Figure GT.2

Spatial scale. Our perspective on the Namib Desert in southwestern Africa changes as spatial scale changes. Different spatial scales reveal different geographic patterns and processes and stimulate different kinds of questions. Images 3 and 4 are both developed from satellites.

(1. Johnny Haglund/Lonely PlanetImages/Getty Images; 2. imagebroker.net/SuperStock; 3. NASA; 4. NASA)