# `Latitude`

Degrees north of the equator in WGS84, from -90 to 90, held as written: `51.5072`, shown `51.5072° N`.

[Geospatial](types.md#geospatial); ordered; since Jadpo 0.1.0.

## Make one

It is a `Decimal` with bounds of its own: build one as you build a `Decimal`, and a value outside its bounds breaks `min` or `max`.

`text.parse(raw, as: Latitude)` reads one from its text; text that isn't one at all fails `malformed`, such as `51.5072 N`, `N51.5072` or `51,5072`.

## Text, JSON and storage

`text.from` writes its canonical text, the one form `text.parse` reads back. JSON sends its canonical text as a string.

| Text | JSON |
|---|---|
| `-90` | `"-90"` |
| `-33.8688` | `"-33.8688"` |
| `0` | `"0"` |
| `51.5072` | `"51.5072"` |
| `90` | `"90"` |

It is stored in one column named for the field, of type `numeric`. `0` is stored as `0`.

## Shown to people

`text.format(value, locale:)` shows it to people in their locale.

With `locale: Locale.en_gb`:

| Value | Shown |
|---|---|
| `-90` | `90° S` |
| `-33.8688` | `33.8688° S` |
| `0` | `0°` |
| `51.5072` | `51.5072° N` |
| `90` | `90° N` |

## Operations

It has the contract's own operations: `text.parse`, `text.from`, `text.format`, `json.read`, `json.write` and `==`. It is ordered, so `<` and sorting take it. [Every standard type meets one contract](../topics/every-standard-type-meets-one-contract.md) says how they work.