# `Sidereon.Terrain.MmapTerrain.EllipsoidalHeightM`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/terrain/mmap_terrain.ex#L152)

WGS84 ellipsoidal terrain height `h` in metres.

# `t`

```elixir
@type t() :: %Sidereon.Terrain.MmapTerrain.EllipsoidalHeightM{value_m: float()}
```

Ellipsoidal height `h` in metres above the WGS84 ellipsoid.

# `metres`

```elixir
@spec metres(t()) :: float()
```

Return the ellipsoidal height `h` in metres.

# `new`

```elixir
@spec new(number()) :: t()
```

Build an ellipsoidal height `h` in metres.

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