Practical Work in Geography Class 12 Solutions Chapter 3 Graphical Representation of Data

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So students, after reading this article, you will get very high marks in the exam from this chapter because all the exam-related questions are described in it, so read it completely.

I have been a 12th topper myself and I know what kind of questions are asked in the 12th exam. Presently, I am also playing the role of a teacher, and also make my students practice important information and topics of class 12th. I have written this article with my experience of more than 5 years. With the help of this post, you will be able to score very good marks in Geography from this chapter in the exam.

Practical Work in Geography Class 12 Solutions Chapter 3 Graphical Representation of Data

Chapter No03
ProvidingVvi questions & answers
Chapter NameGraphical Representation of Data
Medium English / Political Science
Study MaterialsFree VVI Study Materials are Available
Pdf downloadClick Here


The importance of using data in geographical studies is well known. This makes the study more effective, authentic and objective, but one of their drawbacks is that the general reader gets confused after seeing the long tabular data presented in the study. From this point of view, graphs and maps are more beneficial. In fact, tangible representations of these data are created so that geographical studies become more simple, accessible and effective. 

Just by looking at them, if you understand and display what is written in the description, then these complex figures become simple and heart-acceptable.

The brain easily accepts the data just by looking at it from one point of view. In displaying the data, the most ordinary person understands the objectives of the data. By displaying the data belong to different items. On the basis of data, comparative study of many diagrams and maps can be done.

Through them, there is convenience in making plans for the future. Data visualization utility

Due to the large number of facts in the form of numbers, it is very difficult to understand them. Due to complex numbers, no conclusion can be reached easily. Ordinary people get nervous because of large numbers. When we analyze these data through various methods


The following points should be kept in mind while preparing the diagrams.

Should pay attention to- 

(1) It is essential to know the type of data through which type of diagram, because the value and usefulness of the diagrams increases on the basis of displaying them.

(2) Scale diagrams are made on one scale or the other. Data selection

Nature, their size and accordingly the size of your paper should be kept in mind. The diagram should not be so small that the facts cannot be known in it, nor should it be so large that the paper becomes small.

(3) Writing- Many information on diagrams are displayed only by writing one diagram name to display their data, so special attention should be paid to this. Diagrams become attractive only through writing.

(4) Symbolization- Various symbols and signs are used in the diagrams. Various signs, aura and stripes are used to display them. Apart from these, they can also be displayed by nomination method.

(5) Decoration- Decoration of diagrams is also necessary. All the diagrams should have beautiful lettering and a scale should be made and a line should be drawn around it. This makes the diagrams look attractive. General Rules for Construction of Diagrams – It is important to keep the following things in mind while making a diagram – No. length, width or

(1) It is essential to choose the appropriate method for drawing the diagram because all the data can be represented by different methods only. Therefore, it is necessary to decide that such and such data should be displayed by such and such diagram. becomes important. The scale is always decided on the basis of the size of the paper and the nature of the data.

Needed The diagram should always be shown in the center of the paper and not at one of its corners. 

(4) Each aura should be explained by a symbol on its clear and concise title above the diagram. 

(6) Diagrams should always be made pure so that accurate and good results can be obtained.

(7) Diagrams (pictures) should be as simple as possible, so that they can be understood easily.

(8) Diagrams should always be attractive, so that there is a desire to see them.


The diagrams are of different types as the statistical thickness or area is calculated. Therefore, the diagrams are of the following types- (a) One Dimensional Diagram

(b) Two Dimensional Dia-grams (c) Three Dimensional Diagrams

(d) Other Diagrams.

(a) One Dimensional Diagrams – The diagrams in which calculations are done on the basis of only one detail are called one dimensional diagrams. In these mainly more attention is given to the height. These diagrams are as follows-

(i) Simple Line Graph, (ii) Polygraph, (iii) Combined Line Graph or Band Graph, (iv) Climograph, (v) Hythergraph, (vi) Climatograph, (vii) Wind Rose Diagram, (viii) Star Diagram, (ix) (2) Use suitable scale before drawing the diagram. Selection is also Simple Bar Diagram, (x) Multiple Bar Diagram, (xi) Compound Bar Diagram, (xii) (3) Always keep the diagram in proportion to the paper Deviation bar Deviation Bar Diagram and (xiii) Pyramid Diagram!

