Book Image

QGIS By Example

By : Alexander Bruy, Daria Svidzinska
Book Image

QGIS By Example

By: Alexander Bruy, Daria Svidzinska

Overview of this book

Table of Contents (17 chapters)
QGIS By Example
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Step 5 – finding scenic points


Now, we should go through all the observation points and corresponding coverages, adjust their visualization options, and select the point (or points) that provides the best view of the area of interest.

First of all, we need to enumerate the points properly in order to be able to distinguish between them. Follow these steps to do so:

  1. Select Open Attribute Table from the observ_points by right-clicking on the contextual shortcut, or click on the correspondent button from the Attributes toolbar.
  2. Select Open Field calculator from the table toolbar or use the Ctrl + I keyboard shortcut.
  3. In the Field calculator dialog window, activate the Update existing field option, and make sure that the OBJECTID attribute field is selected from the drop-down list, as shown in the following screenshot. This field already contains values that were joined from the building_footprints layer. These values are independent of the point number, and this is why we are using the update...