GEOG 1HB3 Lecture Notes - Distance Decay
3 Feb 2014
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Document Summary
Spatial interaction is the amount/level of movement or communication between two locations: everything is related to everything else, but near things are more related than distant things. Distance decay is how the level or interaction declines as distance increases: friction of distance is distance that has a retarding effect on interactions. (time, money, etc) The higher the accessibility/connectivity, the lower the friction of distance. Gravity models measures the quantity of movement or interaction between two places. (relative sizes, distances, distance-decay function) The attraction between two objects is proportional to their mass, and inversely proportional to their respective distance. Spatial diffusion is the process by which a characteristic spreads across space, from one location to another, over time. (distance, friction of distance) Relocation diffusion is the spread of an idea or characteristic though the physical movement of people from one location to another. (currency, immigrants)
