Lesson - 2 - Narajole Raj College

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Lesson - 2

Q. Prepare a Pie diagrams with proportional circles to show castes community of different CD block of the Jhargram Dist. (2011) according to the given data:

Name of C.D.

Block

Total

population General S.C S.T Jhargram 170,097 106243 25225 38629 Binpur I 156,153 73127 39069 43957 Binpur II 164,522 72850 25945 65727 Jamboni 113,197 60334 20489 32374 Nayagram 142,199 56410 28895 56894 Sankrail 115,418 65592 21006 28820 Gopiballavpur I 108,254 42014 29423 36817 Gopiballavpur II 104,996 47888 32549 24559

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Jhargram

Jhargram Binpur – I

Gopiballavpur - I Gopiballavpur - II

Sankrail

Nayagram Binpur - II

Jamboni

0 20

10

Km.

20

Sl. No Name of C.D. Block Total Population

(𝑷_𝑻)

Radius of a Circle ( 𝐫 = ^𝑷𝑻

𝝅 ) Units

Scale Selection

Radius of a circle according to scale ( 1 cm.

to 350 units) Cm.

1. Jhargram 170,097 232.688

1cm. to 350 units

0.665

2. Binpur I 156,153 222.946 0.637

3. Binpur II 164,522 228.843 0.654

4. Jamboni 113,197 189.820 0.542

5. Nayagram 142,199 212.752 0.608

6. Sankrail 115,418 191.643 0.548

7. Gopiballavpur I 108,254 185.630 0.530

8. Gopiballavpur II 104,996 182.815 0.522

For proportional or Graphical Scale

1 (Largest) 180,000 239.365 0.684

2 (Median) 140,000 211.100 0.603

3 (Smallest) 100,000 178.412 0.510

Step – 1: Calculation table for Pie diagrams with proportional circles of the castes community of different CD block of the Jhargram district:

SOLUATION

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Castes Community Structure Angular Value (𝜽^𝒐) Total Angle

General SC ST General SC ST

106243 25225 38629 224^O 51^/ 24^// 53^O 23^/ 14^// 81^O 45^/ 22^// 360^O 73127 39069 43957 168^O 35^/ 22^// 90^O 4^/ 15^// 101^O20^/ 23^// 360^O 72850 25945 65727 159^O 24^/ 26^// 56^O 46^/ 19^// 143^O49^/ 15^// 360^O 60334 20489 32374 191^O 52^/ 48^/ 65^O 9^/40^/ 102^O 57^/ 32^/ 360^O 56410 28895 56894 142^O 48^/ 40^/ 73^O 9^/ 9^/ 144^O 2^/ 11^/ 360^O 65592 21006 28820 204^O 35^/ 16^/ 65^O 31^/ 11^/ 89^O 53^/ 33^/ 360^O 42014 29423 36817 139^O 43^/ 5^/ 97^O 50^/ 48^/ 122^O 26^/ 7^/ 360^O 47888 32549 24559 164^O 11^/ 37^/ 111^O 36^/ 3^/ 84^O 12^/ 20^/ 360^O

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Worksheet Of Angular Segments For Proportional Pie Diagrams

Step 2: Calculate the radius of a circle Formula:

Radius of a circle (r) = ^𝑄

𝜋

For example of Jhargram CD Block

Radius of a circle of (r) = ^𝑃𝑇

𝜋

Or, r = 170097

𝜋 = 232.688 Units

So, radius of a circle of Jhargram CD block is 232.688 units

Step 3: Calculate the radius of a circle according to selected scale

Radius of a circle according to scale = Actual radius of a circle ( 𝑟)

Selected Scale (1 𝐶𝑚.𝑡𝑜 350 𝑈𝑛𝑖𝑡)

For example of Jhargram CD Block

Radius of a circle according to scale r = 232.688

350 Cm = 0.665 Cm.

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Step 4: Calculated the angular value of different castes community group of each C.D block of Jhargram District, 2011

Angular value of different community group (𝜃^𝑂)

= 𝑇𝑜𝑡𝑎𝑙 𝑎𝑛𝑔𝑢𝑙𝑎𝑟 𝑣𝑎𝑙𝑢𝑒 𝑜𝑓 𝑕𝑜𝑙𝑒 𝑐𝑖𝑟𝑐𝑙𝑒

𝑇𝑜𝑡𝑎𝑙 𝑝𝑜𝑝𝑖𝑙𝑎𝑡𝑖𝑜𝑛 (𝑃_𝑇) × 𝐼𝑛𝑑𝑖𝑣𝑢𝑑𝑎𝑙 𝑐𝑜𝑚𝑚𝑢𝑛𝑖𝑡𝑦 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛

Or, 𝜃^𝑂 = ³⁶⁰

𝑂

𝑃_𝑇 × 𝐼𝑛𝑑𝑖𝑣𝑢𝑑𝑎𝑙 𝑐𝑎𝑠𝑡𝑒𝑠 𝑐𝑜𝑚𝑚𝑢𝑛𝑖𝑡𝑦 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛

For example of Jhargram CD Block of General population Angular value of General population (𝜃^𝑂) = ³⁶⁰

𝑂

𝑃_𝑇 × 𝐺𝑒𝑛𝑒𝑟𝑎𝑙 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛 Or, 𝜃^𝑂 = 170097 ^360𝑂 × 106243

Or, 𝜃^𝑂 = 224^O 51^/ 24^//

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

For example of Jhargram CD Block of SC population Angular value of SC population (𝜃

