Question

differences between thematic maps and distributional maps​

Answer 1

Explanation:

WHAT IS A THEMATIC MAP?

There are three classes of maps:

1) general reference maps which show the locations of a variety of features;

2) thematic maps which show the distribution of a single attribute (characteristic) or the relationship between several attributes, and;

3) charts which are used primarily for navigational purposes.

Thematic maps can cover a variety of characteristics from soil types to population density. It is the cartographers responsibility to make sure that the map shows the correct distribution or the relationship between the various attributes.

Distributional Maps

ISOPLETH METHOD - DEFINITION

The method by which the distribution of any attribute is shown with the help of lines of equal values, in a map are called isopleth method. For these maps we need the accurate data of a particular attribute such as altitude, temperature, rainfall, etc of some place of a particular region.

CHOROPLETH METHOD - DEFINITION

In the choropleth method, the data of various geographical variables are shown by shades or tints of various colours. While drawing these maps the data is obtained through measurement, surveying etc. Generally, a darker shade or more closely spaced pattern is used to represent larger quantities of the phenomenon and a lighter shade or more sparsely spaced pattern is used to represent smaller quantities.

DOT METHOD - DEFINITION

A dot map, is a map that uses a dot symbol to show the distribution of a feature or phenomenon. These maps are prepared using statistical data. To show the distribution through dot method, the value of a dot has to be determined. The number of dots and the size of the dots are also considered while drawing these maps.