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Edit: /srv/osrm/osrm-backend/docs/http.md (66483B)

# OSRM HTTP server

The built-in HTTP server is a basic HTTP/1.0 server that supports a 'keep-alive' extension. Persistent connections are limited to 512 requests per
connection and allow no more than 5 seconds between requests.

## General options

All OSRM HTTP requests use a common structure.

The following syntax applies to all services, except as noted.

### Requests

```endpoint
GET /{service}/{version}/{profile}/{coordinates}[.{format}]?option=value&option=value
```

| Parameter | Description |
| --- | --- |
| `service` | One of the following values: [`route`](#route-service), [`nearest`](#nearest-service), [`table`](#table-service), [`match`](#match-service), [`trip`](#trip-service), [`tile`](#tile-service) |
| `version` | Version of the protocol implemented by the service. `v1` for all OSRM 5.x installations |
| `profile` | Mode of transportation, is determined statically by the Lua profile that is used to prepare the data using `osrm-extract`. Typically `car`, `bike` or `foot` if using one of the supplied profiles. |
| `coordinates`| String of format `{longitude},{latitude};{longitude},{latitude}[;{longitude},{latitude} ...]` or `polyline({polyline}) or polyline6({polyline6})`. |
| `format`| `json` or `flatbuffers`. This parameter is optional and defaults to `json`. |

Passing any `option=value` is optional. `polyline` follows Google's polyline format with precision 5 by default and can be generated using [this package](https://www.npmjs.com/package/polyline).

To pass parameters to each location some options support an array-like encoding:

**Request options**

| Option         | Values                                                 | Description                                                                                                                                                                                               |
|----------------|--------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|bearings        |`{bearing};{bearing}[;{bearing} ...]`                   |Limits the search to segments with given bearing in degrees towards true north in a clockwise direction.                                                                                                     |
|radiuses        |`{radius};{radius}[;{radius} ...]`                      |Limits the search to given radius in meters.                                                                                                                                                               |
|generate\_hints |`true` (default), `false`                               |Adds a Hint to the response which can be used in subsequent requests, see `hints` parameter.                                                                                                               |
|hints           |`{hint};{hint}[;{hint} ...]`                            |Hint from previous request to derive position in street network.                                                                                                                                           |
|approaches      |`{approach};{approach}[;{approach} ...]`                |Keep waypoints on curbside.                                                                                                                                                                               |
|exclude         |`{class}[,{class}]`                                     |Additive list of classes to avoid, the order does not matter.                                                                                                                                                  |
|snapping        |`default` (default), `any`                              |Default snapping avoids is_startpoint (see profile) edges, `any` will snap to any edge in the graph                                                                                                        |
|skip_waypoints  |`true`, `false` (default)                               |Removes waypoints from the response. Waypoints are still calculated, but not serialized. Could be useful in case you are interested in some other part of the response and do not want to transfer waste data. |

Where the elements follow the following format:

| Element    | Values                                                 |
|------------|--------------------------------------------------------|
|bearing     |`{value},{range}` `integer 0 .. 360,integer 0 .. 180`   |
|radius      |`double >= 0` or `unlimited` (default)                  |
|hint        |Base64 `string`                                         |
|approach    |`curb` or `unrestricted` (default)                      |
|class       |A class name determined by the profile or `none`.       |

```
{option}={element};{element}[;{element} ... ]
```

The number of elements must match exactly the number of locations (except for `generate_hints` and `exclude`). If you don't want to pass a value but instead use the default you can pass an empty `element`.

Example: 2nd location uses the default value for `option`:

```
{option}={element};;{element}
```

#### Example Requests

```curl
# Query on Berlin with three coordinates:
curl 'http://router.project-osrm.org/route/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?overview=false'

# Query on Berlin excluding the usage of motorways:
curl 'http://router.project-osrm.org/route/v1/driving/13.388860,52.517037;13.397634,52.529407?exclude=motorway'

# Using polyline:
curl 'http://router.project-osrm.org/route/v1/driving/polyline(ofp_Ik_vpAilAyu@te@g`E)?overview=false'
```

### Responses

#### Code

Every response object has a `code` property containing one of the strings below or a service dependent code:

| Type              | Description                                                                      |
|-------------------|----------------------------------------------------------------------------------|
| `Ok`              | Request could be processed as expected.                                          |
| `InvalidUrl`      | URL string is invalid.                                                           |
| `InvalidService`  | Service name is invalid.                                                         |
| `InvalidVersion`  | Version is not found.                                                            |
| `InvalidOptions`  | Options are invalid.                                                             |
| `InvalidQuery`    | The query string is syntactically malformed.                                    |
| `InvalidValue`    | The successfully parsed query parameters are invalid.                            |
| `NoSegment`       | One of the supplied input coordinates could not snap to the street segment.          |
| `TooBig`          | The request size violates one of the service-specific request size restrictions. |

- `message` is a **optional** human-readable error message. All other status types are service-dependent.
- In case of an error the HTTP status code will be `400`. Otherwise, the HTTP status code will be `200` and `code` will be `Ok`.

#### Data version

Every response object has a `data_version` property containing a timestamp from the original OpenStreetMap file. This field is optional. It can be omitted if the data_version parameter was not set on the osrm-extract stage or the OSM file has not `osmosis_replication_timestamp` section.

#### Example response

```json
{
"code": "Ok",
"message": "Everything worked",
"data_version": "2017-11-17T21:43:02Z"
}
```

## Services

### Nearest service

Snaps a coordinate to the street network and returns the nearest `n` matches.

```endpoint
GET http://{server}/nearest/v1/{profile}/{coordinates}.json?number={number}
```

Where `coordinates` only supports a single `{longitude},{latitude}` entry.

In addition to the [general options](#general-options) the following options are supported for this service:

|Option      |Values                        |Description                                         |
|------------|------------------------------|----------------------------------------------------|
|number      |`integer >= 1` (default `1`)  |Number of nearest segments that should be returned. |

As `waypoints` is a single thing, returned by that service, using it with the option `skip_waypoints` set to `true` is quite useless, but still
possible. In that case, only the `code` field will be returned.

**Response**

- `code` if the request was successful `Ok` otherwise see the service dependent and general status codes.
- `waypoints` array of `Waypoint` objects sorted by distance to the input coordinate. Each object has at least the following additional properties:
  - `nodes`: Array of OpenStreetMap node ids.

