1. Thematic Maps
Unlike general purpose maps, thematic maps are intended for one specific purpose: to communicate a particular topic or theme

2. Choropleth Map

3. Choropleth Map

4. Choropleth Map

5. Choropleth Map

6. Choropleth Map
A map based on numerical data on some topic, with data available enumeration districts (usually political units such as counties, states or countries.) The numerical values are used to place each of the districts into a particular category. An area symbol usually a color or a shade of gray) is then used to show which category each of the enumeration districts fall into.

7. Dot Maps

8. Dot Maps
New Jersey Population

9. Dot Maps
World Population

10. Dot Maps

11. Dot Maps
employ dots to convey information about a distribution. A single dot may represent one occurrence of something (an earthquake, perhaps) or more than one (a dot might represent 100,000 people, for example).

12. Graduated Circle Map

13. Graduated Circle Map

14. Graduated Circle Map

15. Graduated Circle Map

16. Graduated Circle Map
also use a point symbol, but the symbols have different sizes in proportion to some quantity that occurs at that point. The populations of different cities are frequently depicted on graduated circle maps.

17. Isoline Map

18. Isoline Map

19. Isoline Map
A langley is a unit of energy distribution over area. It is used to measure solar radiation

20. Isoline Map

21. Isoline Map
use line symbols to portray a continous distribution such as temperature or elevation. Isolines are lines that connect points of equal numeric value. One of the best-known types of isoline map is the contour map, which shows elevation above sea level.

22. Cartogram

23. Cartogram Total population

24. Cartogram Total population year 1

25. Cartogram

26. Cartogram
Strictly speaking, cartograms are not really maps because they are not drawn to scale. Instead, areas on the cartogram are intentionally drawn larger or smaller in proportion to the phenomenon being shown. A cartogram of world population, for example, might show countries as being either larger or smaller in proportion to their populations.