A 3-meter by 5-meter map of the United States has a small map scale while a UMN campus map of the same size is large-scale. This description of map scale as large or small can seem counter-intuitive at first. Map makers use the term scale to describe maps as being small-scale or large-scale. For example, it is common to see “one inch represents one kilometer” or something similar written on a map to give map users an idea of the scale of the map. Some maps, especially older ones, use a verbal description of scale. One important advantage of graphic scales is that they remain true when maps are shrunk or magnified. The figure has scale bars for 1 mile, 7000 feet, and 1 kilometer.
Scale bars are graphical representations of distance on a map. This topographic map has an RF of 1:24,000, which means that one unit on the map represents 24,000 units on the ground. Representative fraction and scale bars from a United States Geological Survey (USGS) topographic map. Map scale is represented by a representative fraction, graphic scale, or verbal description. Map scale measures how much the features of the world are reduced to fit on a map or more precisely, map scale shows the proportion of a given distance on a map to the corresponding distance on the ground in the real world. When we visually represent a region of the world on a map, we must reduce its size to fit within the boundaries of the map. The earth’s surface has an area of over 500 million km 2 and any picture of the earth that you can easily carry can only show general outlines of continents and countries.
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