Solution
Question 1.
Give reasons why following sentences are right or wrong:
(1) The main aim of distributional maps is to show location.
Wrong- The main aim of distributional maps is to show geographical distribution of variables like temperature, rainfall, population, etc.
(2) In choropleth maps, only one value is assigned to the sub-administrative unit.
Right
(3) In choropleth maps, colours/tints do not change according to the values of the variables.
Wrong - In choropleth method, the data regarding various geographical variables is shown by shades or tints of various colours. Colour tints are dependent on values. Regions with lesser values of a geographical variable are shown by lighter tints and regions with higher values of geographical variables are shown by darker tints.
(4) Choropleth maps are used to show altitudes.
Wrong - Choropleth maps are used to show the data regarding various geographical variables by shades or tints of various colours.
(5) Isopleth maps are used to show population distribution.
Wrong- The method which is best suited to show the distribution of population in a region is dot method or choropleth method.
(6) In dot method, every dot should have an appropriate scale.
Right
(7) Isopleth maps are not made using isolines.
Wrong - In Isopleth maps, the highest and the lowest values of the given variable are taken into consideration and accordingly the class intervals are decided and then isolines are drawn for the decided intervals.
(8) Distribution of various geographical elements can be shown using dot method.
Right
Question 2.
Answer in brief.
(1) Explain the use and types of distributional maps.
Use of distributional maps : The distributional maps are useful for explaining the patterns of distribution of a particular geographical variable. The types of distributional maps : The following are the types of distributional maps : (1) Dot maps : (2) Choropleth method : (3) Isopleth method :
(2) Differentiate between choropleth and isopleths methods.
Choropleth methods
Isopleths methods
(1) When the distribution of a variable is not continuous (i.e discontinuous), the choropleth method is then used to show its distribution.
When the distribution of a variable is continuous, the isopleth method is then used to show its distribution.
(2) The tint of the same colour or black and white patterns are used to show the distribution of a particular variable.
Isolines are used to show the distribution of a particular variable.
The sub- administrative units are taken into consideration.
The sub-administrative units are not taken into consideration.
(3) Explain with reasons the method which is best suited to show the distribution of population in a region.
(1) The method which is best suited to show the distribution of population in a region is dot method or choropleth method. (2) The distribution of population is not continuous. (i.e. discontinuous) and it is freely scattered across the region. (3) Dot method : In dot method, the way the population is distributed throughout the region, the dots are used to show its distribution in a map. In this method, rural population is shown by dots and urban population is shown by circles. (4) Choropleth method : In choropleth method, the sub-administrative units are taken into consideration to show the distribution of population. In this method, the smallest and the largest values of population in a region are taken into consideration. After that, 5-7 classes are made. Each class interval has different value and accordingly it is assigned a unique tint of same colour or black and white patterns to show the distribution of population in sub-administrative units.
Question 3.
Which method will you use for the following information ?
(1) Talukawise wheat production in the district
Choropleth method
(2) Distribution of the altitude of the land in the district.
isopleth method
(3) Distribution of domestic animals in the State
Dot method
(4) The distribution of population density in India
Choropleth method
(5) Temperature distribution in Maharashtra State.
isopleth method
Question 4.
Study the population distribution map of Kolhapur district and answer the following questions:
(1) Which method has been used to show the distribution of population in the district?
The dot method has been used to show the distribution of population in the district.
(2) Explain the directionwise distribution of population from dense to sparse.
The population is dense in the eastern part of the district and thin in the western part of the district.
(3) What is the population shown by the largest circle ? Which place is that?
The population shown by the largest circle is nearly twenty lakhs. That place is Kolhapur city
(4) Which Taluka has the least population?
Gagan Bavada taluka.