Exe
01. Give reasons why following sentences
are right or wrong:
✓ (1) The main aim of distributional
maps is to show location. .
(2) In choropleth maps, only one
value is assigned to the
sub-administrative unit.
(3) In choropleth maps, colours/tints
do not change according to the
values of the variables.
(4) Choropleth maps are used to show
altitudes.
(5) Isopleth maps are used to show
population distribution.
(6) In dot method, every dot should
have an appropriate scale.
(7) Isopleth maps are not made using
isolines.
Answers
Answer:
ooooooooookkkkkkkkkkkkkkkkk
Answer:
1: Distributional Maps are called thematic maps. Through these maps, distribution of various variables in a region is shown, distribution of temperature, rainfall, population, etc. is shown on the map according to the data of these variables.
The uses and types of distributional maps are:
Dot Maps – A dot map is prepared using statistical data. While preparing dot maps, only data gathered through counting is used. The way a variable is distributed throughout the region, the dots are used to show its distribution on the map. For example, the population of a region, the distribution of cattle, etc.
To show distribution through the dot method, the value of a dot has to be determined. To do that, the lowest and the highest values of a given variable in a region are taken into consideration. Accordingly, the number of dots is determined. Also, we need to consider the size of the dot, the density of the variable and the scale of the map. The dot method is most suitable for that variable which is freely scattered across the region.
Choropleth Maps – In these maps, the data regarding various geographical variables are shown by shades or tints of various colours. While making such maps, the data used for different variables are obtained, through various processes such as measurement, surveying, etc. In this method, only one value is given to one sub administrative unit in a region. The smallest and the largest values of the given data of the variables are taken into consideration.
Isopleth Maps – In these maps, the distribution was shown with the help of lines showing equal values. When the distribution of a variable is continuous, the isopleth method is then used to show its distribution. For example, altitude, temperature, rainfall, etc. For these maps, we need to obtain the accurate data regarding the altitude, temperature, rainfall, etc. of some places in a region.
Answer 2: The difference between choropleth and isopleths methods are as follows:
Choropleth Method Isopleths Method
In these maps, the data regarding various geographical variables is shown by shading/ tints of various colours. In these maps, distribution is shown with the help of lines showing equal values.
In this method only one variable is given to one sub administrative unit in a region. A variable is continuous, the isopleths method is then used to show its distribution.
Choropleth method is used to show the distribution of population, density and distribution of cattle. Isopleth method is used to show the distribution of temperature, altitude and rainfall of a region.
Answer 3: Dot method or dot map is the best way to show the distribution of the population in the region. Using the dot method, you can easily find the exact population number in a particular region. In the dot map, the distribution is shown with the help of dots whose value is pre-determined by choosing the appropriate scale. This representation of data is highly possible for several variables, such as populations that are freely scattered across the region.