← Data Visualization learning pathData Visualization · Module 8 of 10
Maps and special charts
Show geographic and complex data.
📖 Key ideas
- Choropleth maps colour regions by value.
- Point maps show locations; bubble maps show size.
- Treemaps show hierarchy and part-to-whole.
- Sankey diagrams show flows.
- Use maps only when geography matters.
💡 Real-life example: A choropleth is colouring a state map by rainfall: darker means more.
ChoroplethMap regions coloured by value
TreemapNested rectangles for hierarchy
Sankey diagramFlow widths between stages
Bubble mapCircles sized by value on a map