Which of the following steps are used to prepare Isopleth maps?
(A) By considering the highest and lowest values of the variable
(B) Class interval should be decided
(C) Lines are drawn for the decided intervals, location with the same value are joined by a line
(D) All of the above

Hint:These are maps, where zones are concealed by a prearranged key, each concealing or shading type speaking to a scope of qualities. Populace thickness data, communicated as &39; per km², &39; is suitably spoken to utilizing a choropleth map

Complete answer:
Isopleth maps contrast from choropleth maps in that the information isn't gathered to a predefined unit like a city area. These guides can take two structures:- Lines of equivalent worth are drawn with the end goal that all qualities on one side are higher than the "isoline " worth and all qualities on the opposite side are lower, or Scopes of comparative worth are loaded up with comparable tones or examples. This kind of guide is ideal for indicating slow change over space and evades the sudden changes which limit lines produce on choropleth maps. Temperature, for instance, is a marvel that should be planned utilizing isopleths, since temperature exists at each point (is nonstop), yet doesn't change unexpectedly anytime (like populace thickness may do as you cross into another statistics zone). Help guides should constantly be in isopleth structure therefore, the disservice of isopleths is that they are unsatisfactory for demonstrating intermittent or &39; patchy&39; appropriations and a lot of information is needed for precise drawing.

Hence option D is the correct answer.

Note: By thinking about the most elevated and least estimations of the variable. The class stretch is chosen to draw the isopleths maps which thus chooses the contrast between the lines. Lines are drawn for the chosen stretches, areas with a similar worth are joined by a line.