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Graphical Representation Of Data
What is an isopleth map? How an interpolation is carried out?
An imaginary line which joins the places of equal values is referred as isopleth. These include isotherms, isobars, isohytes, isonephs, isohets, contours etc.
Interpolation is carried out in the following method:
1. Firstly determine the minimum and maximum values given on the map.
2. Calculating the range of value.
3. Based on range determine the interval in a whole number like 5, 10, 15, etc.
4. The exact point of drawing an isopleth is determined by using following formula :
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What are the requirements to construct a dot map?
Describe the method of constructing a traffic flow map.
What is an isopleth map? How an interpolation is carried out?
Describe and illustrate important steps to be followed in preparing a choropleth map.
Discuss important steps to represent data with the help of pie-diagram.
Represent the following data with the help of suitable diagram:
|
Year |
1911 |
1921 |
1931 |
1941 |
1951 |
1961 |
1971 |
1981 |
1991 |
2001 |
|
Decimal Growth (%) |
0.35 |
8.27 |
19.12 |
31.97 |
41.42 |
26.41 |
38.23 |
46.14 |
36.47 |
31.13 |
Represent the following data with the help of suitable diagram:
India: Literacy and Enrolment Ratio in Primary and Upper Primary Schools
|
Year |
Literacy Ratio |
Enrolment |
Enrolment Ratio |
||||||
|
Ratio Primary |
Upper Primary |
||||||||
|
Person |
Male |
Female |
Boys |
Girls |
Total |
Boys |
Girls |
Total |
|
|
1950-51 |
18.3 |
27.2 |
8.86 |
60.6 |
25 |
42.6 |
20.6 |
4.6 |
12.7 |
|
1999-2000 |
65.4 |
75.8 |
54.2 |
104 |
85 |
94.9 |
67.2 |
50 |
58.8 |
Represent the following data with the help of a pie-diagram:
Land-use: 1983–84
|
1950-51 |
1998-2001 |
|
|
Net Sown Area |
42 |
46 |
|
Forest |
14 |
22 |
|
Not available for cultivation |
17 |
14 |
|
Fallow Land |
10 |
8 |
|
Pasture and Tree |
9 |
5 |
|
Culturable Waste Land |
8 |
5 |
Study the table given below and the given diagrams/maps.
Area and Production of Rice in major States
|
States |
Area in 000 ha |
% to Total Area |
Production in 000 tones |
% to Total Production |
|
West Bengal |
5,435 |
12.3 |
12,428 |
14.6 |
|
Uttar Pradesh |
5,839 |
13.2 |
11540 |
13.6 |
|
Andhra Pradesh |
4,028 |
9.1 |
12428 |
13.5 |
|
Punjab |
2,611 |
5.9 |
9154 |
10.8 |
|
Tamil Nadu |
2,113 |
4.8 |
7218 |
8.5 |
|
Bihar |
3,671 |
8.3 |
5417 |
6.4 |
(i) Construct a multiple bar diagram to show area under rice in each state.
(ii) Construct a pie diagram to show the percentange of area under rice in each state.
(iii) Construct a dot map to show the production of rice in each state.
(iv) Construct a choropleth map to show the percentage of production of rice in states.
Represent the following data by suitable. The rural and urban population of India diagram:
|
Year |
Rural |
Urban |
|
Polpulation (%) |
Population (%) |
|
|
1901 |
29.2 |
10.8 |
|
1911 |
89.7 |
10.3 |
|
1921 |
88.8 |
11.2 |
|
1931 |
88.0 |
12.0 |
|
1941 |
86.1 |
13.9 |
|
1951 |
82.7 |
17.3 |
|
1961 |
82 |
18.0 |
|
1971 |
80.1 |
19.9 |
|
1981 |
76.7 |
23.3 |
|
1991 |
74.3 |
25.7 |
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