Distribution maps are a form of thematic maps that are used to represent the distribution of particular geographic elements within a given region.
Use of distributional maps : The distributional maps are useful for explaining the patterns of distribution of a particular geographical variable.
The following are the types of distributional maps:
(i) Dot Method : The distributional maps based on statistical data, made by this method make use of dots of a pre-decide size to show the distribution of a particular variable. e.g. Dot method map is used to show population of a region, distribution of cattle etc.
(ii) Choropleth Method : The distributional map made by this method makes use of shades or tints of various colours, to show the distribution of particular variable. e.g. Choropleth method map is used to show population density, types of forest cover, uses of land.
(iii) Isopleth Method : The distributional map made by this method makes use of line joining locations or places having same or equal values of a particular variable. e.g. Isopleth method map is used to show altitude, temperature, rainfall.