Understanding map scale
Scale is
the relationship between the size of features on a map and the size of the
corresponding objects in the real world. Scale is commonly expressed as a
ratio, or representative fraction, such as 1:24,000. This scale means one unit
on the map is equal to 24,000 units on the earth. Another way of thinking about
it is that the objects on the earth are 24,000 times larger than the features
on the map which represent them.
You will
commonly see references to two types of maps: large-scale and small-scale.
Generally, a large-scale map, such as a map of city streets or a building plan,
covers a small area in more detail. A small-scale map, such as a world map,
covers a large area in less detail.
The map on the left is displayed at
a larger scale than the map on the right. On the left, you see a small area of
the earth's surface (the city of