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Which of the following statements is correct regarding the map scale? I. Representative fraction method of representing the scale is completely independent of unit of measurement. II. Vernier scale and diagonal scale are types of map scales.

Which of the following statements is correct regarding the map scale? I. Representative fraction method of representing the scale is completely independent of unit of measurement. II. Vernier scale and diagonal scale are types of map scales. Correct Answer Both I and II

The ratio of a distance on the map to the comparable distance on the ground is the scale of a map. The curvature of the Earth's surface complicates this simple notion, forcing scale to fluctuate throughout a map.  Important Points

  • A way of scale is stated as a fraction on a map or plan that shows the ratio between a unit distance on the map or plan and the distance measured in the same units on the ground.
  • Hence, it is independent of any unit of measurement.
  • On a graded scale, a vernier scale is a device for measuring accurately the fractional portion of the smallest division.
  • Diagonal Scale is a scale in which minor parts are divided into smaller parts by using diagonals.
  • The formula for calculating the value, which should of course have the same unit of measurement, is Scale = Map distance ÷ Distance on the ground.
  • Scale Factor = Distance on the ground ÷ Map distance.
  • A representative fraction is a type of scale representation that visually looks very similar to a representative fraction (RF).  However, representative fraction avoids the use of units in detailing the scale of a map. 
  • For example, a scale that has an RF of 1:100 means that every one unit on the map equals one hundred of the same units on the ground.  

​Therefore, both statements I and II are correct regarding the map scale.

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