Answer in brief.
Differentiate between choropleth and isopleths methods.
Choropleth and Isopleth maps are two different forms of distributional maps that are used tor represent various geographical elements in a region. At first glance, they may look similar but the methodology behind them is completely different and they also utilize different data. The following table differentiates between the two methods.
|Choropleth method||Isopleth method|
|1.||The for different Geographical variables is represented by either shade of the same color or by different colors.||The data for the variable under study is demarcated by isolines which are lines joining the places having the same value.|
|2.||Continuous or varying data can be used for mapping purposes.||Only continuous data is used.|
|3.||Administrative boundaries define data boundary and hence continuous data may be misrepresented.||Administrative boundaries do not define a data boundary. Data boundary is defined by isolines.|
|4.||The smallest and largest values of given data are used to classify the data range into acceptable classes.||Places having the same data value determine the drawing of isolines. The range is determined by the difference in these isolines.|
|5.||Color gradient or patterns allows map interpretation deeper the color higher the value of data under study.||Placement of lines allows map interpretation, the closer the isolines steeper the data distribution.|
|6.||Mainly used for data like population density, distribution, etc.||Mainly used for continuous data live temperature, rainfall, altitude, etc.|