Question

differentiate between chlorophyll and isopleth method

Answer 1

Choropleth Maps

These are maps, where areas are shaded according to a prearranged key, each shading or colour type representing a range of values. Population density information, expressed as 'per km²,' is appropriately represented using a choropleth map. Choropleth maps are also appropriate for indicating differences in land use, like the amount of recreational land or type of forest cover.

Isopleth maps differ from choropleth maps in that the data is not grouped to a pre-defined unit like a city district. These maps can take two forms:

Lines of equal value are drawn such that all values on one side are higher than the "isoline" value and all values on the other side are lower, or

Ranges of similar value are filled with similar colours or patterns.