# `Sidereon.Terrain.MmapTerrain.VerticalDatum`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/terrain/mmap_terrain.ex#L50)

Vertical datum carried by terrain store tile records.

# `t`

```elixir
@type t() :: :egm96_msl_orthometric
```

Orthometric height above the EGM96 mean sea level geoid.

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