter 5. Using QGIS in an External Application

In Chapter 1, Getting Started with QGIS, we looked briefly at a standalone Python program built using PyQt and the PyQGIS library. In this chapter, we will use the same technique to build a complete turnkey mapping application using PyQGIS. Along the way, we will:

  • Design and build a simple but complete standalone mapping application
  • Learn how to use a wrapper script to handle the platform-specific dependencies before our Python program is run
  • Define our application's user interface in a separate Python module so that we keep our UI separate from the application's business logic
  • Dynamically show and hide map layers based on the user's preference
  • Learn how to use a rule-based renderer to selectively display features based on the map's current zoom level
  • See how data-defined properties can be used to calculate the font size to use for a label based on the feature's attributes
  • Implement Google Maps style panning and...
Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Building Mapping Applications with QGIS
End of Section 5
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon