Geodemographics
GDG621S
[9)
Question 6
Answer the following questions regarding catchment profiling methods:
6.1 Define catchment profiling.
(3)
6.2 Define catchment area.
(2)
6.3 There are three different ways of devising a catchment around a particular store or
outlet. List and briefly explain each of them.
(3)
6.4 You want to estimate the catchment area of a store according to the maximum
permitted drive time to the store. Identify by their Row-Column (E.g.A-3) codes, those
pixels belonging to the catchment area of the central store assuming:
• that each pixel represents 20 km x 20 km,
• the average velocity for all the roads is 40 km/h, and
• the maximum allowed travel time from any location to the store is 1 h.
(6)
Justify your answer with calculations.
1 234
A
B
C
D
E
F
G
H
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[14)
First Opportunity Question Paper
Page 4 of 5
June 2022