#### Example Requests

```curl
# Querying nearest three snapped locations of `13.388860,52.517037` with a bearing between `20° - 340°`.
curl 'http://router.project-osrm.org/nearest/v1/driving/13.388860,52.517037?number=3&bearings=0,20'
```

#### Example Response

```JSON
{
   "waypoints" : [
      {
         "nodes": [
            2264199819,
            0
         ],
         "hint" : "KSoKADRYroqUBAEAEAAAABkAAAAGAAAAAAAAABhnCQCLtwAA_0vMAKlYIQM8TMwArVghAwEAAQH1a66g",
         "distance" : 4.152629,
         "name" : "Friedrichstraße",
         "location" : [
            13.388799,
            52.517033
         ]
      },
      {
         "nodes": [
            2045820592,
            0
         ],
         "hint" : "KSoKADRYroqUBAEABgAAAAAAAAAAAAAAKQAAABhnCQCLtwAA7kvMAAxZIQM8TMwArVghAwAAAQH1a66g",
         "distance" : 11.811961,
         "name" : "Friedrichstraße",
         "location" : [
            13.388782,
            52.517132
         ]
      },
      {
         "nodes": [
            0,
            21487242
         ],
         "hint" : "KioKgDbbDgCUBAEAAAAAABoAAAAAAAAAPAAAABlnCQCLtwAA50vMADJZIQM8TMwArVghAwAAAQH1a66g",
         "distance" : 15.872438,
         "name" : "Friedrichstraße",
         "location" : [
            13.388775,
            52.51717
         ],
      }
   ],
   "code" : "Ok"
}
```

### Route service

Finds the fastest route between coordinates in the supplied order.

```endpoint
GET /route/v1/{profile}/{coordinates}?alternatives={true|false|number}&steps={true|false}&geometries={polyline|polyline6|geojson}&overview={full|simplified|false}&annotations={true|false}
```

In addition to the [general options](#general-options) the following options are supported for this service:

|Option      |Values                                       |Description                                                                    |
|------------|---------------------------------------------|-------------------------------------------------------------------------------|
|alternatives|`true`, `false` (default), or Number         |Search for alternative routes. Passing a number `alternatives=n` searches for up to `n` alternative routes.\*                            |
|steps       |`true`, `false` (default)                    |Returned route steps for each route leg                                        |
|annotations |`true`, `false` (default), `nodes`, `distance`, `duration`, `datasources`, `weight`, `speed`  |Returns additional metadata for each coordinate along the route geometry.      |
|geometries  |`polyline` (default), `polyline6`, `geojson` |Returned route geometry format (influences overview and per step)              |
|overview    |`simplified` (default), `full`, `false`      |Add overview geometry either full, simplified according to highest zoom level it could be display on, or not at all.|
|continue\_straight |`default` (default), `true`, `false`  |Forces the route to keep going straight at waypoints constraining uturns there even if it would be faster. Default value depends on the profile. |
|waypoints   | `{index};{index};{index}...`                |Treats input coordinates indicated by given indices as waypoints in returned Match object. Default is to treat all input coordinates as waypoints.    |

\* Please note that even if alternative routes are requested, a result cannot be guaranteed.

**Response**

- `code` if the request was successful `Ok` otherwise see the service dependent and general status codes.
- `waypoints`: Array of `Waypoint` objects representing all waypoints in order:
- `routes`: An array of `Route` objects, ordered by descending recommendation rank.

In case of error the following `code`s are supported in addition to the general ones:

| Type              | Description     |
|-------------------|-----------------|
| `NoRoute`         | No route found. |

All other properties might be undefined.

#### Example Request

```curl
# Query on Berlin with three coordinates and no overview geometry returned:
curl 'http://router.project-osrm.org/route/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?overview=false'
```

### Table service

Computes the duration of the fastest route between all pairs of supplied coordinates. Returns durations or distances or both between the coordinate pairs. Note that the distances are not the shortest distance between two coordinates, but rather the distances of the fastest routes. Durations are in seconds and distances are in meters.

```endpoint
GET /table/v1/{profile}/{coordinates}?{sources}=[{elem}...];&{destinations}=[{elem}...]&annotations={duration|distance|duration,distance}
```

**Options**

In addition to the [general options](#general-options) the following options are supported for this service:

|Option      |Values                                            |Description                                  |
|------------|--------------------------------------------------|---------------------------------------------|
|sources     |`{index};{index}[;{index} ...]` or `all` (default)|Use location with given index as source.     |
|destinations|`{index};{index}[;{index} ...]` or `all` (default)|Use location with given index as destination.|
|annotations |`duration` (default), `distance`, or `duration,distance`|Return the requested table or tables in response. |
|fallback_speed|`double > 0`| If no route found between a source/destination pair, calculate the as-the-crow-flies distance, then use this speed to estimate duration.|
|fallback_coordinate|`input` (default), or `snapped`| When using a `fallback_speed`, use the user-supplied coordinate (`input`), or the snapped location (`snapped`) for calculating distances.|
|scale_factor|`double > 0`| Use in conjunction with `annotations=durations`. Scales the table `duration` values by this number.|

Unlike other array encoded options, the length of `sources` and `destinations` can be **smaller or equal**
to number of input locations;

With `skip_waypoints` set to `true`, both `sources` and `destinations` arrays will be skipped.

**Example:**

```
sources=0;5;7&destinations=5;1;4;2;3;6
```

|Element     |Values                       |
|------------|-----------------------------|
|index       |`0 <= integer < #locations`  |

#### Example Request

```curl
# Returns a 3x3 duration matrix:
curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219'

# Returns a 1x3 duration matrix
curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?sources=0'

# Returns a asymmetric 3x2 duration matrix with from the polyline encoded locations `qikdcB}~dpXkkHz`:
curl 'http://router.project-osrm.org/table/v1/driving/polyline(egs_Iq_aqAppHzbHulFzeMe`EuvKpnCglA)?sources=0;1;3&destinations=2;4'

# Returns a 3x3 duration matrix:
curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?annotations=duration'

# Returns a 3x3 distance matrix for CH:
curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?annotations=distance'

# Returns a 3x3 duration matrix and a 3x3 distance matrix for CH:
curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219?annotations=distance,duration'
```

**Response**

- `code` if the request was successful `Ok` otherwise see the service dependent and general status codes.
- `durations` array of arrays that stores the matrix in row-major order. `durations[i][j]` gives the travel time from
  the i-th source to the j-th destination. Values are given in seconds. Can be `null` if no route between `i` and `j` can be found.
- `distances` array of arrays that stores the matrix in row-major order. `distances[i][j]` gives the travel distance from
  the i-th source to the j-th destination. Values are given in meters. Can be `null` if no route between `i` and `j` can be found.
- `sources` array of `Waypoint` objects describing all sources in order
- `destinations` array of `Waypoint` objects describing all destinations in order
- `fallback_speed_cells` (optional) array of arrays containing `i,j` pairs indicating which cells contain estimated values based on `fallback_speed`.  Will be absent if `fallback_speed` is not used.

