# `GeoGenius.Published.AreaRelation`
[🔗](https://github.com/agoodway/geo_genius/blob/main/lib/geo_genius/published/area_relation.ex#L1)

One parent-to-child edge among areas of a release, as
`published_area_relations` and its release-scoped base `release_relations`
project it.

Read-only. `intersection_area_m2`, `parent_coverage` and `child_coverage`
carry a value only for a measured relation; all three are null for one
asserted from source data. `parent_coverage` and `child_coverage` are ratios
from 0 to 1, not the percentages `GeoGenius.AreaMatch` reports.

# `t`

```elixir
@type t() :: %GeoGenius.Published.AreaRelation{
  __meta__: term(),
  child_area_id: Ecto.UUID.t() | nil,
  child_area_key: String.t() | nil,
  child_coverage: Decimal.t() | nil,
  collection_key: String.t() | nil,
  intersection_area_m2: Decimal.t() | nil,
  parent_area_id: Ecto.UUID.t() | nil,
  parent_area_key: String.t() | nil,
  parent_coverage: Decimal.t() | nil,
  relation_type: String.t() | nil,
  release_id: Ecto.UUID.t() | nil
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*