(B) Two Dimensional Diagrams – When length as well as width or thickness is also adopted in a diagram, then it is called a diagram to display more than one aura in a two dimensional (5) diagram. They are also sometimes called area diagrams and lethal diagrams. Two-dimensional diagrams are of the following types – should be.

(i) Rectangular Diagrams, (ii) Circle Diagrams,

(iii) Square Diagrams and (iv) Wheel Diagrams or Pie Diagrams.

(c) Three Dimensional Diagrams – Three Dimensional Diagrams are those in which length, width and height (thickness, depth) all three are shown. Such diagrams are usually drawn when there is a large variation in the data. The following are the types of stereo diagrams- (i) Cubic or Volume Dia-grams,

(ii) Sphere Diagrams and (iii) Block Pile Diagrams.

(D) Other Diagrams – In addition to the above mentioned diagrams, the following other diagrams are also used-

(i) Pictorial Diagrams, (ii) Ergograph,

(Erthograph of Geddes and Ogilive), (iv) Rectangular bleaching pictures (Ascending or Descending)

Cartogram) and (v) Traffic Flow Cartogram.

According to the syllabus, details of the following diagrams can be made here. Given- (i) bar diagram, (ii) mixed bar diagram, (iii) pie diagram

(iv) circular, (v) counterproductive

bar diagram

(BAR DIAGRAM Generally, the simplest method of comparing numbers with identical units and representing different types of values ​​is the bar diagram. Any type of variable quantity can be shown in it. The width of each bar of the bars made in such a diagram is the same. In these, the scale is towards the same direction. Therefore, the height or length of the bar is determined according to the value of the numbers. Generally, the difference between the smallest and the largest number is very large (more than a hundred times). Generally, the scale is marked on the vertical side of the bar diagram.

Bar diagrams are those diagrams in which objects are represented by bars. this diagram

Both horizontal and vertical can be made. Poles or pillars are made in these. Hence, they are also called Columnar Diagrams. According to Mockhouse, “A column diagram, sometimes called a bar diagram, is a series of columns or bars of proportional lengths to represent fixed values. ,

Columnar diagrams, sometimes known as bar-graphs, consist of a series of columns of bars proportional length to the quantities they represent.

Should pay attention-

(1) The length and width of all the bars should be kept same according to the measurement- 

(2) To make a bar diagram, it is necessary to keep the given statistical (iii) Orthograph of Geddis and Ogilvy data in a sequence.

(3) To order the statistical data, they should be arranged in order.

(4) The bars should be made at equal distance. 

(5) These diagrams both horizontally and vertically

(6) If more than one values ​​are displayed in the same diagram, it is appropriate to use different auras in them. 

(7) The lower and upper limits of the data must be kept in mind.

Simple Bar Diagram – This is the initial method of bar diagram. There is no sub-division of any sentence in this. In this method, all such statistical data, the difference between which usually does not exceed 20-30 times, can be shown easily. When the bars are made vertical or vertical, they are called vertical or vertical bars and when they are made in the horizontal or horizontal direction, they are called horizontal bars. There is no difference in the method and characteristics of making both. At the time of making such bars, the scale is fixed with the help of left and vertical lines and bars of different heights will be made at equal distances on the horizontal arm with equal width and on the basis of the scale.


A map showing the distribution of any geographical element of the physical and cultural environment, having a good knowledge of the area of ​​the area, is called a thematic map. Under this, distribution map of any one geographical element like temperature, rainfall, soil, climate, population, agriculture etc. is prepared according to its purpose. In the present times, the trend of such maps has increased. Because of the display of only one geographical element in it, they are more clear and effective. According to the syllabus, the details of the following three subject maps are being given here-

(1) All dots should be of same size. Needed 

(2) Some important things should be kept in mind before measuring points, total points and distribution. These important things or information are as follows- 

(3) The points should be marked in the areas of least quantity and maximum quantity in such a way that the information about the quantity of delivery item is clear from a distance.

(4) Points should be marked in such a way that they can be counted easily.