In case of error the following `code`s are supported in addition to the general ones:

| Type             | Description     |
|------------------|-----------------|
| `NoTable`        | No route found. |
| `NotImplemented`  | This request is not supported |

All other properties might be undefined.

#### Example Response

```json
{
  "sources": [
    {
      "location": [
        13.3888,
        52.517033
      ],
      "hint": "PAMAgEVJAoAUAAAAIAAAAAcAAAAAAAAArss0Qa7LNEHiVIRA4lSEQAoAAAAQAAAABAAAAAAAAADMAAAAAEzMAKlYIQM8TMwArVghAwEA3wps52D3",
      "name": "Friedrichstraße"
    },
    {
      "location": [
        13.397631,
        52.529432
      ],
      "hint": "WIQBgL6mAoAEAAAABgAAAAAAAAA7AAAAhU6PQHvHj0IAAAAAQbyYQgQAAAAGAAAAAAAAADsAAADMAAAAf27MABiJIQOCbswA_4ghAwAAXwVs52D3",
      "name": "Torstraße"
    },
    {
      "location": [
        13.428554,
        52.523239
      ],
      "hint": "7UcAgP___38fAAAAUQAAACYAAABTAAAAhSQKQrXq5kKRbiZCWJo_Qx8AAABRAAAAJgAAAFMAAADMAAAASufMAOdwIQNL58wA03AhAwMAvxBs52D3",
      "name": "Platz der Vereinten Nationen"
    }
  ],
  "durations": [
    [
      0,
      192.6,
      382.8
    ],
    [
      199,
      0,
      283.9
    ],
    [
      344.7,
      222.3,
      0
    ]
  ],
  "destinations": [
    {
      "location": [
        13.3888,
        52.517033
      ],
      "hint": "PAMAgEVJAoAUAAAAIAAAAAcAAAAAAAAArss0Qa7LNEHiVIRA4lSEQAoAAAAQAAAABAAAAAAAAADMAAAAAEzMAKlYIQM8TMwArVghAwEA3wps52D3",
      "name": "Friedrichstraße"
    },
    {
      "location": [
        13.397631,
        52.529432
      ],
      "hint": "WIQBgL6mAoAEAAAABgAAAAAAAAA7AAAAhU6PQHvHj0IAAAAAQbyYQgQAAAAGAAAAAAAAADsAAADMAAAAf27MABiJIQOCbswA_4ghAwAAXwVs52D3",
      "name": "Torstraße"
    },
    {
      "location": [
        13.428554,
        52.523239
      ],
      "hint": "7UcAgP___38fAAAAUQAAACYAAABTAAAAhSQKQrXq5kKRbiZCWJo_Qx8AAABRAAAAJgAAAFMAAADMAAAASufMAOdwIQNL58wA03AhAwMAvxBs52D3",
      "name": "Platz der Vereinten Nationen"
    }
  ],
  "code": "Ok",
  "distances": [
    [
      0,
      1886.89,
      3791.3
    ],
    [
      1824,
      0,
      2838.09
    ],
    [
      3275.36,
      2361.73,
      0
    ]
  ],
  "fallback_speed_cells": [
    [ 0, 1 ],
    [ 1, 0 ]
  ]
}
```

### Match service

Map matching matches/snaps given GPS points to the road network in the most plausible way.
Please note the request might result in multiple sub-traces. Large jumps in the timestamps (> 60s) or improbable transitions lead to trace splits if a complete matching could not be found.
The algorithm might not be able to match all points. Outliers are removed if they can not be matched successfully.

```endpoint
GET /match/v1/{profile}/{coordinates}?steps={true|false}&geometries={polyline|polyline6|geojson}&overview={simplified|full|false}&annotations={true|false}
```

In addition to the [general options](#general-options) the following options are supported for this service:

|Option      |Values                                          |Description                                                                               |
|------------|------------------------------------------------|------------------------------------------------------------------------------------------|
|steps       |`true`, `false` (default)                       |Returned route steps for each route                                                       |
|geometries  |`polyline` (default), `polyline6`, `geojson`    |Returned route geometry format (influences overview and per step)                         |
|annotations |`true`, `false` (default), `nodes`, `distance`, `duration`, `datasources`, `weight`, `speed`  |Returns additional metadata for each coordinate along the route geometry.                 |
|overview    |`simplified` (default), `full`, `false`         |Add overview geometry either full, simplified according to highest zoom level it could be display on, or not at all.|
|timestamps  |`{timestamp};{timestamp}[;{timestamp} ...]`     |Timestamps for the input locations in seconds since UNIX epoch. Timestamps need to be monotonically increasing. |
|radiuses    |`{radius};{radius}[;{radius} ...]`              |Standard deviation of GPS precision used for map matching. If applicable use GPS accuracy.|
|gaps        |`split` (default), `ignore`                     |Allows the input track splitting based on huge timestamp gaps between points.             |
|tidy        |`true`, `false` (default)                       |Allows the input track modification to obtain better matching quality for noisy tracks.   |
|waypoints   | `{index};{index};{index}...`                   |Treats input coordinates indicated by given indices as waypoints in returned Match object. Default is to treat all input coordinates as waypoints.    |

|Parameter   |Values                             |
|------------|-----------------------------------|
|timestamp   |`integer` seconds since UNIX epoch |
|radius      |`double >= 0` (default 5m)         |

The radius for each point should be the standard error of the location measured in meters from the true location.
Use `Location.getAccuracy()` on Android or `CLLocation.horizontalAccuracy` on iOS.
This value is used to determine which points should be considered as candidates (larger radius means more candidates) and how likely each candidate is (larger radius means far-away candidates are penalized less).
The area to search is chosen such that the correct candidate should be considered 99.9% of the time (for more details see [this ticket](https://github.com/Project-OSRM/osrm-backend/pull/3184)).

