SPATIAL DIFFUSION
- The process by which a concept, practice, or substance spreads from its point of origin to new territories
- Two types
- Relocation diffusion
- Expansion diffusion
- RELOCATION DIFFUSION
- Sequential diffusion is the process in which items being diffused are transmitted by their carrier agents as they evacuate the old areas & relocate to new areas.
- The most common form of relocation diffusion involves the spreading of innovations by a migrating population.
- RELOCATION DIFFUSION (SCHEMATIC)
- EXPANSION DIFFUSION
- The spreading of an innovation or idea through a fixed population in such a way that the number of those adopting grows continuously larger, resulting in an expanded area of dissemination
- Two types
- Contagious Expansion
- Hierarchical Expansion
- CONTAGIOUS EXPANSION
- The distance-controlled spreading of an idea, innovation, or some other item through a local population by contact from person to person
- Analogous to the communication of a contagious disease
- CONTAGIOUS EXPANSION (SCHEMATIC)
- HIERARCHICAL EXPANSION
- A form of diffusion in which an idea or innovation spreads by "trickling down" from larger to smaller adoption units
- An urban hierarchy is usually involved, encouraging the leapfrogging of innovations over wider areas, with geographic distance a less important factor.
- HIERARCHICAL EXPANSION (SCHEMATIC)
- DIFFUSION OF ISLAM (MAP)
