Economic GeographyPart II

InteractionTransportationThe City, Services and Central Place Theory

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

DC-117 Autoparts, Toronto-Nashville

Trail drive

Rail-based meat distribution, reefer

3

Semitrailer cattleliner

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

Why do things move?The Bases for Spatial Interaction Complementarity

Complementary resource endowments Form utility Place utility

Transferability Ease of transferance and ability to overcome

distance Distance decay and umland