Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying QGIS 2 Cookbook
  • Table Of Contents Toc
  • Feedback & Rating feedback
QGIS 2 Cookbook

QGIS 2 Cookbook

By : Mandel, Olaya Ferrero, Anita Graser
5 (1)
close
close
QGIS 2 Cookbook

QGIS 2 Cookbook

5 (1)
By: Mandel, Olaya Ferrero, Anita Graser

Overview of this book

QGIS is a user-friendly, cross-platform desktop geographic information system used to make maps and analyze spatial data. QGIS allows users to understand, question, interpret, and visualize spatial data in many ways that reveal relationships, patterns, and trends in the form of maps. This book is a collection of simple to advanced techniques that are needed in everyday geospatial work, and shows how to accomplish them with QGIS. You will begin by understanding the different types of data management techniques, as well as how data exploration works. You will then learn how to perform classic vector and raster analysis with QGIS, apart from creating time-based visualizations. Finally, you will learn how to create interactive and visually appealing maps with custom cartography. By the end of this book, you will have all the necessary knowledge to handle spatial data management, exploration, and visualization tasks in QGIS.
Table of Contents (14 chapters)
close
close
13
Index

Visualizing multispectral layers


Multispectral layers can be rendered in different ways depending on how bands are used. This recipe shows you how to do this and discusses the theory behind it.

Getting ready

Open the landsat.qgs project.

How to do it…

  1. The Landsat image, when opened with the default configuration, looks something like the following screenshot:

  2. Double-click on the layer to open its properties and move to the Style section:

    1. Select the band number 4 in the Red band field.

    2. Select the band number 3 in the Green band field.

    3. Select the band number 2 in the Blue band field.

    Your style configuration should be like the following:

  3. Click on OK.

The image should now look like the following:

How it works…

Colors representing a given pixel are defined using the RGB color space, which requires three different components. A normal image (such as the one you will get from a digital camera) has three bands containing the intensity for each one of these three components: red, green, and blue.

Multispectral...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful

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