August 20
Traquair
Chapter 1
BW:
• What is a movie, TV show, or
book that someone has recently
recommended to you?
• Who recommended it?
• How did they tell you? (text,
email, advertisement, in person?)
Agenda:
• Notes: Diffusion
• HW: Read/Notes, PHYSICAL
MAP DUE TOMORROW
Objective:
• You will be able to explain
how technology,
population, and distance
effect interaction between
places.
TUBI
• Why is Russia so big?
I. Movement of Ideas
A. Diffusion: how something
spreads across space over
time
1. Hearth: birthplace of an
idea or item
2. Diffusion only works if the
characteristic is accepted
by the new place
3. The Laws of Diffusion
a. Law of the Few – ideas/items end
up diffused because of the efforts
of a few well connected people
b. Stickiness Factor – How well the
idea resonates with the new place
c. Power of Context – Needs to be
the right time/place
4. Two types: Relocation and
Expansion Diffusion
a. Relocation Diffusion:
When an idea spreads
because people move
from place to place.
– Example: Language
b. Expansion Diffusion:
movement of a characteristic
across space, independent of
human movement
a. Hierarchical Diffusion: Idea comes
from people or places of
power/influence
– Reverse Hierarchical Diffusion:
starts in obscure places and works
its way into power
• Example: Tea Party
b. Contagious Diffusion: Fast
spread of an idea
throughout a population
c. Stimulus Diffusion: spread of
the underlying idea, not the
specific one
Discuss
• Come up with your own example
of each form of diffusion.
• Write these in your notes as
Geographic connections!
B. Interaction
1. Tobler’s First Law: It’s easier
to interact with each other
when we are close to each
other, we interact with
things far away less
2. Friction of Distance:
interaction goes down the
greater the distance
– Distance Decay
3. Space-Time
Compression: how
long it takes for a
person or idea to get
from one place to
another has gone
down as technology
improves
4. Gravity Model
a. An equation to measure the
interaction between to places
Iij =PiPj
2
Dij
I = level of interaction
P = population
D = distance
i = place 1
j = place 2
Practice
• Phoenix – 3,629,114
• Tucson – 843, 168
• Bisbee – 5,360
• Distance between:
– P & T = 110 miles
– T & B = 78 miles
Practice
• Los Angeles – 13,262,220
• Chicago – 9,554,598
• New York– 20,092,883
• Distance between:
– LA & C = 1,742 miles
– LA & NY= 2,449 miles
Practice – PICK 2 CITIES
•
•
•
•
•
•
New York City
San Francisco
Los Angeles
Chicago
Phoenix
Tucson
•
•
•
•
•
Bisbee
Yuma
Las Vegas
London
Beijing
Summary
• Define diffusion.
• Describe an example for two
different kinds of diffusion.
• Explain how technology,
population, and distance effect
interaction between places.