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In which one of the following methods interpolation is used ?

  • A.Choroschematic
  • B.Chorochromatic
  • C.Isopleth
  • D.Choropleth

Answer: C

The method in which interpolation is used is the isopleth method.

Isopleths, such as contours and isohyets, are drawn by interpolating between known values at points to find positions of equal value. Choropleth maps shade whole areal units by their value, and chorochromatic maps colour areas by kind, so neither needs interpolation, and choroschematic maps show areal distribution by symbols and patterns. The isopleth, in contrast, is a continuous surface: a contour is drawn between spot heights by assuming a regular slope between them.

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