Maps & Topography

1) Chloropleth map

This kind of map will be used when your data  has a unit(s) like countries or counties, standardized to show rates or ratios, and a continuous statistical surface. 

2) Isarithmic map

This kind of map will be used for continuous data, such as elevation and precipitation.

3) Dot Density map

This kind of map will be used to show density differences across a landscape.

4) Proportional Symbol map

This type of map scales the size of symbols proportionally to the data value found at that location. In short, the larger the symbol, more of whatever is being studied exists at that location.