It is so difficult to show the actual shape and size of an object on a page of the paper. So, it should be shown using the scale. Obviously, this helps greatly to find out the actual shape and size of an object. In the map, one metre can be represented by one centimetre. The scale can be expressed in three different ways :-
The area of my house is:
Length of my house (l) = 20m
Width of my house (b) = 5m
The area of my house (A) = ?
A= l x b= 20 x 5 = 100m2.Therefore, the area of my house is 100m2.
Map is the representation of whole or some parts on the earth or any other parts, or objects found in any body of universe on a flat sheet of paper with appropriate scale and color (so that each of the point in the map can show the real difference in location of any objects).
There is no field of study where there is no use for map. Map expresses a lot of spatial information through graphics that is easy to extract and understand. It’s relationship in combination with social attributes. Moreover, it helps to understand the problems and prospects of an area in terms of resources, infrastructures, etc. maps present multiple layers of information simultaneously; so we can compare different variables quickly. That is why it is said that picture is worth thousand words.