27 lines
23 KiB
CSV
27 lines
23 KiB
CSV
No,Data Type,Keywords,Best Chart Type,Secondary Options,When to Use,When NOT to Use,Data Volume Threshold,Color Guidance,Accessibility Grade,Accessibility Risk,Accessibility Notes,A11y Fallback,Library Recommendation,Interactive Level
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1,Trend Over Time,"trend, time-series, line, growth, timeline, progress, accessible chart, keyboard accessible chart",Line Chart,"Area Chart, Smooth Area",Data has a time axis; user needs to observe rise/fall trends or rate of change over a continuous period,Fewer than 4 data points (use stat card); more than 6 series (visual noise); no time dimension exists,<1000 pts: SVG; ≥1000 pts: Canvas + downsampling; >10000: aggregate to intervals,Primary: #0080FF. Multiple series: distinct colors + distinct line styles. Fill: 20% opacity,deprecated: use Accessibility Risk,risk:low,"Use solid, dashed, and dotted line styles plus direct series labels; never distinguish series by hue alone.",Visible data table plus concise trend summary. Keyboard: focus reveals hover values; +/- buttons zoom; Reset restores the full range.,"Chart.js, Recharts, ApexCharts",Hover + Zoom
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2,Compare Categories,"compare, categories, bar, comparison, ranking, accessible chart, keyboard accessible chart",Bar Chart (Horizontal or Vertical),"Column Chart, Grouped Bar",Comparing discrete categories by magnitude; ranking or ordering is the core insight; categories ≤ 15,Categories > 15 (use table or search); data has time dimension (use line); showing proportions (use waffle/stacked),<20 categories: vertical bar; 20–50: horizontal bar; >50: paginated table,Each bar: distinct color. Grouped: same hue family. Always sort descending by value,deprecated: use Accessibility Risk,risk:low,Use direct category/value labels and group outlines or patterns; never encode category solely by bar color. Do not rely on color alone.,Visible sortable data table plus concise comparison summary. Keyboard: focus reveals hover values; focusable headers with Enter/Space sort and aria-sort reports direction.,"Chart.js, Recharts, D3.js",Hover + Sort
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3,Part-to-Whole,"part-to-whole, pie, donut, percentage, proportion, share, accessible chart, keyboard accessible chart",Pie Chart or Donut,"Stacked Bar, Waffle Chart",≤5 categories; one dominant segment vs rest; emphasis on visual proportion over exact values,Categories > 5; slice differences < 5% (visually indistinguishable); user needs precise values; accessibility-first context,Max 6 slices; beyond that switch to stacked bar 100%,5–6 max colors. Contrasting palette. Largest slice at 12 o'clock. Always label slices with %,deprecated: use Accessibility Risk,risk:high,"Pie charts do not inherently fail WCAG; unlabeled color-only slices are inaccessible. Use direct labels and patterns, with a non-pie fallback. Do not rely on color alone.",Percentage data table and concise part-to-whole summary; offer a stacked bar view. Keyboard: focus reveals slice values; Enter/Space drills in; Back button returns.,"Chart.js, Recharts, D3.js",Hover + Drill
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4,Correlation / Distribution,"correlation, distribution, scatter, relationship, pattern, cluster, accessible chart, keyboard accessible chart",Scatter Plot or Bubble Chart,"Heat Map, Matrix",Exploring relationship between two continuous variables; identifying clusters or outliers in a dataset,Variables are categorical (use grouped bar); fewer than 20 points (patterns aren't meaningful); mobile-primary context,<500 pts: SVG; 500–5000: Canvas at 0.6–0.8 opacity; >5000: hexbin or aggregate first,Color axis: gradient (blue → red). Bubble size: relative to 3rd variable. Opacity: 0.6–0.8 to show density,deprecated: use Accessibility Risk,risk:conditional,Combine marker shapes with direct group labels; color may reinforce but must not be the only distinction.,Visible data table plus correlation summary. Keyboard: focus reveals point values; labeled start/end range inputs replace brush dragging.,"D3.js, Plotly, Recharts",Hover + Brush
