A thematic map
presents information about a single theme within a geographic area. These maps
can show a population density within a specific geologic area. In addition, the
following can also be shown; cultural groups, economic, sociological and
agricultural data.
This map shows the soil moisture of the United States.
Reference URL:
http://soils.usda.gov/use/thematic/moist_regimes.html
This map shows the soil moisture of the United States.