**Response**

- `code` if the request was successful `Ok` otherwise see the service dependent and general status codes.
- `tracepoints`: Array of `Waypoint` objects representing all points of the trace in order.
  If the tracepoint was omitted by map matching because it is an outlier, the entry will be `null`.
  Each `Waypoint` object has the following additional properties:
  - `matchings_index`: Index to the `Route` object in `matchings` the sub-trace was matched to.
  - `waypoint_index`: Index of the waypoint inside the matched route.
  - `alternatives_count`: Number of probable alternative matchings for this tracepoint. A value of zero indicates that this point was matched unambiguously. Split the trace at these points for incremental map matching.
- `matchings`: An array of `Route` objects that assemble the trace. Each `Route` object has the following additional properties:
  - `confidence`: Confidence of the matching. `float` value between 0 and 1. 1 is very confident that the matching is correct.

In case of error the following `code`s are supported in addition to the general ones:

| Type              | Description         |
|-------------------|---------------------|
| `NoMatch`         | No matchings found. |

All other properties might be undefined.

### Trip service

The trip plugin solves the Traveling Salesman Problem using a greedy heuristic (farthest-insertion algorithm) for 10 or more waypoints and uses brute force for less than 10 waypoints.
The returned path does not have to be the fastest one. As TSP is NP-hard it only returns an approximation.
Note that all input coordinates have to be connected for the trip service to work.

```endpoint
GET /trip/v1/{profile}/{coordinates}?roundtrip={true|false}&source{any|first}&destination{any|last}&steps={true|false}&geometries={polyline|polyline6|geojson}&overview={simplified|full|false}&annotations={true|false}'
```

In addition to the [general options](#general-options) the following options are supported for this service:

|Option      |Values                                          |Description                                                                |
|------------|------------------------------------------------|---------------------------------------------------------------------------|
|roundtrip   |`true` (default), `false`                       |Returned route is a roundtrip (route returns to first location)            |
|source      |`any` (default), `first`                        |Returned route starts at `any` or `first` coordinate                       |
|destination |`any` (default), `last`                         |Returned route ends at `any` or `last` coordinate                          |
|steps       |`true`, `false` (default)                       |Returned route instructions for each trip                                  |
|annotations |`true`, `false` (default), `nodes`, `distance`, `duration`, `datasources`, `weight`, `speed` |Returns additional metadata for each coordinate along the route geometry.  |
|geometries  |`polyline` (default), `polyline6`, `geojson`    |Returned route geometry format (influences overview and per step)          |
|overview    |`simplified` (default), `full`, `false`         |Add overview geometry either full, simplified according to highest zoom level it could be display on, or not at all.|

**Fixing Start and End Points**

It is possible to explicitly set the start or end coordinate of the trip.
When the source is set to `first`, the first coordinate is used as the start coordinate of the trip in the output. When the destination is set to `last`, the last coordinate will be used as the destination of the trip in the returned output. If you specify `any`, any of the coordinates can be used as the first or last coordinate in the output.

However, if `source=any&destination=any` the returned round-trip will still start at the first input coordinate by default.

Currently, not all combinations of `roundtrip`, `source`, and `destination` are supported.
Right now, the following combinations are possible:

| roundtrip | source | destination | supported |
| :-- | :-- | :-- | :-- |
| true | first | last | **yes** |
| true | first | any | **yes** |
| true | any | last | **yes** |
| true | any | any | **yes** |
| false | first | last | **yes** |
| false | first | any | **yes** |
| false | any | last | **yes** |
| false | any | any | no |

#### Example Requests

```curl
# Round trip in Berlin with three stops:
curl 'http://router.project-osrm.org/trip/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219'
```

```curl
# Round trip in Berlin with four stops, starting at the first stop, ending at the last:
curl 'http://router.project-osrm.org/trip/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219;13.418555,52.523215?source=first&destination=last'
```

#### Response

- `code`: if the request was successful `Ok` otherwise see the service dependent and general status codes.
- `waypoints`: Array of `Waypoint` objects representing all waypoints in input order. Each `Waypoint` object has the following additional properties:
  - `trips_index`: Index to `trips` of the sub-trip the point was matched to.
  - `waypoint_index`: Index of the point in the trip.
- `trips`: An array of `Route` objects that assemble the trace.

In case of error the following `code`s are supported in addition to the general ones:

| Type              | Description         |
|-------------------|---------------------|
| `NoTrips`         | No trips found because input coordinates are not connected.|
| `NotImplemented`  | This request is not supported |

All other properties might be undefined.

### Tile service

This service generates [Mapbox Vector Tiles](https://www.mapbox.com/developers/vector-tiles/) that can be viewed with a vector-tile capable slippy-map viewer.  The tiles contain road geometries and metadata that can be used to examine the routing graph.  The tiles are generated directly from the data in-memory, so are in sync with actual routing results, and let you examine which roads are actually routable, and what weights they have applied.

```endpoint
GET /tile/v1/{profile}/tile({x},{y},{zoom}).mvt
```

The `x`, `y`, and `zoom` values are the same as described at https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames, and are supported by vector tile viewers like [Mapbox GL JS](https://www.mapbox.com/mapbox-gl-js/api/).

#### Example request

```curl
# This fetches a Z=13 tile for downtown San Francisco:
curl 'http://router.project-osrm.org/tile/v1/car/tile(1310,3166,13).mvt'
```

#### Example response

> ![example rendered tile](images/example-tile-response.png)
> http://map.project-osrm.org/debug/#14.33/52.5212/13.3919

The response object is either a binary encoded blob with a `Content-Type` of `application/x-protobuf`, or a `404` error.  Note that OSRM is hard-coded to only return tiles from zoom level 12 and higher (to avoid accidentally returning extremely large vector tiles).

Vector tiles contain two layers:

`speeds` layer:

| Property     | Type      | Description                              |
| ------------ | --------- | ---------------------------------------- |
| `speed`      | `integer` | the speed on that road segment, in km/h  |
| `is_small`   | `boolean` | whether this segment belongs to a small (< 1000 node) [strongly connected component](https://en.wikipedia.org/wiki/Strongly_connected_component) |
| `datasource` | `string`  | the source for the speed value (normally `lua profile` unless you're using the [traffic update feature](https://github.com/Project-OSRM/osrm-backend/wiki/Traffic), in which case it contains the stem of the filename that supplied the speed value for this segment |
| `duration`   | `float`   | how long this segment takes to traverse, in seconds.  This value is to calculate the total route ETA. |
| `weight  `   | `integer` | how long this segment takes to traverse, in units (may differ from `duration` when artificial biasing is applied in the Lua profiles).  ACTUAL ROUTING USES THIS VALUE. |
| `name`       | `string`  | the name of the road this segment belongs to |
| `rate`       | `float`   | the value of `length/weight` - analogous to `speed`, but using the `weight` value rather than `duration`, rounded to the nearest integer |
| `is_startpoint` | `boolean` | whether this segment can be used as a start/endpoint for routes |

