The easiest way to show spatial change over time: side by side maps each showing a slice of time.

Time and GIS: Ways of Representing Time on a Map

Spatialtemporal visualization are ways to illustrate changes in an area over time on a map. The famous geographer Immanuel Kant maintained that geography was the study of knowledge in a location, while history was the study of knowledge in time. This article explores different cartographic methods of showing changes in time over space on a map.