3.6. Kernel density

A useful tool to visualize the density of a point layer it is the Heatmap. In QGIS, we can directly use a styling option of the layer.

  • Right-click the places_clip layer on the Layers panel

  • Select Properties

  • In the menu on the left, select “Symbology”

../_images/3.6_simbology.PNG

  • In the dropdown menu on top, select Heatmap

../_images/3.6_simbology_heatmap.PNG

  • Now you only have to choose the parameters:

    • Color ramp: reds

    • Radius and radius unit of measure: 10 millimetres

    • Maximum value (leave Automatic)

../_images/3.6_heatmap_parameters.PNG

  • Then click OK button on the bottom

The result is the visualization of the places layer as a heatmap:

../_images/3.6_heatmap_result.PNG

Fig. 3.6.1 Comparison between the heatmap and a copy of the places_clip layer with the point symbology