Spike Map

Spikes of (usually) equal width but varying height are centered on geographic areas. They are often used to show abnormally high counts in concentered regions.

Examples

Spike maps in R

Spike maps use the height of spikes to encode data geographically. The format…

Maps of racial population change

Using their peaks and valleys metaphor, The Washington Post shows the shift in…

Coronavirus counts across Europe

Going with the shaded triangle peaks to show case counts and deaths, The…

Animated map for total coronavirus deaths over time

For The New York Times, Lazaro Gamio and Karen Yourish use an animated…

Peaks and valleys of presidential support

This is some fine map work by Lazaro Gamio and Dan Keating for…