`turns` layer:

| Property     | Type      | Description                              |
| ------------ | --------- | ---------------------------------------- |
| `bearing_in` | `integer` | the absolute bearing that approaches the intersection.  -180 to +180, 0 = North, 90 = East |
| `turn_angle` | `integer` | the angle of the turn, relative to the `bearing_in`.  -180 to +180, 0 = straight ahead, 90 = 90-degrees to the right |
| `cost`       | `float`   | the time we think it takes to make that turn, in seconds.  May be negative, depending on how the data model is constructed (some turns get a "bonus"). |
| `weight`     | `float`   | the weight we think it takes to make that turn.  May be negative, depending on how the data model is constructed (some turns get a "bonus"). ACTUAL ROUTING USES THIS VALUE |
| `type`       | `string`  | the type of this turn - values like `turn`, `continue`, etc.  See the `StepManeuver` for a partial list, this field also exposes internal turn types that are never returned with an API response |
| `modifier`   | `string`  | the direction modifier of the turn (`left`, `sharp left`, etc) |

## Result objects

### Route object

Represents a route through (potentially multiple) waypoints.

**Properties**

- `distance`: The distance traveled by the route, in `float` meters.
- `duration`: The estimated travel time, in `float` number of seconds.
- `geometry`: The whole geometry of the route value depending on `overview` parameter, format depending on the `geometries` parameter. See `RouteStep`'s `geometry` property for the parameter documentation.
- `weight`: The calculated weight of the route.
- `weight_name`: The name of the weight profile used during the extraction phase.

| overview   | Description                 |
|------------|-----------------------------|
| simplified | Geometry is simplified according to the highest zoom level it can still be displayed in full. |
| full       | Geometry is not simplified. |
| false      | Geometry is not added.      |

- `legs`: The legs between the given waypoints, an array of `RouteLeg` objects.

#### Example

Three input coordinates, `geometry=geojson`, `steps=false`:

```json
{
  "distance": 90.0,
  "duration": 300.0,
  "weight": 300.0,
  "weight_name": "duration",
  "geometry": {"type": "LineString", "coordinates": [[120.0, 10.0], [120.1, 10.0], [120.2, 10.0], [120.3, 10.0]]},
  "legs": [
    {
      "distance": 30.0,
      "duration": 100.0,
      "steps": []
    },
    {
      "distance": 60.0,
      "duration": 200.0,
      "steps": []
    }
  ]
}
```

### RouteLeg object

Represents a route between two waypoints.

**Properties**

- `distance`: The distance traveled by this route leg, in `float` meters.
- `duration`: The estimated travel time, in `float` number of seconds.
- `weight`: The calculated weight of the route leg.
- `summary`: Summary of the route taken as `string`. Depends on the `summary` parameter:

| summary      |                                                                       |
|--------------|-----------------------------------------------------------------------|
| true         | Names of the two major roads used. Can be empty if the route is too short.|
| false        | empty `string`                                                        |

- `steps`: Depends on the `steps` parameter.

| steps        |                                                                       |
|--------------|-----------------------------------------------------------------------|
| true         | array of `RouteStep` objects describing the turn-by-turn instructions |
| false        | empty array                                                           |

- `annotation`: Additional details about each coordinate along with the route geometry:

| annotations  |                                                                               |
|--------------|-------------------------------------------------------------------------------|
| true         | An `Annotation` object containing node ids, durations, distances, and weights. |
| false        | `undefined`                                                                   |

#### Example

With `steps=false` and `annotations=true`:

```json
{
  "distance": 30.0,
  "duration": 100.0,
  "weight": 100.0,
  "steps": [],
  "annotation": {
    "distance": [5,5,10,5,5],
    "duration": [15,15,40,15,15],
    "datasources": [1,0,0,0,1],
    "metadata": { "datasource_names": ["traffic","lua profile","lua profile","lua profile","traffic"] },
    "nodes": [49772551,49772552,49786799,49786800,49786801,49786802],
    "speed": [0.3, 0.3, 0.3, 0.3, 0.3]
  }
}
```

### Annotation object

Annotation of the whole route leg with fine-grained information about each segment or node id.

**Properties**

- `distance`: The distance, in meters, between each pair of coordinates
- `duration`: The duration between each pair of coordinates, in seconds.  Does not include the duration of any turns.
- `datasources`: The index of the data source for the speed between each pair of coordinates. `0` is the default profile, other values are supplied via `--segment-speed-file` to `osrm-contract` or `osrm-customize`.  String-like names are in the `metadata.datasource_names` array.
- `nodes`: The OSM node ID for each coordinate along the route, excluding the first/last user-supplied coordinates
- `weight`: The weights between each pair of coordinates.  Does not include any turn costs.
- `speed`: Convenience field, calculation of `distance / duration` rounded to one decimal place
- `metadata`: Metadata related to other annotations
  - `datasource_names`: The names of the data sources used for the speed between each pair of coordinates.  `lua profile` is the default profile, other values are the filenames supplied via `--segment-speed-file` to `osrm-contract` or `osrm-customize`

#### Example

```json
{
  "distance": [5,5,10,5,5],
  "duration": [15,15,40,15,15],
  "datasources": [1,0,0,0,1],
  "metadata": { "datasource_names": ["traffic","lua profile","lua profile","lua profile","traffic"] },
  "nodes": [49772551,49772552,49786799,49786800,49786801,49786802],
  "weight": [15,15,40,15,15]
}
```

### RouteStep object

A step consists of a maneuver such as a turn or merge, followed
by a distance of travel along a single way to the subsequent
step.

**Properties**

- `distance`: The distance of travel from the maneuver to the subsequent step, in `float` meters.
- `duration`: The estimated travel time, in `float` number of seconds.
- `geometry`: The unsimplified geometry of the route segment, depending on the `geometries` parameter.
- `weight`: The calculated weight of the step.

| `geometry` |                                                                    |
|------------|--------------------------------------------------------------------|
| polyline   | [polyline](https://www.npmjs.com/package/polyline) with precision 5 in [latitude,longitude] encoding |
| polyline6  | [polyline](https://www.npmjs.com/package/polyline) with precision 6 in [latitude,longitude] encoding |
| geojson    | [GeoJSON `LineString`](http://geojson.org/geojson-spec.html#linestring) |

- `name`: The name of the way along which travel proceeds.
- `ref`: A reference number or code for the way. Optionally included, if ref data is available for the given way.
- `pronunciation`: A string containing an [IPA](https://en.wikipedia.org/wiki/International_Phonetic_Alphabet) phonetic transcription indicating how to pronounce the name in the `name` property. This property is omitted if pronunciation data is unavailable for the step.
- `destinations`: The destinations of the way. Will be `undefined` if there are no destinations.
- `exits`: The exit numbers or names of the way. Will be `undefined` if there are no exit numbers or names.
- `mode`: A string signifying the mode of transportation.
- `maneuver`: A `StepManeuver` object representing the maneuver.
- `intersections`: A list of `Intersection` objects that are passed along the segment, the very first belonging to the StepManeuver
- `rotary_name`: The name for the rotary. Optionally included, if the step is a rotary and a rotary name is available.
- `rotary_pronunciation`: The pronunciation hint of the rotary name. Optionally included, if the step is a rotary and a rotary pronunciation is available.
- `driving_side`: The legal driving side at the location for this step.  Either `left` or `right`.

