Isarithmic maps (a subgroup of thematic maps) depict geographical data across a smooth surface. Isarithmic maps are utilized to display various types of information, which include, but are not limited to, weather and climate, soil types, and population density. My example shows the average annual temperatures in the United States.
Choropleth maps provide a visual image for viewers of how a measurement varies across a geographic area. This variation is shown through the utilization of different shading (the greater density of shading, the greater the actual density), colors or symbols inside specific areas on the map to convey average values. My example of a cloropleth map shows the percent of persons who are either Hispanic or Latino in Floridian counties.
Dot density maps are utilized to convey density (imagine that!). These maps help show values, such as population data, and give a clear distinction to where values are concentrated. My example shows a map of federally owned and Indian land by departmental jurisdiction.
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