Chart Catalogue Implementation Tracker

This tracker follows the Data Visualisation Catalogue chart types selected for the chart compiler gallery. It is intentionally rough: use it to see whether a chart has documentation, reference assets, a compiler spec, and any remaining faithfulness gaps.

Source review: README.md

Status Key

Status	Meaning
Implemented	Present in `createGalleryChartSpecs()` and renderable in the chart compiler gallery.
Partial	Renderable, but an important catalogue feature is approximated or missing.
Planned	Documented and selected, but not implemented in the gallery yet.

Selected Catalogue Charts

Chart	Status	Gallery id	Spec/doc	Reference assets	Notes
Arc Diagram	Partial	`arcDiagram`	arc-diagram.md	No local reference asset yet	Raw source-target rows compile into ordered nodes and weighted cubic arc paths; richer ordering and directed-edge policies remain follow-ups.
Area Graph	Implemented	`areaGraph`	area-graph.md	Reference and anatomy PNGs	Uses a filled `path` closed to zero plus a separate trend-edge path. Stacked-area behavior remains out of scope.
Bar Chart	Implemented	`bar`	bar-chart.md	Reference and anatomy PNGs	Existing rect/band/linear bar example relabeled and positioned as the catalogue bar-chart target.
Box & Whisker Plot	Implemented	`boxWhisker`	Compiler gap analysis	No local reference asset yet	Raw observations compile to quartile summaries, whiskers, caps, and median marks. Outlier extraction remains a follow-up.
Bubble Chart	Implemented	`bubbleChart`	bubble-chart.md	Reference and anatomy PNGs	Uses a first-class `sqrt` scale for area-correct radius mapping.
Bullet Graph	Implemented	`bulletGraph`	bullet-graph.md	No local reference asset yet	Raw threshold rows compile into qualitative range bands, actual measure bars, and target markers.
Calendar	Implemented	`calendar`	calendar.md	No local reference asset yet	Raw dated rows compile through `calendarMonth` layout into weekday/week cells with a generated color legend.
Candlestick Chart	Implemented	`candlestickChart`	candlestick-chart.md	No local reference asset yet	Raw ordered dated prices compile through `financialInterval` into OHLC rows, then render on a `time` scale as wick lines and candle bodies.
Circle Packing	Partial	`circlePacking`	circle-packing.md	No local reference asset yet	Raw parent-child rows compile through `hierarchy` and `circlePack` layout into nested circle geometry; optimal packing remains a follow-up.
Density Plot	Implemented	`densityPlot`	density-plot.md	No local reference asset yet	Raw observations compile through `density` into sampled curve rows rendered as a baseline-filled path.
Donut Chart	Implemented	`donutChart`	donut-chart.md	No local reference asset yet	Raw category values compile through `polarSectors` into annular paths, percentage labels, and legend entries.
Dot Matrix Chart	Implemented	`dotMatrixChart`	dot-matrix-chart.md	No local reference asset yet	Raw category counts compile through `dotMatrix` layout into repeated point glyph rows.
Error Bars	Implemented	`errorBars`	error-bars.md	No local reference asset yet	Raw grouped observations compile through `errorInterval` into means and confidence-style bounds.
Gantt Chart	Implemented	`ganttChart`	gantt-chart.md	No local reference asset yet	Raw start/end date rows compile through `interval` into timeline bars on a generated date axis.
Heatmap	Implemented	`heatmap`	heatmap.md	Reference and anatomy SVGs	Existing matrix rect example maps directly to the catalogue chart. Continuous gradients are not implemented; discrete sequential steps are used.
Histogram	Implemented	`histogram`	histogram.md	Reference and anatomy PNGs	Raw rows compile through `bin`; bars render on a linear x scale with `min`/`max` interval geometry.
Line Graph	Implemented	`line`	line-graph.md	Reference and anatomy PNGs	Existing path and sampled point example maps to the catalogue line graph.
Marimekko Chart	Implemented	`marimekkoChart`	marimekko-chart.md	No local reference asset yet	Raw category/series values compile through `mosaic` layout into variable-width stacked rectangles.
Multi-set Bar Chart	Implemented	`multiSetBar`	multi-set-bar-chart.md	Reference and anatomy PNGs	Raw category/series rows compile through grouped layout to produce inner offsets and group centers.
Nightingale Rose Chart	Implemented	`nightingaleRoseChart`	nightingale-rose-chart.md	No local reference asset yet	Equal-angle `polarSectors` layout derives value-sized radial sector paths from raw category values.
Open-high-low-close Chart	Implemented	`openHighLowClose`	open-high-low-close-chart.md	No local reference asset yet	Reuses the `financialInterval` OHLC table and renders dated high-low stems with open/close ticks.
Parallel Coordinates Plot	Implemented	`parallelCoordinates`	parallel-coordinates-plot.md	No local reference asset yet	Raw multivariate observations compile into per-axis guide rows, ticks, and grouped polyline points.
Pie Chart	Implemented	`pieChart`	pie-chart.md	No local reference asset yet	Raw category values compile through `polarSectors` into proportional wedge paths and percentage labels.
Population Pyramid	Implemented	`populationPyramid`	population-pyramid.md	No local reference asset yet	Raw positive cohort values compile through diverging layout into signed left/right bars on a symmetric axis.
Proportional Area Chart	Implemented	`proportionalAreaChart`	proportional-area-chart.md	No local reference asset yet	Raw category values resolve through a `sqrt` radius scale, with a compiler-generated size legend.
Radar Chart	Implemented	`radarChart`	radar-chart.md	No local reference asset yet	Raw series/metric rows compile into radial axes, guide rings, closed profile polygons, and vertex points.
Radial Bar Chart	Implemented	`radialBarChart`	radial-bar-chart.md	No local reference asset yet	Raw category values compile into concentric tracks and value sweep arcs.
Radial Column Chart	Implemented	`radialColumnChart`	radial-column-chart.md	No local reference asset yet	Equal-angle `polarSectors` layout derives annular columns with a visible inner baseline.
Scatterplot	Implemented	`scatterplot`	scatterplot.md	Reference and anatomy PNGs	Uses point glyphs on two linear scales plus a compiler-generated regression path.
Span Chart	Implemented	`spanChart`	span-chart.md	No local reference asset yet	Raw paired values compile through `interval` and render as line spans with endpoint symbols.
Stacked Area Graph	Implemented	`stackedAreaGraph`	stacked-area-graph.md	No local reference asset yet	Raw period/series rows compile through `stack`; filled path bands render between generated `start` and `end` boundaries.
Stacked Bar Graph	Implemented	`stacked`	stacked-bar-graph.md	Reference and anatomy PNGs	Existing stack segment geometry maps directly to the catalogue simple stacked bar. 100 percent stack mode remains a follow-up.
Stream Graph	Implemented	`streamGraph`	stream-graph.md	No local reference asset yet	Raw period/series rows compile through `stack` stream mode; smooth area-band paths render centered flowing layers.
Sunburst Diagram	Partial	`sunburstDiagram`	sunburst-diagram.md	No local reference asset yet	Raw parent-child rows compile through `hierarchy` and `sunburstSectors` layout into annular path sectors.
Timeline	Implemented	`timeline`	timeline.md	No local reference asset yet	Dated events render through the first-class `time` scale and generated date axis.
Timetable	Implemented	`timetable`	timetable.md	No local reference asset yet	Raw day/time events compile into grid cells, day headers, and duration-aware event blocks.
Treemap	Partial	`treemap`	treemap.md	Reference and anatomy PNGs	Flat raw metric rows compile through a squarified treemap transform; nested hierarchy remains a follow-up.
Tree Diagram	Partial	`treeDiagram`	tree-diagram.md	No local reference asset yet	Raw parent-child rows compile through `hierarchy`, `treeNodes`, and `treeLinks` layouts into node/link geometry.
Violin Plot	Implemented	`violinPlot`	violin-plot.md	No local reference asset yet	Raw grouped observations compile through `violin` layout into mirrored density paths, medians, and IQR guides.

