Choropleth Map
Definition
A Choropleth Map is a thematic map in which geographic areas are shaded or patterned in proportion to the value of a statistical variable, such as population density or median income. It is a common tool for visualizing quantitative data linked to spatial units.
Application
Used in public health, economics, urban planning, and political analysis to display trends, disparities, and distributions across regions using color intensity or gradients.
FAQ
1. What makes a choropleth map effective in GIS?
It clearly communicates relative values across geographic units, revealing spatial trends through intuitive color gradients.
2. What makes a choropleth map effective in GIS?
Use normalized data (e.g. percentage, per capita), appropriate color ramps, and legends to avoid misinterpretation.
3. What makes a choropleth map effective in GIS?
Quantitative data aggregated by geographic units, such as income, age, or voting results.
4. What makes a choropleth map effective in GIS?
They can be misleading if data is not normalized or if area size influences perception more than actual values.
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