# Client

## Domain Types

### Error

- `Error`

  - `Error error`

    Error payload

### Feature Collection

- `FeatureCollection`

  - `list<GeoJsonFeature> features`

    Array of GeoJSON Feature objects

  - `Type type`

    Always `FeatureCollection`

### Geo Json Feature

- `GeoJsonFeature`

  - `GeoJsonGeometry geometry`

    GeoJSON Geometry object per RFC 7946. Coordinates use [longitude, latitude] order. 3D coordinates [lng, lat, elevation] are used for elevation endpoints.

  - `array<string,mixed> properties`

    OSM tags flattened as key-value pairs, plus `@type` (node/way/relation) and `@id` (OSM ID) metadata fields. May include `distance_m` for proximity queries.

  - `Type type`

    Always `Feature`

  - `?string id`

    Compound identifier in `type/osm_id` format

### Geo Json Geometry

- `GeoJsonGeometry`

  - `Coordinates coordinates`

    Coordinates array. Nesting depth varies by geometry type: Point = [lng, lat], LineString = [[lng, lat], ...], Polygon = [[[lng, lat], ...], ...], etc.

  - `Type type`

    Geometry type