Distribution

• Density
  • Arithmetic density versus Physiological density
    
    
• Concentration
  • see ( Earth lights from Space)
    
    
• Patterns - Jet traffic
  
  

What is a Region?

• Formal - people share one or more common characteristic
  
  
• Functional - region has center "node" or focal point
  
  
• Vernacular - perceptual region (e.g. the deep South)
  
  

Concept of Diffusion - how people and cultural traits (language, religion, ideas, etc.) spread?

• Hearth - a region from which people and innovations (trends) originate
  
  
• Relocation diffusion
  
  
• Expansion diffusion