#### Example

```json
{
   "geometry" : "{lu_IypwpAVrAvAdI",
   "mode" : "driving",
   "duration" : 15.6,
   "weight" : 15.6,
   "intersections" : [
      {  "bearings" : [ 10, 92, 184, 270 ],
         "lanes" : [
            { "indications" : [ "left", "straight" ],
               "valid" : false },
            { "valid" : true,
               "indications" : [ "right" ] }
         ],
         "out" : 2,
         "in" : 3,
         "entry" : [ "true", "true", "true", "false" ],
         "location" : [ 13.39677, 52.54366 ]
      },
      {  "out" : 1,
         "lanes" : [
            { "indications" : [ "straight" ],
               "valid" : true },
            { "indications" : [ "right" ],
               "valid" : false }
         ],
         "bearings" : [ 60, 240, 330 ],
         "in" : 0,
         "entry" : [ "false", "true", "true" ],
         "location" : [ 13.394718, 52.543096 ]
      }
   ],
   "name" : "Lortzingstraße",
   "distance" : 152.3,
   "maneuver" : {
      "modifier" : "right",
      "type" : "turn"
   }
}
```

### StepManeuver object

**Properties**

- `location`: A `[longitude, latitude]` pair describing the location of the turn.
- `bearing_before`: The clockwise angle from true north to the
  direction of travel immediately before the maneuver.  Range 0-359.
- `bearing_after`: The clockwise angle from true north to the
  direction of travel immediately after the maneuver.  Range 0-359.
- `type` A string indicating the type of maneuver. **new identifiers might be introduced without API change**
   Types unknown to the client should be handled like the `turn` type, the existence of correct `modifier` values is guaranteed.

| `type`           | Description                                                  |
|------------------|--------------------------------------------------------------|
| `turn`           | a basic turn into the direction of the `modifier`                |
| `new name`       | no turn is taken/possible, but the road name changes. The road can take a turn itself, following `modifier`.                  |
| `depart`         | indicates the departure of the leg                           |
| `arrive`         | indicates the destination of the leg                         |
| `merge`          | merge onto a street (e.g. getting on the highway from a ramp, the `modifier specifies the direction of the merge`) |
| `ramp`           | **Deprecated**. Replaced by `on_ramp` and `off_ramp`.        |
| `on ramp`        | take a ramp to enter a highway (direction given my `modifier`) |
| `off ramp`       | take a ramp to exit a highway (direction given my `modifier`)  |
| `fork`           | take the left/right side at a fork depending on `modifier`   |
| `end of road`    | road ends in a T intersection turn in direction of `modifier`|
| `use lane`       | **Deprecated** replaced by lanes on all intersection entries |
| `continue`       | Turn in direction of `modifier` to stay on the same road     |
| `roundabout`     | traverse roundabout, if the route leaves the roundabout there will be an additional property `exit` for exit counting. The modifier specifies the direction of entering the roundabout. |
| `rotary`         | a traffic circle. While very similar to a larger version of a roundabout, it does not necessarily follow roundabout rules for right of way. It can offer `rotary_name` and/or `rotary_pronunciation` parameters (located in the RouteStep object) in addition to the `exit` parameter (located on the StepManeuver object).  |
| `roundabout turn`| Describes a turn at a small roundabout that should be treated as a normal turn. The `modifier` indicates the turn direction. Example instruction: `At the roundabout turn left`. |
| `notification`   | not an actual turn but a change in the driving conditions. For example the travel mode or classes. If the road takes a turn itself, the `modifier` describes the direction |
| `exit roundabout`| Describes a maneuver exiting a roundabout (usually preceded by a `roundabout` instruction) |
| `exit rotary`    | Describes the maneuver exiting a rotary (large named roundabout) |

Please note that even though there are `new name` and `notification` instructions, the `mode` and `name` can change
  between all instructions. They only offer a fallback in case nothing else is to report.

- `modifier` An optional `string` indicating the direction change of the maneuver.

| `modifier`        | Description                               |
|-------------------|-------------------------------------------|
| `uturn`           | indicates the reversal of direction          |
| `sharp right`     | a sharp right turn                        |
| `right`           | a normal turn to the right                |
| `slight right`    | a slight turn to the right                |
| `straight`        | no relevant change in direction           |
| `slight left`     | a slight turn to the left                 |
| `left`            | a normal turn to the left                 |
| `sharp left`      | a sharp turn to the left                  |

The list of turns without a modifier is limited to: `depart/arrive`. If the source/target location is close enough to the `depart/arrive` location, no modifier will be given.

The meaning depends on the `type` property.

| `type`                 | Description                                                                                                               |
|------------------------|---------------------------------------------------------------------------------------------------------------------------|
| `turn`                 | `modifier` indicates the change in direction accomplished through the turn                                                |
| `depart`/`arrive`      | `modifier` indicates the position of departure point and arrival point in relation to the current direction of travel      |

- `exit` An optional `integer` indicating the number of the exit to take. The property exists for the `roundabout` / `rotary` property:
  Number of the roundabout exit to take. If an exit is `undefined` the destination is on the roundabout.

New properties (potentially depending on `type`) may be introduced in the future without an API version change.

### Lane object

A `Lane` represents a turn lane at the corresponding turn location.