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5,Heatmap / Intensity,"heatmap, heat-map, intensity, density, matrix, calendar, accessible chart, keyboard accessible chart",Heat Map or Choropleth,"Grid Heat Map, Bubble Heat","Showing intensity/density across a 2D grid; time-based patterns (e.g., activity by hour × day)",Fewer than 20 cells (use bar); user needs to read exact values; colorblind users without pattern fallback,"Up to 10,000 cells efficiently; beyond that aggregate; calendar heatmap: 365 cells max per SVG",Gradient: Cool (blue) to Hot (red). Divergent scale for ±data. Always include numeric color legend,deprecated: use Accessibility Risk,risk:conditional,Print values or symbols in cells and use texture/labels in addition to the color scale. Do not rely on color alone.,Grid data table plus intensity summary. Keyboard: focus reveals cell values; +/- buttons zoom; Reset restores the grid.,"D3.js, Plotly, ApexCharts",Hover + Zoom
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6,Geographic Data,"geographic, map, location, region, geo, spatial, choropleth, accessible chart, keyboard accessible chart",Choropleth Map or Bubble Map,Geographic Heat Map,Data has a regional/location dimension; spatial distribution is the core insight for the user,Regions have very different sizes making visual comparison misleading (use bar); mobile-primary context,<1000 regions: SVG; ≥1000: Canvas/WebGL (Deck.gl); global maps: tile-based rendering,Single color gradient per region group. Categorized colors for discrete types. Legend with clear scale breaks,deprecated: use Accessibility Risk,risk:conditional,Label regions directly and pair fills with boundaries or patterns; location meaning cannot depend on color alone.,Sortable region table plus geographic summary. Keyboard: arrow keys or labeled pan buttons move the map; +/- buttons zoom; Enter drills into a focused region; Back returns.,"D3.js, Mapbox, Leaflet",Pan + Zoom + Drill
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7,Funnel / Flow,"funnel, flow, conversion, drop-off, pipeline, stages, accessible chart, keyboard accessible chart",Funnel Chart or Sankey,Waterfall (for flows),Sequential multi-stage process; showing conversion or drop-off rates between defined stages,Stages aren't sequential; values don't decrease monotonically (use bar); fewer than 3 stages,3–8 stages optimal; beyond 8 stages group minor steps into 'Other',Stages: single color gradient (start → end). Show conversion % between each stage. Highlight biggest drop,deprecated: use Accessibility Risk,risk:conditional,"Keep stage names and values visible and distinguish stages with text and boundaries, not only a gradient. Do not rely on color alone.",Linear stage table/list plus conversion summary. Keyboard: focus reveals stage values; Enter/Space drills in; Back returns.,"D3.js, Recharts, Custom SVG",Hover + Drill
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8,Performance vs Target,"performance, target, kpi, gauge, goal, threshold, progress, accessible chart, keyboard accessible chart",Gauge Chart or Bullet Chart,"Dial, Thermometer",Single KPI measured against a defined target or threshold; dashboard summary context,No target or benchmark exists; comparing multiple KPIs at once (use bullet chart grid),Single metric per gauge; for 3+ KPIs use bullet chart grid layout,Performance: Red → Yellow → Green gradient. Target: marker line. Threshold zones clearly differentiated,deprecated: use Accessibility Risk,risk:low,Place the number and target text beside the gauge and label threshold zones; red/yellow/green alone is insufficient.,Visible KPI/target text and a one-row data table plus status summary. Keyboard: focus reveals the same detail as hover.,"D3.js, ApexCharts, Custom SVG",Hover
