1. The document defines different types of regions including formal, functional, perceptual, administrative, policy, and regions based on economic development or activities.
2. Formal regions are uniform areas where residents share common attributes. Functional regions are defined by economic interdependence and flows between places. Perceptual regions reflect cultural identity.
3. Regions can also be defined based on the perspective of planners and include macro, meso, and micro levels. Macro regions cross state boundaries while micro regions are usually administrative units like districts.