**Properties**

- `indications`: an indication (e.g. marking on the road) specifying the turn lane. A road can have multiple indications (e.g. an arrow pointing straight and left). The indications are given in an array, each containing one of the following types. Further indications might be added on without an API version change.

| `value`                | Description                                                                                                               |
|------------------------|---------------------------------------------------------------------------------------------------------------------------|
| `none`                 | No dedicated indication is shown.                                                                                         |
| `uturn`                | An indication signaling the possibility to reverse (i.e. fully bend arrow).                                               |
| `sharp right`          | An indication indicating a sharp right turn (i.e. strongly bend arrow).                                                   |
| `right`                | An indication indicating a right turn (i.e. bend arrow).                                                                  |
| `slight right`         | An indication indicating a slight right turn (i.e. slightly bend arrow).                                                  |
| `straight`             | No dedicated indication is shown (i.e. straight arrow).                                                                   |
| `slight left`          | An indication indicating a slight left turn (i.e. slightly bend arrow).                                                   |
| `left`                 | An indication indicating a left turn (i.e. bend arrow).                                                                   |
| `sharp left`           | An indication indicating a sharp left turn (i.e. strongly bend arrow).                                                    |

- `valid`: a boolean flag indicating whether the lane is a valid choice in the current maneuver

#### Example

```json
{
    "indications": ["left", "straight"],
    "valid": false
}
 ```

### Intersection object

An intersection gives a full representation of any cross-way the path passes by. For every step, the very first intersection (`intersections[0]`) corresponds to the
location of the StepManeuver. Further intersections are listed for every cross-way until the next turn instruction.

**Properties**

- `location`: A `[longitude, latitude]` pair describing the location of the turn.
- `bearings`: A list of bearing values (e.g. [0,90,180,270]) that are available at the intersection. The bearings describe all available roads at the intersection.  Values are between 0-359 (0=true north)
- `classes`: An array of strings signifying the classes (as specified in the profile) of the road exiting the intersection.
- `entry`: A list of entry flags, corresponding in a 1:1 relationship to the bearings. A value of `true` indicates that the respective road could be entered on a valid route.
  `false` indicates that the turn onto the respective road would violate a restriction.
- `in`: index into bearings/entry array. Used to calculate the bearing just before the turn. Namely, the clockwise angle from true north to the
  direction of travel immediately before the maneuver/passing the intersection. Bearings are given relative to the intersection. To get the bearing
  in the direction of driving, the bearing has to be rotated by a value of 180. The value is not supplied for `depart` maneuvers.
- `out`: index into the bearings/entry array. Used to extract the bearing just after the turn. Namely, The clockwise angle from true north to the
  direction of travel immediately after the maneuver/passing the intersection. The value is not supplied for `arrive` maneuvers.
- `lanes`: Array of `Lane` objects that denote the available turn lanes at the intersection. If no lane information is available for an intersection, the `lanes` property will not be present.

#### Example

```json
{
    "location":[13.394718,52.543096],
    "in":0,
    "out":2,
    "bearings":[60,150,240,330],
    "entry":["false","true","true","true"],
    "classes": ["toll", "restricted"],
    "lanes":{
        "indications": ["left", "straight"],
        "valid": false
    }
}
```

### Waypoint object

The object is used to describe the waypoint on a route.

**Properties**

- `name` Name of the street the coordinate snapped to
- `location` Array that contains the `[longitude, latitude]` pair of the snapped coordinate
- `distance` The distance, in meters, from the input coordinate to the snapped coordinate
- `hint` Unique internal identifier of the segment (ephemeral, not constant over data updates)
   This can be used on subsequent requests to significantly speed up the query and to connect multiple services.
   E.g. you can use the `hint` value obtained by the `nearest` query as `hint` values for `route` inputs.

#### Example

```json
{
   "hint" : "KSoKADRYroqUBAEAEAAAABkAAAAGAAAAAAAAABhnCQCLtwAA_0vMAKlYIQM8TMwArVghAwEAAQH1a66g",
   "distance" : 4.152629,
   "name" : "Friedrichstraße",
   "location" : [
      13.388799,
      52.517033
   ]
}
```

## Flatbuffers format

The default response format is `json`, but OSRM supports binary [`flatbuffers`](https://google.github.io/flatbuffers/) format, which 
is much faster in serialization/deserialization, comparing to `json`.

The format itself is described in message descriptors, located at `include/engine/api/flatbuffers` directory. Those descriptors could
be compiled to provide protocol parsers in Go/Javascript/Typescript/Java/Dart/C#/Python/Lobster/Lua/Rust/PHP/Kotlin. Precompiled 
protocol parser for C++ is supplied with OSRM.

`Flatbuffers` format provides exactly the same data, as `json` format with a slightly different layout, which was optimized to minimize
in-transfer size.

### Root object

Root object is the only object, available from a 'raw' `flatbuffers` buffer. It can be constructed with a following call:

auto osrm = osrm::engine::api::fbresult::GetFBResult(some_input_buffer);

**Properties**

- `error`: `bool` Marks response as erroneous. An erroneous response should include the `code` fieldset, all the other fields may not be present. 
- `code`: `Error` Error description object, only present, when `error` is `true`
- `waypoints`: `[Waypoint]` Array of `Waypoint` objects. Should present for every service call, unless `skip_waypoints` is set to `true`. Table service will put `sources` array here.
- `routes`: `[RouteObject]` Array of `RouteObject` objects. May be empty or absent. Should present for Route/Trip/Match services call.
- `table`: `Table` Table object, may absent. Should be present in case of Table service call.

### Error object

Contains error information.

**Properties**

- `code`: `string` Error code 
- `message`: `string` Detailed error message

### Waypoint object

Almost the same as `json` Waypoint object. The following properties differ:

- `location`: `Position` Same as `json` location field, but different format. 
- `nodes`: `Uint64Pair` Same as `json` nodes field, but different format.

### RouteObject object

Almost the same as `json` Route object. The following properties differ:

- `polyline`: `string` Same as `json` geometry.polyline or geometry.polyline6 fields. One field for both formats. 
- `coordinates`: `[Position]` Same as `json` geometry.coordinates field, but different format.
- `legs`: `[Leg]` Array of `Leg` objects.

### Leg object

Almost the same as `json` Leg object. The following properties differ:

- `annotations`: `Annotation` Same as `json` annotation field, but different format.
- `steps`: `[Step]` Same as `step` annotation field, but different format.

