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

# Flow map

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: Crates shipped between the same made-up towns.

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.

## `flow_map`

![Flow map of origin→destination flows.](https://oods-foundry.com/charts/svg/flow_map-light.svg)

light `sha256:00313f4ee2fc…`drawn live from its spec

![Flow map of origin→destination flows.](https://oods-foundry.com/charts/svg/flow_map-dark.svg)

dark `sha256:048683f6881e…`drawn live from its spec

![Flow map of origin→destination flows.](https://oods-foundry.com/charts/svg/flow_map-hc.svg)

high contrast `sha256:ae262750aec1…`drawn live from its spec

## Certified: 4 results

`artifact_certify` on `flow_map`, 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

Flow map covers 4 data points totaling 70 crates.

- High crates: crates 30 (Feature 1)
- Low crates: crates 8 (Feature 4)
- Total crates: 70

### Its data table

Data table for Visualization

| Feature | From | To | From Lon | From Lat | To Lon | To Lat | Crates |
| - | - | - | - | - | - | - | - |
| Feature 1 | Carrow | Ashford | 5 | 5 | 5 | 15 | 30 |
| Feature 2 | Carrow | Dunmore | 5 | 5 | 15 | 5 | 12 |
| Feature 3 | Ashford | Brook | 5 | 15 | 15 | 15 | 20 |
| Feature 4 | Dunmore | Brook | 15 | 5 | 15 | 15 | 8 |

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 … }
}
```