## Snap a coordinate to the nearest road

`NearestResult Routing.NearestPost(RoutingNearestPostParamsparameters, CancellationTokencancellationToken = default)`

**post** `/api/v1/nearest`

Snap a coordinate to the nearest road

### Parameters

- `RoutingNearestPostParams parameters`

  - `required Double lat`

    Latitude

  - `required Double lng`

    Longitude

  - `string outputFields`

    Comma-separated property fields to include

  - `string outputInclude`

    Extra computed fields: bbox, distance, center

  - `Long outputPrecision`

    Coordinate decimal precision (1-15, default 7)

  - `Long radius`

    Search radius in meters (default 500, max 5000)

### Returns

- `class NearestResult:`

  GeoJSON Point Feature representing the nearest point on the road network to the input coordinate. Used for snapping GPS coordinates to roads.

  - `required GeoJsonGeometry Geometry`

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

    - `required Coordinates Coordinates`

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

      - `IReadOnlyList<Double>`

      - `IReadOnlyList<IReadOnlyList<Double>>`

      - `IReadOnlyList<IReadOnlyList<IReadOnlyList<Double>>>`

      - `IReadOnlyList<IReadOnlyList<IReadOnlyList<IReadOnlyList<Double>>>>`

    - `required Type Type`

      Geometry type

      - `"Point"Point`

      - `"LineString"LineString`

      - `"Polygon"Polygon`

      - `"MultiPoint"MultiPoint`

      - `"MultiLineString"MultiLineString`

      - `"MultiPolygon"MultiPolygon`

  - `required Properties Properties`

    Snap result metadata

    - `Double DistanceM`

      Distance from the input coordinate to the snapped point in meters

    - `Long EdgeID`

      ID of the road network edge that was snapped to

    - `Double EdgeLengthM`

      Length of the matched road edge in meters

    - `string? Highway`

      OSM highway tag value (e.g. `residential`, `primary`, `motorway`)

    - `Long OsmWayID`

      OSM way ID of the matched road segment

    - `string? Surface`

      OSM surface tag value (e.g. `asphalt`, `gravel`, `paved`)

  - `required Type Type`

    - `"Feature"Feature`

### Example

```csharp
RoutingNearestPostParams parameters = new()
{
    Lat = 0,
    Lng = 0,
};

var nearestResult = await client.Routing.NearestPost(parameters);

Console.WriteLine(nearestResult);
```

#### Response

```json
{
  "geometry": {
    "coordinates": [
      2.3522,
      48.8566
    ],
    "type": "Point"
  },
  "properties": {
    "distance_m": 12.4,
    "edge_id": 0,
    "edge_length_m": 0,
    "highway": "highway",
    "osm_way_id": 0,
    "surface": "surface"
  },
  "type": "Feature"
}
```