Thematic Maps are made to show a particular theme connected with a specific geographic area. There are multiple types of thematic maps.

Proportional Symbol Map

A proportional symbol map uses symbols such as a circle to show intensity or frequency. The symbol can show with various sizes the frequency of the variable of whats being mapped.  

Source: www.lib.utexas.edu

Isoline Map

This map shows lines that connect points to show of equal value.

Source:www.lib.utexas.edu

Choropleth Map:

A choropleth map shows the level of a variable within predefined regions. The Choropleth map categorizes a variable into a class and also shows each class differently using different colors patterns and shading.  

Source: picc.it