Chart Type for Geographic Data. Keywords: geographic, map, location, region, geo, spatial, choropleth. Best Chart: Choropleth Map or Bubble Map. Secondary Options: Geographic Heat Map. When to Use: Data has a regional/location dimension; spatial distribution is the core insight for the user. When NOT to Use: Regions have very different sizes making visual comparison misleading (use bar); mobile-primary context. Data Volume Threshold: <1000 regions: SVG; ≥1000: Canvas/WebGL (Deck.gl); global maps: tile-based rendering. Color Guidance: Single color gradient per region group. Categorized colors for discrete types. Legend with clear scale breaks. Accessibility: B — Include text labels for major regions. Provide keyboard navigation between regions.. A11y Fallback: Region text labels; sortable data table by region name and value; keyboard-navigable regions. Library: D3.js, Mapbox, Leaflet. Interactive Level: Pan + Zoom + Drill.