General options

All OSRM HTTP requests use a common structure.

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

Requests

Parameter Description
service One of the following values: route , nearest , table , match , trip , tile
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}) .
format Only json is supported at the moment. 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.

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 clockwise direction.
radiuses {radius};{radius}[;{radius} ...] Limits the search to given radius in meters.
hints {hint};{hint}[;{hint} ...] Hint from previous request to derive position in street network.

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

The number of elements must match exactly the number of locations. If you don't want to pass a value but instead use the default you can pass an empty element.

Example: 2nd location use the default value for option:

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

Example Requests

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

Responses

Every response object has a code field 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 synctactically malformed.
InvalidValue The successfully parsed query parameters are invalid.
NoSegment One of the supplied input coordinates could not snap to 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.

Example response

{
"code": "Ok",
"message": "Everything worked"
}

Services

Nearest service

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

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

In addition to the 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.

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:

    • distance: Distance in meters to the supplied input coordinate.
GET
http://{server}/nearest/v1/{profile}/{coordinates}.json?number={number}

Example Requests

# 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

{
   "waypoints" : [
      {
         "hint" : "KSoKADRYroqUBAEAEAAAABkAAAAGAAAAAAAAABhnCQCLtwAA_0vMAKlYIQM8TMwArVghAwEAAQH1a66g",
         "distance" : 4.152629,
         "name" : "Friedrichstraße",
         "location" : [
            13.388799,
            52.517033
         ]
      },
      {
         "hint" : "KSoKADRYroqUBAEABgAAAAAAAAAAAAAAKQAAABhnCQCLtwAA7kvMAAxZIQM8TMwArVghAwAAAQH1a66g",
         "distance" : 11.811961,
         "name" : "Friedrichstraße",
         "location" : [
            13.388782,
            52.517132
         ]
      },
      {
         "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.

In addition to the general options the following options are supported for this service:

Option Values Description
alternatives true , false (default) Search for alternative routes and return as well. *
steps true , false (default) Return route steps for each route leg
annotations true , false (default) 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.

* Please note that even if an alternative route is 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 codes are supported in addition to the general ones:

Type Description
NoRoute No route found.

All other fields might be undefined.

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

Example Request

# 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.

Coordinates

In addition to the 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.

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

Example:

sources=0;5;7&destinations=5;1;4;2;3;6
Element Values
index 0 <= integer < #locations

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 waypoint to the j-th waypoint. Values are given in seconds.
  • sources array of Waypoint objects describing all sources in order
  • destinations array of Waypoint objects describing all destinations in order

In case of error the following codes are supported in addition to the general ones:

Type Description
NoTable No route found.

All other fields might be undefined.

GET
/table/v1/{profile}/{coordinates}?{sources}=[{elem}...];&destinations=[{elem}...]

Example Request

# Returns a 3x3 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 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 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'

Match service

Map matching matches/snaps given GPS points to the road network in the most plausible way. Please note the request might result 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.

In addition to the general options the following options are supported for this service:

Option Values Description
steps true , false (default) Return route steps for each route
geometries polyline (default), polyline6 , geojson Returned route geometry format (influences overview and per step)
annotations true , false (default) 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.
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).

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 trace point was ommited 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.
  • 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 codes are supported in addition to the general ones:

Type Description
NoMatch No matchings found.

All other fields might be undefined.

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

Trip service

The trip plugin solves the Traveling Salesman Problem using a greedy heuristic (farthest-insertion algorithm). The returned path does not have to be the fastest path, as TSP is NP-hard it is only an approximation. Note that if the input coordinates can not be joined by a single trip (e.g. the coordinates are on several disconnected islands) multiple trips for each connected component are returned.

In addition to the general options the following options are supported for this service:

Option Values Description
steps true , false (default) Return route instructions for each trip
annotations true , false (default) 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.

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 codes are supported in addition to the general ones:

Type Description
NoTrips No trips found.

All other fields might be undefined.

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

Tile service

This service generates Mapbox 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.

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.

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:

Field 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
datasource string the source for the speed value (normally lua profile unless you're using the traffic update feature , 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
name string the name of the road this segment belongs to

turns layer:

Field 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").
GET
/tile/v1/{profile}/tile({x},{y},{zoom}).mvt

Example request

# 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 http://map.project-osrm.org/debug/#14.33/52.5212/13.3919

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 field for a parameter documentation.

overview Description
simplified Geometry is simplified according to the highest zoom level it can still be displayed on full.
full Geometry is not simplified.
false Geometry is not added.
  • legs: The legs between the given waypoints, an array of RouteLeg objects.