(5) While marking points, keep in mind internal water bodies, marshes, forests, settlements etc. For example, lest the point over the internal lakes

(6) Dot Method – Dot method is the most simple and useful method in distribution maps. It should be marked as quantitative. To show the distribution in the maps, this method is demonstrated by making points according to the quantity considering the point as the basis. In this, the density of an object is represented by dots of equal size. In this, population distribution, crop and animal production can be displayed easily. Acknowledging the importance of the point method, Winter Botham wrote, “The simplest form of symbol (sign) is the point and it is a very useful form of distribution map in which quantities or values ​​are represented by points of equal size and each point represents has a definite value.

(7) The points should not be marked parallel to the boundary line (administrative unit) or straight line.

(8) At the time of point display, the scale per point should be such that the number of points appears to be the same. Too many points or too few points spoil the appearance of the distribution map.

Generally distribution of economic goods or distribution of population is shown by point method. Thus, the point method is an attractive method in volume-oriented distribution maps. In this, the map maker has to be very careful in displaying the points. In this, special attention should be paid to the area and scale of the map in showing points in different sizes. In small scale maps, the point value is high and the size of the point

(The simplest form of symbol is the point, and a very useful form of a distribution map is one in which quantities of values ​​are represented by points of equal size, each point representing a specific value.)

This method is most popular. Construct a point map on the basis of determining the number of points by point method and marking the points-


Question 1. Presentation of Data Transformation of Data by answering the following questions in 30 words each


i) What is thematic map?

(ii) When different components are grouped into one set of elements/variables (iii) What do you mean by presentation of data? 

(iv) Differences between multiple bar diagram and compound bar diagram are kept side by side, they are demonstrated through a compound bar diagram. State the various variables in this method. 

(v) What are the requirements for constructing a dotted map? It is represented by different rectangles in a single bar. 

(vi) To construct a pipette map 

(vii) What is an isoplane map? An interpolator has the following requirements- How is it implemented? 

(viii) Discuss the important steps to be followed in preparing a chromatic map.

Viva Voce

1. What is a bar diagram? 

Answer- The diagrams by which the statistical data is displayed in the form of a bar are called bar diagrams. These bars can be made in both horizontal and vertical forms with equal width.

2. What is a simple bar diagram? 

Answer- When the distribution of a single object is shown by a bar diagram, then it is called a simple bar diagram.

3. What is meant by mixed bar diagram? 

Answer- When a bar diagram shows the distribution of more than one commodity or different uses of the same commodity, then it is called a mixed bar diagram. A mixed bar diagram is also called a split bar diagram.

4. What is circle diagram?

Answer- When the statistical data is represented by a circle, it is called a circle Arikh. In this, considering the data equal to 360° for display, angles are determined according to the data of each component.

5. What is circle diagram?

Answer- The diagram in which the statistical data is represented by a circle is called a circle diagram. In this, the proportional size of the circle has to be cast, which is determined by the following formula-

6 What is a traffic flow diagram?

Answer- Traffic flow charts are these by which the amount of flow of vehicles running on the route at any time is shown.

7. What is distribution map?

Answer- Distribution maps are those maps in which the order of distribution of any object is displayed, that is, the maps showing data related to quantity, quality or density of various objects are called distribution maps.

8. How many types of distribution maps are there? 

Answer- There are two types of distribution maps – (1) Qualitative Distribution Maps and (2) Quantitative Distribution Maps.

9. What is character symbol or symbol method? 

Answer- In this method, various symbols or letters were used to show the distribution of goods. goes.

10. What is a volume-oriented distribution map? 

Answer- Quantity-oriented distribution maps are those in which the price, quantity or density of a commodity is displayed.

11. What is Varnamatri or Chhayavidhi (Choropleth)? 

Answer- When the density etc. is shown in the distribution maps by shadow or aura of colours, it is called shadow method. 

12. What is the isoline method? 

Answer- In this method, the distribution of any object or unit is displayed by isoline lines. 

What is meant by 13 point method? 

Answer- When the distribution of an object is represented by points of equal size, then it is called point method.

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What is the Chinese proverb in context of diagrams, graphs and maps?

The disciplines that deal with the principles and methods of data processing and mapping using a combination of computer hardware and application software are termed Database Management System (DBMS) and Computer-Assisted Cartography respectively.

What are data? How are these important?

There is a Chinese proverb that ‘a picture is equivalent to thousands of words’. Hence, the graphic method of the representation of data enhances our understanding, and makes the comparisons easy.

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