Current Gallery Coverage

The selected catalogue charts are listed first in the compiler gallery via app/src/lib/viz/compiler/gallery-specs.ts:

arcDiagram
areaGraph
bar
boxWhisker
bubbleChart
bulletGraph
calendar
candlestickChart
circlePacking
densityPlot
donutChart
dotMatrixChart
errorBars
ganttChart
heatmap
histogram
line
marimekkoChart
multiSetBar
openHighLowClose
nightingaleRoseChart
parallelCoordinates
pieChart
populationPyramid
proportionalAreaChart
radarChart
radialBarChart
radialColumnChart
scatterplot
spanChart
stackedAreaGraph
stacked
streamGraph
sunburstDiagram
timeline
timetable
treemap
treeDiagram
violinPlot

Existing non-catalogue support surfaces remain after those entries: KPI, generic point stress, overview brush, small multiples, symbol map, and product table.

Next Fidelity Work

Priority	Work
High	Add richer interval labels for histogram axes and richer calendar/session formatting for temporal axes.
High	Generalize the grouped-bar layout into nested band scales or broader categorical layout transforms.
High	Generalize first-pass hierarchy layouts into reusable stratify/tree/partition/pack families with stronger layout policies.
High	Extend calendar, mosaic, dot-matrix, bullet, parallel-coordinate, and timetable layouts with ordering, responsive packing, and label-hiding policies.
Medium	Generalize radar, radial-bar, and arc-diagram layouts into broader polar-coordinate and edge-list layout families.
Medium	Add richer legend layouts, including continuous color ramps and collision-aware placement.
Medium	Add 100 percent normalization mode coverage to stacked bar and stacked area gallery examples.
Medium	Add richer path interpolation policies beyond the first smooth/step pass, including stream-specific ordering/baseline policies.
Medium	Add financial/session formatting for Candlestick and OHLC charts, and date-span support for Span Chart.
Medium	Add polar guide rings, polar labels, and collision policies for pie/donut/radial sector charts.
Medium	Upgrade treemap layout from flat squarified rows to nested hierarchy rows.
Low	Add local reference/anatomy assets for newly added box, Gantt, population pyramid, proportional area, stacked area, stream, error bars, candlestick, OHLC, span, density, timeline, pie, donut, Nightingale rose, radial bar, radial column, radar, arc diagram, violin, bullet, parallel-coordinate, timetable, circle packing, sunburst, and tree examples.

Verification Log