1. Themes and Models of Services
AP Human Geography
Urban Land Use Unit

2. For today, 04/20 Chapter 12 Reading Quiz is TODAY! 
After the quiz, you will need your notes – we will be discussing the Themes and Models of Services

3. Development and Tertiary Employment

4. Types of Services Consumer Services: provides services to customers
Examples: retail, education, health, leisure & hospitality
Business Services: facilitate other businesses
Examples: financial, professional, transportation
Public Services: provide security and protection
Examples: police, government

5. Specialization of Services
Cancun, Mexico Las Vegas, USA

6. U.S. Growth
Since the 1970s, U.S. has seen a decrease in the secondary sector and a sharp increase in the tertiary sector.

7. Clustering of Services
Central Business District (CBD)
3 main types of services: high threshold, high range, servicing CBD workers
Compact: small % of area, large % or services
Visually distinctive
One of oldest parts
High land costs lead to
skyscrapers

8. Christaller’s CPT showed that:
(1.) Larger a settlement, fewer there are
(2.) Larger a settlement, farther away a similar size settlement is
(3.) Range increases as the population increases
(4.) The larger the settlement, the higher the order of its services
(5.) Exceptions exist: tourist resort and dormitory town
Small pop, many functions & large pop, few functions

9. GM predicts the optimal location of a service is:
The Gravity Model
GM predicts the optimal location of a service is:
(1.) Directly related to population
- higher population = more potential customers
(2.) Inversely related to range
- farther away = less likely to use

10. OPEC Share of World Oil Reserves, 2013