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9,Time-Series Forecast,"forecast, prediction, confidence, band, projection, estimate, accessible chart, keyboard accessible chart",Line with Confidence Band,Ribbon Chart,Historical data + model predictions; communicating uncertainty range to non-technical stakeholders,No historical baseline; prediction confidence is too low to be useful; audience is not data-literate,Keep historical window to 30–90 days for readability; forecast horizon ≤ 30% of visible x-axis range,Actual: solid line #0080FF. Forecast: dashed #FF9500. Confidence band: 15% opacity fill same hue,deprecated: use Accessibility Risk,risk:conditional,"Use solid actual and dashed forecast lines, direct labels, and a named confidence range; hue alone is insufficient.",Visible forecast table plus uncertainty summary. Keyboard: focus reveals hover values; buttons toggle actual/forecast; +/- buttons zoom; Reset restores range.,"Chart.js, ApexCharts, Plotly",Hover + Toggle
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10,Anomaly Detection,"anomaly, outlier, spike, alert, detection, monitoring, deviation, accessible chart, keyboard accessible chart",Line Chart with Highlights,Scatter with Alert,Monitoring a time-series for outliers; alerting users to unexpected spikes or dips in operational data,Anomalies are predefined categories (use bar with highlight); real-time context without a pause control,"Stream at ≤60fps with Canvas; batch: up to 10,000 pts; mark anomalies as a separate data layer",Normal: #0080FF solid line. Anomaly marker: #FF0000 circle + filled. Alert band: #FFF3CD background zone,deprecated: use Accessibility Risk,risk:conditional,Mark anomalies with a distinct shape and text annotation as well as color. Do not rely on color alone.,Anomaly event list/table plus narrative alert summary. Keyboard: focus reveals point details; alerts are available in the persistent list without hover.,"D3.js, Plotly, ApexCharts",Hover + Alert
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11,Hierarchical / Nested Data,"hierarchy, nested, treemap, parent, children, breakdown, drill, accessible chart, keyboard accessible chart",Treemap,"Sunburst, Nested Donut, Icicle","Showing size relationships within a hierarchy; overview of proportional structure (e.g., budget breakdown)",Hierarchy depth > 3 levels (too complex to read); user needs to compare sibling values precisely,<200 nodes: SVG; 200–1000: Canvas; >1000: paginate or pre-filter before rendering,Parent nodes: distinct hues. Children: lighter shades of same hue. White separator borders: 2–3px,deprecated: use Accessibility Risk,risk:high,Label hierarchy nodes and use borders/patterns as well as hue; make the tree table the primary accessible view. Do not rely on color alone.,Collapsible tree table plus hierarchy summary; treemap remains supplementary. Keyboard: focus reveals hover values; Enter/Space drills or expands; Back collapses/returns.,"D3.js, Recharts, ApexCharts",Hover + Drilldown
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12,Flow / Process Data,"flow, process, sankey, distribution, source, target, transfer, accessible chart, keyboard accessible chart",Sankey Diagram,"Alluvial, Chord Diagram",Showing how quantities flow between nodes; multi-source multi-target distribution,Flow directions form loops (use network graph); fewer than 3 source-target pairs; mobile-primary context,<50 flows: SVG; ≥50: Canvas; >200 flows: aggregate minor flows into 'Other' node,Gradient from source to target color. Flow opacity: 0.4–0.6. Node labels always visible,deprecated: use Accessibility Risk,risk:conditional,"Label source, target, and value; use line style or node symbols in addition to gradient color. Do not rely on color alone.",Source-to-target flow table plus flow summary. Keyboard: focus reveals hover values; Enter/Space drills into a node; Back returns.,"D3.js (d3-sankey), Plotly",Hover + Drilldown
