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In the raster data model, the ground is represented as

  • A.a table of features and their attributes
  • B.a regular grid of cells with values
  • C.a set of coordinate pairs joined by lines
  • D.a hierarchy of named administrative units

Answer: B

Every cell covers a fixed patch of ground and carries one value, which suits continuous phenomena such as elevation or reflectance. Sharp boundaries become stepped, since a cell cannot be partly one thing and partly another.

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