choropleth: meaning, definition, pronunciation and examples
C2Academic, Technical, Specialised
Quick answer
What does “choropleth” mean?
A thematic map where geographic areas are shaded or patterned in proportion to the measurement of a statistical variable.
Audio
Pronunciation
Definition
Meaning and Definition
A thematic map where geographic areas are shaded or patterned in proportion to the measurement of a statistical variable.
A widely-used method in cartography, statistics, and data visualization to represent aggregated data by region, such as population density or election results.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage; both use the term identically. Spelling remains the same.
Connotations
Purely technical term in both varieties; no connotative differences.
Frequency
Equally low-frequency and specialised in both BrE and AmE, limited to fields of geography, statistics, and data science.
Grammar
How to Use “choropleth” in a Sentence
The mapmaker presented the data IN a choropleth.They CHOSE a choropleth FOR the unemployment figures.The report WAS ILLUSTRATED WITH a choropleth.Vocabulary
Collocations
Examples
Examples of “choropleth” in a Sentence
verb
British English
- The team decided to choropleth the census data for the regional report.
American English
- We'll need to choropleth these figures by county for the presentation.
adjective
British English
- The choropleth display was more effective than the bar chart.
American English
- She preferred the choropleth visualization for the demographic study.
Usage
Meaning in Context
Business
Used in reports to visualize regional sales performance or market penetration.
Academic
Common in geography, economics, sociology, and public health research papers.
Everyday
Virtually never used in casual conversation; encountered when interpreting data on news websites.
Technical
Standard term in GIS (Geographic Information Systems), cartography, and data visualization software.
Vocabulary
Synonyms of “choropleth”
Strong
Neutral
Weak
Vocabulary
Antonyms of “choropleth”
Watch out
Common Mistakes When Using “choropleth”
- Misspelling as 'chropleth' or 'choropleth'.
- Using it to refer to maps showing individual point data rather than aggregated area data.
- Incorrect pronunciation stressing the second syllable.
FAQ
Frequently Asked Questions
Not exactly. While both use colour, a heatmap typically represents the density of points or events in a continuous space, whereas a choropleth shades predefined, distinct geographic areas (like countries or postcodes) based on aggregated data for that area.
The most common mistake is failing to normalize the data (e.g., using total counts instead of rates per capita), which can misrepresent the distribution by making highly populated areas appear more extreme regardless of the actual rate or proportion.
Choropleths can be created in many GIS software packages (like QGIS, ArcGIS), data visualization tools (like Tableau, Power BI), and programming libraries (like matplotlib in Python with geopandas, or ggplot2 in R).
Yes, though it is jargon. In technical circles, one might say "We need to choropleth this dataset," meaning to represent the data in choropleth form. This usage is more common in American English.
A thematic map where geographic areas are shaded or patterned in proportion to the measurement of a statistical variable.
Choropleth is usually academic, technical, specialised in register.
Choropleth: in British English it is pronounced /ˈkɒrəʊpleθ/, and in American English it is pronounced /ˈkɔːrəpleθ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think 'CHORus of PLETHoras' – many different quantities (a plethora) sung by different places (the chorus).
Conceptual Metaphor
DATA IS A PAINTED SURFACE (where colour intensity equals value magnitude).
Practice
Quiz
What is a defining feature of a choropleth map?