The measurement of a geographical area can be carried out on a map.

**Measurement
of Area**

The measurement of a geographical
area can be carried out on a map. There are number of methods used to measure
area on a map. One of the simplest methods is by means of similar squares.

Square method: The square method is
the most common method to measure area. In this method, the area to be measured
is covered by squares by placing a sheet of graph paper beneath the map on an
illuminated tracing table or by tracing the area onto the graph sheet. The
squares pertain to a scale.

**Example:**

Calculate the area of the given map
whose scale is 1 centimetre 5 1 kilometre cover the given area with a set of
squares of side.

Area of 1 small square 5 1 km^{2}

**Step 1:
**Count the number of
full squares** **first 5 10 (shaded green) 1 small square 5 1 cm^{2}

**Step 2:
**Next, count the
numbers of the** **fractional squares square (yellow) 5 4, square (pink) 5 2 and ¼ square
(blue) 5 8)

**Step 3:
**Calculate the total
number of** **squares 10

(10 3 1 5**10**,

Number of 3/4 square

4 3 3/4 5 **3**

Number of 1/2 squares

3 1/25 **1** and number of 1/4 squares 8 3 1/4 5 **2**)

**Step 4:
**Add all these
values

(**10** 1 **3** 1 **1** 1 **2** 5 **16** squares) **Step 5: **Multiply 16 with the scale of the map

16 3 1 km^{2} 516 km^{2}

**Hence
the area of the given place is **5** 16 square Km.**

**Example:**

Measure the given area using square
method: scale is 1 centimetre 5 1 kilometre (area of one small square 5 1
square Km ) Solution:

**Step 1:
**Count the number of
full squares** **first 5 11

**Step 2:
**Next, count the
numbers of the** **fractional squares

¾ square 5 2,

square 5 4 and ¼ 5 2

**Step 3:
**Calculate the total
number of** **squares

(11 3 1 5 11

Number of 3/4 square:

3 3/4 5 1.5

Number of 1/2 squares:

3 1/25 2 and number of 1/4 squares:

2 3 1/4 5 0.5) **Step 4:
**Add all these
values

(**11** 1 **1.5** 1 **2** 1 **0.5** 5 **15** squares) **Step 5: **Multiply 15 with the scale of the map

15 3 1 515 km^{2}

**Hence
the area of the given place is **5** 15 square Km.**

Tags : Geography , 11th Geography : Chapter 9 : Maps and Scale

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11th Geography : Chapter 9 : Maps and Scale : Measurement of Area | Geography

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