Classification of South African municipalities according to the Municipal Infrastructure Investment Framework model.
  A: metropolitan municipalities
  B1: local municipalities containing secondary cities
  B2: local municipalities with a large town as core
  B3: local municipalities with relatively small populations and a significant proportion of urban population but with no large town as core
  B4: local municipalities which are mainly rural with, at most, one or two small towns in their area
Based on File:South Africa municipalities 2016 blank.svg; classification data downloaded from https://municipaldata.treasury.gov.za/api/cubes/municipalities/members/municipality
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