Expressed by the formula: scale = distance on the map/actual distance. There are usually three representations of scales.
(1) number (also called digital scale), where the scale is expressed by proportion or fraction. For example:1:50,000,000 or1/50,000,000.
(2) Line type (also called scale), draw a line segment on the map and indicate the actual distance represented by 1 cm on the map.
(3) Text-based method: directly write down how many meters of field distance 1 cm represents on the map. For example, 1 cm on the map is equivalent to 500 meters on the ground, or one in 50,000.
Extended data:
I. Scale formula
Map distance = actual distance × scale
Actual distance = distance on map/scale.
Proportion = distance on the map ÷ actual distance. (Pay attention to the conversion between units in proportion calculation)
( 1km = 1km = 1x 1000m = 1x 100000cm)
Unit conversion: centimeters on the map, kilometers on the spot, centimeters for kilometers, and five zeros; Kilometers represent centimeters, and two zeros are added to thousands.
Second, classification
1, magnifying scale
Magnification scale and map scale are calculated in the same way. But the magnification ratio refers to the magnification of the distance on the map compared with the actual distance. For example, if a part with the original length of 1cm is drawn on a drawing, the scale of this drawing is 10: 1.
The denominator (the latter term) of the amplification ratio is usually 1. The larger the molecule, the larger the scale, the more detailed the content and the higher the accuracy. (Note: This is an enlarged scale, so the denominator (the latter term) is usually 1)
Step 2 reduce the ruler
The molecule after scaling down (referred to in the preceding paragraph) is usually 1. For example:1:100 (1100)
The expansion ratio (the latter term) is usually 1. For example,100:1(100/1).
Baidu Encyclopedia-Scale