← All chart types
map family
symbol-map
Map with point symbols whose size or colour encodes value.
Dots/bubbles placed at lat-lon, with size or colour encoding magnitude. Avoids the area-bias of choropleths because all symbols start small.
When to use
Cities, events, transactions where lat-lon is precise and area would mislead.
When NOT to use
Whole regions need filling (use choropleth).
Rhetorical roles
- locate
- compare
Variants & related
Required primitives
- has_legend (size or colour scale)
Optional primitives
- has_data_labels
Common anti-patterns
- dimensional-vagueness
Disambiguation rules
- Dots/bubbles overlaid on a map outline.
- If filled regions, it is choropleth.