Question

difference between choropleth and isopleths method

Answer 1

in choropleth method tint of same colour are used to value according to distribution and they have one value assigned to the sub- administrative region.
in isopleth method lines of different shapes are used to show values according to distribution and here , value of the  sub-administrative does not matter here.

Answer 2

Choropleth method of mapping uses prearranged keys, colours and shades to describe a range of values for areas.

For example: Population Density Information in ‘per km^2’  is correctly depicted using choropleth map. Other examples where choropleth map can be used are – to understand the differences in land use, to illustrate the type of forest cover.

Isopleths method uses simple data with a sustained distribution. There are two types of isopleths mapping. They are

Lines of equal value are used where higher values are on one side of the ‘isoline’ and lower values are on the other side.

Range of similar values are grouped under similar colours or patterns.