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A dasymetric map improves on a simple area-shaded map by

  • A.converting every areal unit into a point symbol
  • B.reprojecting the data onto an equal-area frame
  • C.using ancillary data to refine the boundaries
  • D.increasing the number of classes in the legend

Answer: C

Knowledge of where people cannot live, such as lakes or industrial land, lets the mapper redistribute a unit's value onto the ground that actually carries it. The result respects real limits rather than the arbitrary administrative outline.

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