Map scale. Travel Tips

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Map scale. Travel Tips

Tourist tips

The map - This is a reduced image of the earth's surface. In order to be able to use it, you need to know how many times this image is smaller than the actual one. Each map contains an indication of the scale used in its compilation, which allows its owner to judge the relationship between the length of the line on the map and the length of the corresponding line on the ground. Typically, the scale is indicated both in numerical form as a fraction, and in linear form.

Numerical scale

A numerical scale (for example, 1:50 000) captures the relationship between a line on the map and its corresponding line on the map displayed. So, one unit of length on a map with a scale of 1:50 000 corresponds to 50 thousand of the same units on the ground. In other words, the real world is rendered on a map at one fifty thousandth of its actual size. Thus, 1 cm on a 1:50 000 scale map represents 50 cm (that is, 000 m, or half a kilometer) on the ground.

Linear scale

A linear scale is a simple line or bar divided into units of length (usually kilometers or miles). You can measure the distance between two points on the map using a measuring compass (or by aligning the edge of the sheet with both points and marking the distance between them on the map with a pencil), which is then superimposed on a linear scale with reading the value of the real distance on the ground in the usual units of distance measurement.

How to go from a numerical scale to a linear one

The scale shows how many times the actual distances on the ground are reduced on the map. If we discard the last two zeros in the denominator of the numerical scale, then the remaining number will show how many meters are contained in one centimeter of the map. Therefore, in order to move from a numerical scale to a scale value, it is necessary for maps drawn up in metric measures to divide the denominator by 100 (the number of centimeters in 1 m), and for maps drawn up in old Russian measures, divide the denominator by 84 (the number of inches in 1 sazhen).

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