Q 1. Give reasons why following sentences are right or wrong:

(1) The main aim of distributional maps is to show location.

Ans: Wrong

Reason:

The main aim of distributional maps is not just to show location but to represent the distribution of specific variables like temperature, rainfall, or population across a region. These thematic maps use different methods to visually display how such variables are spread in a particular area for better understanding and analysis.

(2) In choropleth maps, only one value is assigned to the sub-administrative unit. 

Ans: Right 

Reason:

In choropleth maps, only one value is assigned to each sub-administrative unit because data is classified into specific ranges and represented using different shades or patterns. Each shade indicates one class of data for a region. This method ensures clarity by visually showing only the dominant or average value for each unit, not multiple values.

(3) In choropleth maps, colours/tints do not change according to the values of the variables. 

Ans: Wrong. 

Reason: In choropleth maps, colours or tints change based on the values of a variable. The data is divided into 5–7 classes, from lowest to highest values. Each class is represented by a different shade of the same colour or pattern to show variation across sub-administrative units like districts or states.

(4) Choropleth maps are used to show altitudes. 

Ans: Wrong.

Reason: Choropleth maps are not used to show altitudes. Isopleth maps are used instead, as they show continuous data like altitude using lines connecting equal values. Choropleth maps represent discontinuous data like population or livestock by using shaded areas. Hence, for altitude, isopleth maps are more appropriate and accurate.

(5) Isopleth maps are used to show population distribution. 

Ans: Wrong.

Reason:

Isopleth maps show continuous data like temperature or altitude. Population distribution is discontinuous, so dot method or choropleth maps are used instead. These methods effectively represent how people are spread across an area, while isopleth maps are unsuitable for showing such non-continuous data.

(6) In dot method, every dot should have an appropriate scale. 

Ans: Right.

Reason: In the dot method, each dot represents a specific value of a variable. To accurately reflect data, an appropriate scale must be chosen. This ensures the number and placement of dots correctly represent the distribution and quantity of the variable across the region, making the map meaningful and easy to interpret.

(7) Isopleth maps are not made using isolines.

Ans: Wrong.

Reason: Isopleth maps are indeed made using isolines. Isolines are lines that connect places with equal values of a particular variable, like temperature or rainfall. Since isopleth maps are drawn by joining such points of equal value, they are essentially based on isolines. Hence, the statement is incorrect.

(8) Distribution of various geographical elements can be shown using the dot method.

Ans: Wrong.

Reason: The dot method is used to show the distribution of scattered geographical elements like population, minerals, or cattle. It is not suitable for continuous elements such as rainfall, temperature, or altitude, which require methods like isopleths or choropleths for accurate representation. Hence, not all geographical elements can be shown using the dot method.