Did These Borders Change?
An interactive atlas of how political geography changed over time. Geography is the base
layer and time is the fourth dimension: move the timeline and borders and names change
with it. The default dataset records world political boundaries at 53 dates between
123,000 BC and 2010 AD — about 2,900 polities and 5,300 distinct territorial states.
The dataset records snapshots, not continuous change. An interval between
two observations is an inference, and every feature says so rather than implying a border
was known to have held throughout.
The map needs JavaScript and WebGL. Every place in it is also published as a page you can
read without either:
Boundaries from
Historical Basemaps, GPL-3.0.