A choropleth map shades geographic regions by data value, making spatial patterns in quantitative data instantly visible. It is one of the most popular thematic map types for comparing statistics across countries or states.
This sample visualizes the year women were first granted suffrage at the national level for every country, sourced from Wikipedia. An ordinal color scale groups years into eight brackets with an interactive color range legend at the bottom, while HTML tooltips display the exact year and contextual notes — including special handling for countries that never granted suffrage. Zoom controls support detailed exploration.
Follow the step-by-step Choropleth Map Tutorial to learn how such maps are built. See the Choropleth Map documentation for all configuration options.