Learning QGIS - Third Edition by Anita Graser

Author:Anita Graser [Graser, Anita]
Language: eng
Format: azw3, pdf
Publisher: Packt Publishing
Published: 2016-03-09T16:00:00+00:00

After you click on OK, the selected statistics are appended to the polygon layer attribute table, as shown in the following screenshot. We can see that Big Mountain AFS is the airport with the highest mean elevation among the four airports that fall within the extent of our elevation raster:

Creating a heatmap from points

Heatmaps are great for visualizing a distribution of points. To create them, QGIS provides a simple-to-use Heatmap Plugin, which we have to activate in the Plugin Manager, and then we can access it by going to Raster | Heatmap | Heatmap. The plugin offers different Kernel shapes to choose from. The kernel is a moving window of a specific size and shape that moves over an area of points to calculate their local density. Additionally, the plugin allows us to control the output heatmap raster size in cells (using the Rows and Columns settings) as well as the cell size.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.