Principles of Spatial Interaction
Transportation: movement of goods and people from one place to another Mode: marine, railway, highway Mode: walking, bicycle, bus, LRT, subway
Communication: movement of information from one place to another Medium: voice line, fibre-optic
Spatial interaction = transportation + communication
Spatial Interaction Nodes: point locations
But a set of points may comprise a service area Origins of all people flying out of Lethbridge
County Airport Destinations Viewing or listening area for broadcasting
Routes or route segments joining nodes Flows or volume being moved
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