The Mapping Revolution

For most of history, mapping required physical exploration — someone had to walk, sail, or fly over terrain. Today, satellites capture images sharp enough to see individual cars. Remote sensing makes it possible to map places no human has ever visited, from ocean floors to Mars.

The revolution accelerated with Geographic Information Systems — software that layers many kinds of data onto one map. Population, roads, elevation, and weather can all be shown together. GIS turned maps from static images into dynamic analytical tools for planners and scientists.