An Ex-Exercise: Areal Interpolation
This was an exercise (and an old exam question...)
Part A: Ordinal data
Given the two maps below (H=High, M=Medium, L=Low), combine these suitability
scores according to the Case 1 and Case 2 rules described below.
Assign suitabilities (on a Yes/No scale) to the polygons created by the
overlay of the maps above.
Under Case 1, H on either map = Y, else N.
Case 2: H on either or M on both = Y, else N
Did this "ordinal combination" require any particular assumptions?
Describe below:
Part B: Population (count) data p; "areal interpolation"
Estimate the school age population for the three school attendance areas,
using the tract information. In case 1 use the area to allocate school age
population from tracts to schools.
In case 2, use a total population estimate by school attendance area to
guide the estimates.
Answer: school age population using two assumptions
Case 1 Case 2
Jefferson
Franklin
Snoid
Describe the difference between these two procedures. What assumptions
were made?