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- The ratio on a map of the distance
between two points on the ground and the same two points on the map. It may be expressed
in three ways:
Fractional scale
If two points are 1 km apart in the field, they may
be represented on the map as separated by some fraction of that distance, say, 1 cm. In
this instance, the scale is 1 cm to the kilometer. There are 100,000 cm in 1 km; so this
scale can be expressed as the fraction, or ratio, 1:100,000. Many topographic maps of the
United States Geological Survey have a scale of 1:62,500; and many recent maps have a
scale of 1:31,250, and others of 1:24,000.
Graphic scale
This scale is a line printed on the map and divided
into units that are equivalent to some distance, such as 1 km or 1 mi.
Verbal scale
This is an expression in common speech, such as
"four centimeters to the kilometer," "an inch to a mile," or "two
miles to the inch."
Source: Leet, L. Don. 1982.
Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
- a. The ratio between linear distance on a map, chart, globe, model, or
photograph and the corresponding distance on the surface being mapped. It
may be expressed in the form either of a direct or verbal statement using
different units (e.g., 1/24,000 or 1: 24,000, indicating that one unit on
the map represents 24,000 identical units on the ground) or a graphic
measure (such as a bar or line marked off in feet, miles, or kilometers).
AGI
b. Loose, thin fragments of rock, threatening to break or fall from the
roof or wall of a mine. To remove such fragments.
c. Crude paraffin wax, obtained by filtering the cooled heavy distillation
from petroleum or shale. Standard, 2
d. A fault, in glass or vitreous enamelware, in the form of an embedded
particle of metal oxide or carbon. Dodd
e. Newc. A small portion of air abstracted from the main current. Also
called scale of air, and sometimes spelled skail.
f. To regulate the air current in a roadway. BS, 8
g. Used among English miners for carbonaceous shale interbedded with thin
layers of coal. Tomkeieff
h. The flakes and rubble that fall in after the ore has been removed.
Gordon
Source:
Dictionary of Mining, Mineral, and Related Terms
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