Areas in the downtown, Oak Park, South Natomas, and the Arden Arcade indicate density. Per capita income patterns are indicated by Green dots, the larger the dot the greater income. Generally, income is greatest along the American River, through East Sacramento, Land Park and Greenhaven. Income contours have been drawn showing areas of equal income, much like those patterns seen on weather maps. Where the contours lines are dense the difference in income is great.
Topological maps are similar in their interpretation.
The map show the concentration of demand for regional retail space. Areas in darker green indicate greater demand. Demand is calculated using household income figures. There are more areas since community level shopping includes goods and services more frequently purchased by consumers.