Cartography - Module 3 - Map Types - Choropleth Maps

Choropleth Map

A type of map where areas are shaded or colored to represent the magnitude of an attribute, such as population density.

Enumeration Area

A geographic area where data is collected and combined, such as states, counties, or regions.

Normalization

The process of adjusting data to eliminate size or area bias, allowing for fair comparisons between different regions.

Continuous Data

Data that is not confined to specific boundaries and can vary smoothly over a range, such as air temperature.

Data Classification

The method of organizing data into categories for display on a map, often using schemes like equal-area, equal frequency, arithmetic, geometric, nested means, or natural breaks.

Equal-Area Projection

A map projection that maintains area proportions, making it suitable for comparing values across different regions.

Symbolization

The use of symbols, colors, or patterns to represent data on a map.

Sequential Color Scheme

A color scheme on a color chloropleth map used for unipolar data, where there is no natural dividing point, with colors varying in intensity to represent different values.

Diverging Color Scheme

A color scheme used for bipolar data, where there is a natural dividing point, such as zero, with colors diverging from a central point.

Qualitative Color Scheme

A color scheme used for balanced data, featuring distinct colors to emphasize differences between categories.

Legend

A key on a map that explains the meaning of the symbols and colors used.

Projection

The method of representing the curved surface of the earth on a flat map.

Homogeneity

The quality of being uniform or similar in nature.

Thematic Map

A map designed to highlight a particular theme or subject area.