315 charts. Each chart has SVG, Vega-Lite, ECharts, Plotly, Observable Plot outputs. Curated presentation set with portable library specs.
| Rank | System | Best For | Recommendation |
|---|---|---|---|
| 1 | SVG | Immediate presentation, static export, offline reliability | Use for the City Hall presentation and static pages |
| 2 | ECharts | Interactive dashboards, tooltips, large category charts, heatmaps | Use for the production interactive charting layer |
| 3 | Vega-Lite | Declarative chart specs, reproducible analysis, quick iteration | Use as the canonical portable chart spec |
| 4 | Observable Plot | Analytical notebooks and fast exploratory visualization | Use for analysis notebooks and prototypes |
| 5 | Plotly | Exploratory charts with zoom, hover, and quick sharing | Keep as an export target for analyst handoff |