O Roads API toma até 100 instâncias coordenadas e retorna o segmento da via mais próxima de cada ponto. Os pontos transmitidos não precisam fazer parte de um caminho contínuo.
Se você estiver trabalhando com pontos sequenciais de GPS, use Snap to Roads.
Solicitações
Uma solicitação para as vias mais próximas deve ser enviada via HTTPS e leva o seguinte formulário:
https://roads.googleapis.com/v1/nearestRoads?parameters&key=YOUR_API_KEY
Required parameters
points
The points to be snapped. The points parameter accepts a list of latitude/longitude pairs. Separate latitude and longitude values with commas. Separate coordinates with the pipe character: "|". For example:
points=60.170880,24.942795|60.170879,24.942796|60.170877,24.942796.
Exemplos
A solicitação a seguir retorna um conjunto de trechos de via com base no lista de coordenadas.
URL
https://roads.googleapis.com/v1/nearestRoads ?points=60.170880%2C24.942795%7C60.170879%2C24.942796%7C60.170877%2C24.942796 &key=YOUR_API_KEY
cURL
curl -L -X GET 'https://roads.googleapis.com/v1/nearestRoads?points=60.170880%2C24.942795%7C60.170879%2C24.942796%7C60.170877%2C24.942796&key=YOUR_API_KEY'
Respostas
Para cada solicitação válida, o Roads API vai retornar uma resposta no formato indicado no URL da solicitação.
{ "snappedPoints": [ { "location": { "latitude": 60.170878428876755, "longitude": 24.94269540970182 }, "originalIndex": 0, "placeId": "ChIJfVFHrM0LkkYRBzUQos_jR5w", }, { "location": { "latitude": 60.17087741412199, "longitude": 24.942695474405202 }, "originalIndex": 1, "placeId": "ChIJfVFHrM0LkkYRBzUQos_jR5w", }, { "location": { "latitude": 60.170875416131736, "longitude": 24.942695601802203 }, "originalIndex": 2, "placeId": "ChIJfVFHrM0LkkYRBzUQos_jR5w", }, ], }
A resposta usa o esquema a seguir.
NearestRoadsResponse
| Field | Required | Type | Description |
|---|---|---|---|
| optional | Array<SnappedPoint> | An array of snapped points. Sometimes containing several snapped points for the same point with differing placeId or location. See SnappedPoint for more information. |
SnappedPoint
| Field | Required | Type | Description |
|---|---|---|---|
| required | LatitudeLongitudeLiteral | See LatitudeLongitudeLiteral for more information. |
| required | string | A unique identifier for a place. All place IDs returned by the Roads API correspond to road segments. |
| optional | number |
An integer that indicates the corresponding value in the original
request. Each value in the request should map to a snapped value in
the response. However, if you've set interpolate=true or if you're
using nearest roads, then it's possible that the response will
contain more coordinates than the request. Interpolated values will
not have an |
LatitudeLongitudeLiteral
An object describing a specific location with Latitude and Longitude in decimal degrees.
| Field | Required | Type | Description |
|---|---|---|---|
| required | number | Latitude in decimal degrees |
| required | number | Longitude in decimal degrees |