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The Douglas-Peucker algorithm is used to

  • A.reproject coordinates between systems
  • B.simplify a line by removing vertices
  • C.place labels without overlapping
  • D.convert a raster layer into polygons

Answer: B

It keeps the points that matter most to the shape and discards those within a stated tolerance of the line between them. Raising the tolerance removes more vertices, which is how the same data serve several display scales.

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