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

Example

{
  "distance": 90.0,
  "duration": 300.0,
  "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.
  • summary: Summary of the route taken as string. Depends on the steps parameter:
steps
true Names of the two major roads used. Can be empty if 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 the route geometry:
annotations
true An Annotation object containing node ids, durations and distances
false undefined

With steps=false and annotations=true:

Example

{
  "distance": 30.0,
  "duration": 100.0,
  "steps": [],
  "annotation": {
    "distance": [5,5,10,5,5],
    "duration": [15,15,40,15,15],
    "datasources": [1,0,0,0,1],
    "nodes": [49772551,49772552,49786799,49786800,49786801,49786802]
  }
}

Annotation object

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

Properties

  • distance: The distance, in metres, between each pair of coordinates
  • duration: The duration between each pair of coordinates, in seconds
  • datasources: The index of the datasource for the speed between each pair of coordinates. 0 is the default profile, other values are supplied via --segment-speed-file to osrm-contract
  • nodes: The OSM node ID for each coordinate along the route, excluding the first/last user-supplied coordinates

Example

{
  "distance": [5,5,10,5,5],
  "duration": [15,15,40,15,15],
  "datasources": [1,0,0,0,1],
  "nodes": [49772551,49772552,49786799,49786800,49786801,49786802]
}

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.
geometry
polyline polyline with precision 5 in [ latitude,longitude ] encoding
polyline6 polyline with precision 6 in [ latitude,longitude ] encoding
geojson GeoJSON 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: The pronunciation hint of the way name. Will be undefined if there is no pronunciation hit.
  • destinations: The destinations of the way. Will be undefined if there are no destinations.
  • 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

Example

{
   "geometry" : "{lu_IypwpAVrAvAdI",
   "mode" : "driving",
   "duration" : 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.

  • bearing_after: The clockwise angle from true north to the direction of travel immediately after the maneuver.

  • 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 existance of correct modifier values is guranteed.

type Description
turn a basic turn into 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 going straight on a specific lane
continue Turn in direction of modifier to stay on the same road
roundabout traverse roundabout, has additional field exit with NR if the roundabout is left. 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/rotary_pronunciation in addition to the exit parameter.
roundabout turn Describes a turn at a small roundabout that should be treated as normal turn. The modifier indicates the turn direciton. Example instruction: At the roundabout turn left .
notification not an actual turn but a change in the driving conditions. For example the travel mode. If the road takes a turn itself, the modifier describes the direction

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 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 field.

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 number of the exit to take. The field exists for the following type field:

type Description
roundabout / rotary Number of the roundabout exit to take. If exit is undefined the destination is on the roundabout.
else Indicates the number of intersections passed until the turn. Example instruction: at the fourth intersection, turn left

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: a 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

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

Intersection object

An intersection gives a full representation of any cross-way the path passes bay. 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.
  • 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

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

Waypoint object

Object used to describe 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 of the snapped point from the original
  • hint Unique internal identifier of the segment (ephemeral, not constant over data updates) This can be used on subsequent request 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

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

Introduction

OSRM can be used as a library (libosrm) via C++ instead of using it through the HTTP interface and osrm-routed. This allows for fine-tuning OSRM and has much less overhead. Here is a quick introduction into how to use libosrm in the upcoming v5 release.

Take a look at the example code that lives in the example directory. Here is all you ever wanted to know about libosrm, that is a short description of what the types do and where to find documentation on it:

Important interface objects

  • EngineConfig - for initializing an OSRM instance we can configure certain properties and constraints. E.g. the storage config is the base path such as france.osm.osrm from which we derive and load france.osm.osrm.* auxiliary files. This also lets you set constraints such as the maximum number of locations allowed for specific services.

  • OSRM - this is the main Routing Machine type with functions such as Route and Table. You initialize it with a EngineConfig. It does all the heavy lifting for you. Each function takes its own parameters, e.g. the Route function takes RouteParameters, and a out-reference to a JSON result that gets filled. The return value is a Status, indicating error or success.

  • Status - this is a type wrapping Error or Ok for indicating error or success, respectively.

  • TableParameters - this is an example of parameter types the Routing Machine functions expect. In this case Table expects its own parameters as TableParameters. You can see it wrapping two vectors, sources and destinations --- these are indices into your coordinates for the table service to construct a matrix from (empty sources or destinations means: use all of them). If you ask yourself where coordinates come from, you can see TableParameters inheriting from BaseParameters.

  • BaseParameter - this most importantly holds coordinates (and a few other optional properties that you don't need for basic usage); the specific parameter types inherit from BaseParameters to get these member attributes. That means your TableParameters type has coordinates, sources and destination member attributes (and a few other that we ignore for now).

  • Coordinate - this is a wrapper around a (longitude, latitude) pair. We really don't care about (lon,lat) vs (lat, lon) but we don't want you to accidentally mix them up, so both latitude and longitude are strictly typed wrappers around integers (fixed notation such as 13423240) and floating points (floating notation such as 13.42324).

  • Parameters for other services - here are all other *Parameters you need for other Routing Machine services.

  • JSON - this is a sum type resembling JSON. The Routing Machine service functions take a out-ref to a JSON result and fill it accordingly. It is currently implemented using mapbox/variant which is similar to Boost.Variant. There are two ways to work with this sum type: either provide a visitor that acts on each type on visitation or use the get function in case you're sure about the structure. The JSON structure is written down in the HTTP API.

Example

See the example folder in the OSRM repository.

Workflow

  • Create an OSRM instance initialized with a EngineConfig
  • Call the service function on the OSRM object providing service specific *Parameters
  • Check the return code and use the JSON result
OSRM API Documentation