In what ways is the scale represented on a map? -SST 10th

In what ways is the scale represented on a map? -SST 10th
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Representation of Map Scale: Map scales are represented in the three forms: (i) A Statement: This is the easiest method of describing a map scale. It is usually written on maps as 1 cm., to 10 km. (ii) A Ratio: In this method the map scale is expressed as a numeric ratio. The numerator represents the map distance and it is always expressed as a unit. The denominator represents the corresponding ground distance, i.e., one unit on the map is equivalent to a number of units on the ground. It is also known as ratio-scale or Representative Fraction (R.F.) (iii) A Graph: In this method, scale is represented by means of a linear (line) graph. It consists of a straight line divided into a number of equal parts (primary and secondary) which are marked to show what these divisions represents on the actual ground.
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