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Normalising thematic data before mapping means

  • A.arranging the values from smallest to largest
  • B.dividing by a base such as area or population
  • C.removing every value that lies far from the mean
  • D.converting all values into whole numbers

Answer: B

A count divided by a sensible denominator becomes comparable between units of different sizes. The choice of denominator is itself an argument, since crimes per resident and crimes per square kilometre answer different questions.

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