[Charts](https://oods-foundry.com/charts) / Choropleth

# Choropleth

Rendered by viz_render in OODS Foundry 0.10.1, in each theme, from sample data this site supplies.

Generated from @oods/foundry 0.10.1

No named pattern draws this type, so this site supplies the data: Orders by region, in four made-up square regions.

Each chart is drawn live in your browser from the spec viz_render returned with it, so you can point at its marks. The SVG viz_render returned is the record: its hash is under each chart, and it shows where a live drawing would differ from it.

## `choropleth`

![Choropleth map of regional values.](https://oods-foundry.com/charts/svg/choropleth-light.svg)

light `sha256:b2402d89691a…`drawn live from its spec

![Choropleth map of regional values.](https://oods-foundry.com/charts/svg/choropleth-dark.svg)

dark `sha256:ad6cccd25c80…`drawn live from its spec

![Choropleth map of regional values.](https://oods-foundry.com/charts/svg/choropleth-hc.svg)

high contrast `sha256:aa8f31481d11…`drawn live from its spec

## Certified: 4 results

`artifact_certify` on `choropleth`, drawn in light: coverage `certified`, conformant `true`.

- accessibility equivalence `a11yEquivalence`

  `pass`

- determinism `determinism`

  `pass`

- contrast `contrast`

  `exempt`

- accuracy `accuracy`

  `pass`

### Findings

- `OODS-A11Y-R-14` (warn) Set portability.tableColumnOrder when rendering tables with more than two columns.

**Contrast:** Geo carrier paints were read from the rendered ECharts SVG, but geo color remains exempt from categorical contrast grading under the standing gradient-essential ruling. certify reads actual carrier paints from the normalized SVG rendered from the retained projected ECharts option. Geo categorical contrast remains exempt, so no canvas ratio is graded. Scope: light/A.

### Its narrative

Choropleth map covers 4 data points totaling 100 orders.

- High orders: orders 42 (Northwest)
- Low orders: orders 9 (Southeast)
- Total orders: 100

### Its data table

Data table for Visualization

| Feature | Region | Orders |
| - | - | - |
| Northwest | Northwest | 42 |
| Northeast | Northeast | 18 |
| Southwest | Southwest | 31 |
| Southeast | Southeast | 9 |

Certification covers charts only: it measures the chart's specification. A pass means no offered rule found a problem, not a general promise. An ECharts type certifies only when its data is supplied.

The call

```
{
  "brand": "A",
  "theme": "light",
  "spec": { … the normalized spec viz_render returned … },
  "data": { … the same data it drew … }
}
```