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13,Cumulative Changes,"waterfall, cumulative, variance, incremental, bridge, delta, accessible chart, keyboard accessible chart",Waterfall Chart,"Stacked Bar, Cascade","Showing how individual positive/negative components add up to a final total (e.g., P&L, budget variance)",Changes are not additive; more than 12 bars (readability breaks); audience expects a simple total,4–12 bars optimal; beyond 12 aggregate minor items into a single 'Other' bar,Increases: #4CAF50. Decreases: #F44336. Start total: #2196F3. End total: #0D47A1. Running total line: dashed,deprecated: use Accessibility Risk,risk:low,"Pair increase/decrease bars with signed values and directional icons, not red/green alone. Do not rely on color alone.",Running-total table plus variance summary. Keyboard: focus reveals the same value as hover.,"ApexCharts, Highcharts, Plotly",Hover
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14,Multi-Variable Comparison,"radar, spider, multi-variable, attributes, dimensions, comparison, accessible chart, keyboard accessible chart",Radar / Spider Chart,"Parallel Coordinates, Grouped Bar","Comparing multiple entities across the same fixed set of attributes (e.g., product feature comparison)",Axes > 8 (unreadable); values need precise comparison (use grouped bar); audience unfamiliar with radar charts,2–3 datasets maximum per chart; 5–8 axes; beyond 8 axes switch to parallel coordinates,Single dataset: #0080FF at 20% fill. Multiple: distinct hues with 30% fill. Border: full opacity,deprecated: use Accessibility Risk,risk:conditional,"Use line styles, point shapes, and direct series labels in addition to color. Do not rely on color alone.",Raw data table and grouped-bar alternative plus comparison summary. Keyboard: focus reveals values; buttons toggle series.,"Chart.js, Recharts, ApexCharts",Hover + Toggle
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15,Stock / Trading OHLC,"stock, trading, ohlc, candlestick, finance, price, volume, accessible chart, keyboard accessible chart",Candlestick Chart,"OHLC Bar, Heikin-Ashi",Financial time-series with Open/High/Low/Close data; trading or investment product context only,Non-financial audience; no OHLC data available (use line chart); accessibility-first context,Real-time: Canvas required. Historical: paginate by time range. Max 500 candles visible at once,Bullish: #26A69A. Bearish: #EF5350. Volume bars: 40% opacity below. Body fill vs hollow for OHLC style,deprecated: use Accessibility Risk,risk:conditional,Use filled versus hollow candles and OHLC text values; bullish/bearish meaning cannot depend on color. Do not rely on color alone.,Sortable OHLC table plus daily-change summary. Keyboard: focus reveals candle values; +/- buttons zoom; Reset restores range; live updates do not steal focus.,"Lightweight Charts (TradingView), ApexCharts",Real-time + Hover + Zoom
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16,Relationship / Connection Data,"network, graph, nodes, edges, connections, relationships, force, accessible chart, keyboard accessible chart",Network Graph,"Hierarchical Tree, Adjacency Matrix",Mapping connections between entities; network topology or social graph exploration context,Node count > 500 without clustering pre-applied; user needs precise connection counts; mobile context,≤100 nodes: SVG; 101–500: Canvas; >500: must apply clustering/LOD before rendering,Node types: categorical colors. Edges: #90A4AE at 60% opacity. Highlight path: #F59E0B,deprecated: use Accessibility Risk,risk:high,"Use labeled node types, shapes, and edge styles in addition to color; the adjacency view is the accessible source of truth. Do not rely on color alone.",Adjacency list/table and relationship summary; tree view when applicable. Keyboard: focus reveals node details; Enter drills; Move up/down/left/right buttons replace drag.,"D3.js (d3-force), Vis.js, Cytoscape.js",Drilldown + Hover + Drag
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17,Distribution / Statistical,"distribution, statistical, spread, median, outlier, quartile, boxplot, accessible chart, keyboard accessible chart",Box Plot,"Violin Plot, Beeswarm","Showing spread, median, and outliers of a dataset; comparing distributions across multiple groups",Fewer than 20 data points per group (distribution is not meaningful); audience unfamiliar with statistical charts,Any sample size; aggregated representation so rendering is ⚡ Excellent at any volume,Box fill: #BBDEFB. Border: #1976D2. Median line: #D32F2F bold. Outlier dots: #F44336,deprecated: use Accessibility Risk,risk:low,"Label median, quartiles, whiskers, and outliers directly; do not use color alone for statistical roles.",Statistics table plus distribution summary. Keyboard: focus reveals the same statistics as hover.,"Plotly, D3.js, Chart.js (plugin)",Hover
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18,Performance vs Target (Compact),"bullet, compact, kpi, dashboard, target, benchmark, range, accessible chart, keyboard accessible chart",Bullet Chart,"Gauge, Progress Bar",Dashboard with multiple KPIs side by side; space-constrained contexts where a gauge is too large,Single KPI with emphasis (use gauge); data has no defined target range; fewer than 3 KPIs,Ideal for 3–10 bullet charts in a grid; scales to any count efficiently,Qualitative ranges: #FFCDD2 / #FFF9C4 / #C8E6C9 (bad/ok/good). Performance bar: #1976D2. Target: black 3px marker,deprecated: use Accessibility Risk,risk:low,Label every qualitative range and target with text; color is supplementary.,Visible KPI/target table plus status summary. Keyboard: focus reveals the same detail as hover.,"D3.js, Plotly, Custom SVG",Hover
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19,Proportional / Percentage,"waffle, percentage, proportion, progress, filled, grid, accessible chart, keyboard accessible chart",Waffle Chart,"Pictogram, Stacked Bar 100%",Showing what fraction of a whole is filled; percentage progress in a visually engaging and accessible format,More than 5 categories (use stacked bar); exact values matter over visual proportion; very tight space,10×10 grid standard (100 cells); for > 5 categories switch to stacked 100% bar,3–5 categories max. 2–3px gap between cells. Each category a distinct accessible color pair,deprecated: use Accessibility Risk,risk:low,Label each category and percentage and add patterns or symbols; filled-cell color alone is insufficient.,Percentage table/list plus part-to-whole summary. Keyboard: focus reveals each cell value.,"D3.js, React-Waffle, Custom CSS Grid",Hover
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20,Hierarchical Proportional,"sunburst, hierarchy, nested, proportion, radial, circle, accessible chart, keyboard accessible chart",Sunburst Chart,"Treemap, Icicle, Circle Packing","Exploring nested proportions where both hierarchy and relative size matter (e.g., org spend breakdown)",More than 3 hierarchy levels (outer rings become unreadable); precision matters over overview; mobile,<100 nodes: SVG; 100–500: Canvas; >500: filter to top N before rendering,Center to outer: darker to lighter hue. Each level 15–20% lighter. Contrasting border between sectors,deprecated: use Accessibility Risk,risk:high,Label hierarchy levels and segments and use boundaries/patterns as well as hue; the indented list is primary. Do not rely on color alone.,Collapsible indented list/table plus hierarchy summary and breadcrumbs. Keyboard: Enter/Space drills or expands; Back button returns; focus reveals hover detail.,"D3.js (d3-hierarchy), Recharts, ApexCharts",Drilldown + Hover
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21,Root Cause Analysis,"root cause, decomposition, tree, hierarchy, drill-down, ai-split, attribution, accessible chart, keyboard accessible chart",Decomposition Tree,"Decision Tree, Flow Chart",Decomposing a metric into contributing factors; AI-assisted analysis or BI drill-down scenarios,No clear parent-child causal relationship; audience expects a summary rather than exploration,Up to 5 levels deep; limit visible nodes to 20 per level for readability; lazy-load deeper levels,Positive impact nodes: #2563EB. Negative impact nodes: #EF4444. Neutral connectors: #94A3B8,deprecated: use Accessibility Risk,risk:low,Name each node and contribution and use shapes/connector styles in addition to color. Do not rely on color alone.,Expandable tree table plus root-cause summary. Keyboard: Enter/Space drills and expands; Back collapses; dedicated expand/collapse buttons expose the same operations.,"Power BI (native), React-Flow, Custom D3.js",Drill + Expand
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22,3D Spatial Data,"3d, spatial, immersive, terrain, molecular, volumetric, point-cloud, accessible chart, keyboard accessible chart",3D Scatter / Surface Plot,"Volumetric Rendering, Point Cloud",Scientific/engineering context where Z-axis carries essential info not expressible in 2D,2D projection conveys the same insight; mobile context; accessibility-required environments; standard business dashboards,"WebGL required. Deck.gl: up to 1M points. Three.js: LOD required beyond 50,000 pts",Depth cues: lighting and shading. Z-axis: color gradient (cool → warm). Transparent overlapping: opacity 0.4,deprecated: use Accessibility Risk,risk:high,"Use labels, shapes, and depth-independent cues; color and 3D position cannot be the only carriers of meaning.","Mandatory 2D projection, data table, and spatial summary. Keyboard: rotate/pan buttons and +/- zoom controls replace pointer/VR manipulation; Reset returns the camera.","Three.js, Deck.gl, Plotly 3D",Rotate + Zoom + VR
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23,Real-Time Streaming,"streaming, real-time, ticker, live, velocity, pulse, monitoring, accessible chart, keyboard accessible chart",Streaming Area Chart,"Ticker Tape, Moving Gauge",Live monitoring dashboards; IoT/ops data updating at ≥1 Hz; user needs current value at a glance,Update frequency < 1/min (use periodic-refresh line chart); flashing content without reduced-motion support,Canvas/WebGL required. Buffer last 60–300s of data. Downsample older data on scroll,Current pulse: #00FF00 (dark theme) or #0080FF (light theme). History: fading opacity. Grid: dark background,deprecated: use Accessibility Risk,risk:conditional,Show the current value and status text and use line styles or markers in addition to color. Do not rely on color alone.,Streaming data table plus current-value/trend summary. Keyboard: Pause/Resume button controls updates; focus reveals values; +/- buttons zoom; Reset restores range.,"Smoothed D3.js, CanvasJS",Real-time + Pause + Zoom
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24,Sentiment / Emotion,"sentiment, emotion, nlp, opinion, feeling, text-analysis, accessible chart, keyboard accessible chart",Word Cloud with Sentiment,"Sentiment Arc, Radar Chart",NLP output visualization; exploratory analysis of text corpus sentiment; frequency-weighted keyword overview,Precise values matter (word size is inherently imprecise); screen-reader context; corpus < 50 items,50–5000 terms optimal. Beyond 5000: apply top-N filtering before render. Avoid on mobile,Positive: #22C55E. Negative: #EF4444. Neutral: #94A3B8. Word size maps to frequency,deprecated: use Accessibility Risk,risk:high,"Expose every term, count, and sentiment as text; size and color are supplementary only.",Sortable term table/list plus sentiment summary; word cloud is supplementary. Keyboard: focus reveals word details; labeled controls filter with Space/Enter.,"D3-cloud, Highcharts, Nivo",Hover + Filter
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25,Process Mining,"process, mining, variants, path, bottleneck, log, event, accessible chart, keyboard accessible chart",Process Map / Graph,"Directed Acyclic Graph (DAG), Petri Net",Analyzing event logs to visualize actual process flows; identifying bottlenecks and deviations in ops/product funnels,No event log data available; audience expects a static flowchart (use diagram tool); node count > 100 without pre-filtering,<30 nodes: SVG; 30–100: Canvas; >100: apply variant filtering (top 80% of cases) before rendering,Happy path: #10B981 thick line. Deviations: #F59E0B thin line. Bottleneck nodes: #EF4444 fill,deprecated: use Accessibility Risk,risk:conditional,Label nodes and paths and use shapes/line styles in addition to color; bottlenecks require text annotations. Do not rely on color alone.,Path summary table plus bottleneck narrative. Keyboard: Move buttons replace drag; focus reveals node details; Enter activates a node; Back returns.,"React-Flow, Cytoscape.js, Recharts",Drag + Node-Click
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