### Step object

Almost the same as `json` Step object. The following properties differ:

| `type`           | Description                                                                                                                                                                                                                                                                                                                  |
|------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `Turn`           | a basic turn into the direction of the `modifier`                                                                                                                                                                                                                                                                                |
| `NewName`        | no turn is taken/possible, but the road name changes. The road can take a turn itself, following `modifier`.                                                                                                                                                                                                                 |
| `Depart`         | indicates the departure of the leg                                                                                                                                                                                                                                                                                           |
| `Arrive`         | indicates the destination of the leg                                                                                                                                                                                                                                                                                         |
| `Merge`          | merge onto a street (e.g. getting on the highway from a ramp, the `modifier specifies the direction of the merge`)                                                                                                                                                                                                           |
| `OnRamp`         | take a ramp to enter a highway (direction given my `modifier`)                                                                                                                                                                                                                                                               |
| `OffRamp`        | take a ramp to exit a highway (direction given my `modifier`)                                                                                                                                                                                                                                                                |
| `Fork`           | take the left/right side at a fork depending on `modifier`                                                                                                                                                                                                                                                                   |
| `EndOfRoad`      | road ends in a T intersection turn in direction of `modifier`                                                                                                                                                                                                                                                                |
| `Continue`       | Turn in direction of `modifier` to stay on the same road                                                                                                                                                                                                                                                                     |
| `Roundabout`     | traverse roundabout, if the route leaves the roundabout there will be an additional property `exit` for exit counting. The modifier specifies the direction of entering the roundabout.                                                                                                                                      |
| `Rotary`         | a traffic circle. While very similar to a larger version of a roundabout, it does not necessarily follow roundabout rules for right of way. It can offer `rotary_name` and/or `rotary_pronunciation` parameters (located in the RouteStep object) in addition to the `exit` parameter (located on the StepManeuver object).  |
| `RoundaboutTurn` | Describes a turn at a small roundabout that should be treated as a normal turn. The `modifier` indicates the turn direction. Example instruction: `At the roundabout turn left`.                                                                                                                                               |
| `Notification`   | not an actual turn but a change in the driving conditions. For example the travel mode or classes. If the road takes a turn itself, the `modifier` describes the direction                                                                                                                                                   |
| `ExitRoundabout` | Describes a maneuver exiting a roundabout (usually preceded by a `roundabout` instruction)                                                                                                                                                                                                                                  |
| `ExitRotary`     | Describes the maneuver exiting a rotary (large named roundabout)                                                                                                                                                                                                                                                             |

- `driving_side`: `bool` Ttrue stands for the left side driving. 
- `intersections`: `[Intersection]` Same as `json` intersections field, but different format.

### Intersection object

Almost the same as `json` Intersection object. The following properties differ:

- `location`: `Position` Same as `json` location property, but in a different format.
- `lanes`: `[Lane]` Array of `Lane` objects.

### Lane object

Almost the same as `json` Lane object. The following properties differ:

- `indications`: `Turn` Array of `Turn` enum values.

| `value`                | Description                                                                                                               |
|------------------------|---------------------------------------------------------------------------------------------------------------------------|
| `None`                 | No dedicated indication is shown.                                                                                         |
| `UTurn`                | An indication signaling the possibility to reverse (i.e. fully bend arrow).                                               |
| `SharpRight`           | An indication indicating a sharp right turn (i.e. strongly bend arrow).                                                   |
| `Right`                | An indication indicating a right turn (i.e. bend arrow).                                                                  |
| `SlightRight`          | An indication indicating a slight right turn (i.e. slightly bend arrow).                                                  |
| `Straight`             | No dedicated indication is shown (i.e. straight arrow).                                                                   |
| `SlightLeft`           | An indication indicating a slight left turn (i.e. slightly bend arrow).                                                   |
| `Left`                 | An indication indicating a left turn (i.e. bend arrow).                                                                   |
| `SharpLeft`            | An indication indicating a sharp left turn (i.e. strongly bend arrow).                                                    |

### StepManeuver object

Almost the same as `json` StepManeuver object. The following properties differ:

- `location`: `Position` Same as `json` location property, but in a different format.
- `type`: `ManeuverType` Type of a maneuver (enum)

| `type`           | Description                                                  |
|------------------|--------------------------------------------------------------|
| `Turn`           | a basic turn into the direction of the `modifier`                |
| `NewName`        | no turn is taken/possible, but the road name changes. The road can take a turn itself, following `modifier`.                  |
| `Depart`         | indicates the departure of the leg                           |
| `Arrive`         | indicates the destination of the leg                         |
| `Merge`          | merge onto a street (e.g. getting on the highway from a ramp, the `modifier specifies the direction of the merge`) |
| `OnRamp`         | take a ramp to enter a highway (direction given my `modifier`) |
| `OffRamp`        | take a ramp to exit a highway (direction given my `modifier`)  |
| `Fork`           | take the left/right side at a fork depending on `modifier`   |
| `EndOfRoad`      | road ends in a T intersection turn in direction of `modifier`|
| `Continue`       | Turn in direction of `modifier` to stay on the same road     |
| `Roundabout`     | traverse roundabout, if the route leaves the roundabout there will be an additional property `exit` for exit counting. The modifier specifies the direction of entering the roundabout. |
| `Rotary`         | a traffic circle. While very similar to a larger version of a roundabout, it does not necessarily follow roundabout rules for right of way. It can offer `rotary_name` and/or `rotary_pronunciation` parameters (located in the RouteStep object) in addition to the `exit` parameter (located on the StepManeuver object).  |
| `RoundaboutTurn` | Describes a turn at a small roundabout that should be treated as a normal turn. The `modifier` indicates the turn direction. Example instruction: `At the roundabout turn left`. |
| `Notification`   | not an actual turn but a change in the driving conditions. For example the travel mode or classes. If the road takes a turn itself, the `modifier` describes the direction |
| `ExitRoundabout` | Describes a maneuver exiting a roundabout (usually preceded by a `roundabout` instruction) |
| `ExitRotary`    | Describes the maneuver exiting a rotary (large named roundabout) |

- `modifier`: `Turn` Maneuver turn (enum)

### Annotation object

Exactly the same as `json` annotation object.

### Position object

A point on Earth.

***Properties***
- `longitute`: `float` Point's longitude
- `latitude`: `float` Point's latitude

### Uint64Pair

A pair of long long integers. Used only by `Waypoint` object.

***Properties***
- `first`: `uint64` First pair value.
- `second`: `uint64` Second pair value.

### Table object

Almost the same as `json` Table object. The main difference is that 'sources' field is absent and the root's object 'waypoints' field is
used instead. All the other differences follow:

- `durations`: `[float]` Flat representation of a durations matrix. Element at row;col can be addressed as [row * cols + col]
- `distances`: `[float]` Flat representation of a destinations matrix. Element at row;col can be addressed as [row * cols + col]
- `destinations`: `[Waypoint]` Array of `Waypoint` objects. Will be `null` if `skip_waypoints` will be set to `true`
- `rows`: `ushort` Number of rows in durations/destinations matrices.
- `cols`: `ushort` Number of cols in durations/destinations matrices.

cmd: