SKILL.md
Map Visualization
Types
| Type | Data | Example |
|---|---|---|
| Choropleth | Values per region | Election results by state |
| Point/Dot | Locations | Store locations |
| Heat map | Density | Crime hotspots |
| Flow | Movement | Migration patterns |
| Bubble | Location + magnitude | City population |
Rules
- Use sequential color scales for quantitative data (light to dark)
- Use diverging scales for data with a meaningful midpoint
- Provide a legend with clear labels
- Zoom and pan for interactive maps
- Tooltips on hover showing exact values
- Don't use rainbow color scales (perceptually misleading)
Accessibility
- Don't rely on color alone (add patterns or labels)
- Provide data table alternative
- Keyboard navigable map markers
- Screen reader announcements for key data points