^𝑂

) =

³⁶⁰

𝑂

𝑃_𝑇

× 𝑆𝐶 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛 Or,

𝜃^𝑂 = 170097 ^360𝑂 × 25225

Or, 𝜃

^𝑂

= 53

^O

23

^/

14

^//

For example of Jhargram CD Block of ST population Angular value of ST population (𝜃

^𝑂

) =

³⁶⁰

𝑂

𝑃_𝑇

× 𝑆𝑇 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛

Or, 𝜃^𝑂 = 170097 ^360𝑂 × 38629

Or, 𝜃

^𝑂

= 81

^O

45

^/

22

^//

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Jhargram CD Block 225^O

225^O 53^O

0^O

81^O

Step - 1 Step - 2

Step - 3 Step - 4

Step - 5

Fixed line

Fixed line

PROPORTIONAL SCALE Population (Persons)

250 175 100

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Step- 1: Diameter (2r) of the largest proportional circle

Step – 2: Radius of the median proportional circle

Step – 3: Draw the median Circle

Step – 4: Radius of the smallest circle Step - A

Step - B Step - C

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Showing The Castes Communication Of Different C.D. Blocks Of Jhargram District (2011)

LEGEND

PROPORTIONAL SCALE

10 20

Km.

20

Jhargram Binpur – I

Gopiballavpur - I

Gopiballavpur - II Sankrail

Nayagram Binpur - II

Jamboni

Population (000, Persons)

0

General Category Scheduled Caste (SCs) Scheduled Tribes (STs)

100 180 140

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Drawing Procedure On Worksheet With Out Respective Map

Jhargram Binpur – I

Gopiballavpur - I Gopiballavpur - II

Sankrail Nayagram

Binpur - II Jamboni

LEGEND

PROPORTIONAL SCALE

Population (000, Persons)

General Category Scheduled Caste (SCs) Scheduled Tribes (STs)

100 140 180

Interpretation

The proportional pie on the map of the Jhargram district clearly and intriguingly depicts the nature and characteristics of the caste community in different CD blocks. From the map, it can be interpreted that the distribution of cast community in each CD block of Jhargram District is quite uneven. Although the general community is predominant in all the blocks, the presence of the Scheduled Tribes (ST) is no less. However, the number of Scheduled Caste (SC) in all the remaining blocks except Gopibolovpur - II CD block is negligible then the scheduled tribes. The Binpur-I and Binpur-II CD blocks in the northern plateau region of respective district have the highest concentered number of STs (65727) and SCs (39069) respectively. Probably because the plateau area is preferred for these two races, their predominance can be noticed in this part of Jhargram district.

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

1 .Chandrakona I 2. Chandrakona II 3. Dantan I 4. Dantan II 5. Daspur I 6. Daspur II 7. Debra 8. Garbeta I 9. Garbeta II 10. Garbeta III 11. Ghatal 12. Keshiary 13. Keshpur 14. Kharagpur I 15. Kharagpur II 16. Midnapore 17. Mohanpur 18. Narayangarh 19. Pingla 20. Sabang 21. Salbani

2 1

3 4

6 5 7 8

9

10

11

12

13

14 15 16

17 18

19 20 21

Paschim Medinipur

Km.

Geography (U.G), SEM- II, Paper – C4P : Cartograms (Pie)

Q. Prepare a proportional pie diagram to show – castes community of different C.D. blocks of the Paschim Medinipur Dist. (2011) according to the given data are below:

Sl No.

Tehsil (CD Block)

Population (2011)

SC ST General

3 Chandrakona I 1,36,006 46759 7516 81731 4 Chandrakona II 1,23,269 37330 6841 79098

5 Dantan I 1,72,107 29235 28183 114689

6 Dantan II 1,55,017 13828 10861 130328

7 Daspur I 2,03,987 49651 5695 148641

8 Daspur II 2,38,529 29922 585 208022

9 Debra 2,88,619 37503 59122 191994

10 Garbeta I 2,28,513 55133 18134 155246

11 Garbeta II 1,48,410 39301 29669 79440

12 Garbeta III 1,69,528 26004 23955 119569

13 Ghatal 2,19,555 72243 3861 143451

18 Keshiary 1,49,260 34260 51128 63872

19 Keshpur 3,39,248 89726 19616 229906

20 Kharagpur I 2,58,040 46431 42453 169156 21 Kharagpur II 1,83,440 34138 46899 102403

22 Midnapore 1,91,705 37445 33869 120391

23 Mohanpur 1,11,901 11525 6026 94350

24 Narayangarh 3,02,620 56333 68080 178207

26 Pingla 1,94,809 16428 19332 159049

27 Sabang 2,70,492 36064 16818 217610

28 Salbani 1,88,653 35095 32771 120787

Data Source link: https://censusindia.gov.in/2011census/dchb/DCHB_A/19/1918_PART_A_DCHB_PASCHIM%20MEDINIPUR.pdf

Key

Geography (U.G), SEM- II, Paper – C4P : Cartogram (Pie)

Reference:

1. Misra, R.P., Ramesh,A., 2002, Fundamentals of Cartography, Revised and Enlarged, pp. 542-458

2. Monkhouse, F.J., Wilkinson, H.R.,1976, Maps and Diagrams, Methuen & Co LTD, London, pp. 288-305 3. Sarkar, A., 2009, Practical Geography, revised edition, orient black swan, Kolkata, pp.163-169.

4. Sing, R.L., Sing, R.P.B., 2014, Elements of Practical Geography, Kalyani Publishers, New Delhi, pp. 162-190.