Traffic - Get Traffic Flow Segment

Traffic Flow Segment

Applies to: S0 and S1 pricing tiers.

This service provides information about the speeds and travel times of the road fragment closest to the given coordinates. It is designed to work alongside the Flow layer of the Render Service to support clickable flow data visualizations. With this API, the client side can connect any place in the map with flow data on the closest road and present it to the user.

GET https://atlas.microsoft.com/traffic/flow/segment/{format}?api-version=1.0&style={style}&zoom={zoom}&query={query}
GET https://atlas.microsoft.com/traffic/flow/segment/{format}?subscription-key={subscription-key}&api-version=1.0&style={style}&zoom={zoom}&query={query}&unit={unit}&thickness={thickness}&openLr={openLr}

URI Parameters

Name In Required Type Description
format
path True

Desired format of the response. Value can be either json or xml.

subscription-key
query
  • string

One of the Azure Maps keys provided from an Azure Map Account. Refer to the subscription-key security definition.

api-version
query True
  • string

Version number of Azure Maps API. Current version is 1.0

style
query True

The style to be used to render the tile. Valid values are absolute which returns colors reflecting the absolute speed measured, relative which returns the speed relative to free-flow, Relative-delay which displays relative speeds only where they are different from the freeflow speeds

zoom
query True
  • integer

Zoom level for the desired tile. Zoom value must be in the range: 0-22 (inclusive). Please see Zoom Levels and Tile Grid for details.

query
query True
  • string

Coordinates of the point close to the road segment. They have to be comma-separated and calculated using EPSG4326 projection.

unit
query

Unit of speed in KMPH or MPH

thickness
query
  • integer

The segment width multiplier. Default: 10, minimum: 1 and maximum: 20

openLr
query
  • boolean

Boolean on whether the response should include OpenLR code

Request Header

Name Required Type Description
x-ms-client-id
  • string

Specifies which account is intended for usage in conjunction with the Azure AD security model. It represents a unique ID for the Azure Maps account and can be retrieved from Azure Maps management plane Account API. To use Azure AD security in Azure Maps see the following articles for guidance.

Responses

Name Type Description
200 OK

OK

Media Types: "application/json", "application/xml"

400 Bad Request

Bad request: one or more parameters were incorrectly specified or are mutually exclusive.

Media Types: "application/json", "application/xml"

401 Unauthorized

Access denied due to invalid subscription key or invalid Azure Active Directory bearer token. Make sure to provide a valid key for an active Azure subscription and Maps resource. Otherwise, verify the WWW-Authenticate header for error code and description of the provided AAD bearer token.

Media Types: "application/json", "application/xml"

Headers

  • WWW-Authenticate: string
403 Forbidden

Permission, capacity, or authentication issues.

Media Types: "application/json", "application/xml"

404 Not Found

Not Found: the requested resource could not be found, but it may be available again in the future.

Media Types: "application/json", "application/xml"

500 Internal Server Error

An error occurred while processing the request. Please try again later.

Media Types: "application/json", "application/xml"

Security

azure_auth

These are the Azure Active Directory OAuth2 Flows. When paired with Azure Role Based Access control it can be used to control access to Azure Maps REST APIs. Azure Role based access controls are used to designate access to one or more Azure Maps resource account or sub-resources. Any user, group, or service principal can be granted access via a built in role or a custom role composed of one or more permissions to Azure Maps REST APIs.

To implement scenarios we recommend viewing authentication concepts. In summary, this security definition provides a solution for modeling application(s) via objects capable of access control on specific APIs and scopes.

Note

  • This security definition requires the use of the x-ms-client-id header to indicate which Azure Maps resource the application is requesting access to. This can be acquired from the Maps management API.
  • The Authorization URL is specific to the Azure public cloud instance. Sovereign clouds have unique Authorization URLs and Azure Active directory configurations.
  • The Azure role based access control is configured from the Azure management plane via Azure portal, Powershell, CLI, Azure SDKs, or REST APIs.
  • Usage of the Azure Maps Web SDK allows for configuration based setup of an application for multiple use cases.
  • Currently Azure Active Directory v1.0 tokens are supported.

Type: oauth2
Flow: implicit
Authorization URL: https://login.microsoftonline.com/common/oauth2/authorize

subscription-key

This is a shared key which is provisioned when creating an Azure Maps resource through the Azure management plane via Azure portal, Powershell, CLI, Azure SDKs, or REST APIs. With this key, any application is authorized to access all REST APIs. In other words, these can currently be treated as master keys to the account which they are issued for. For publicly exposed applications our recommendation is to use server to server access of Azure Maps REST APIs where this key can be securely stored.

Type: apiKey
In: query

Examples

GetTrafficFlowSegment

Sample Request

GET https://atlas.microsoft.com/traffic/flow/segment/json?subscription-key=[subscription-key]&api-version=1.0&style=absolute&zoom=10&query=52.41072,4.84239

Sample Response

{
  "flowSegmentData": {
    "frc": "FRC3",
    "currentSpeed": 79,
    "freeFlowSpeed": 79,
    "currentTravelTime": 33,
    "freeFlowTravelTime": 33,
    "confidence": 0.5,
    "coordinates": {
      "coordinate": [
        {
          "latitude": 52.404648,
          "longitude": 4.8442388
        },
        {
          "latitude": 52.408447,
          "longitude": 4.8357286
        }
      ]
    },
    "openlr": null,
    "@version": "1.0.53-mascoma"
  }
}
{
  "error": {
    "code": "400 BadRequest",
    "message": "Bad request: one or more parameters were incorrectly specified or are mutually exclusive."
  }
}
{
  "error": {
    "code": "401 Unauthorized",
    "message": "Access denied due to invalid subscription key. Make sure to provide a valid key for an active subscription."
  }
}
{
  "error": {
    "code": "403 Forbidden",
    "message": "Permission, capacity, or authentication issues."
  }
}
{
  "error": {
    "code": "404 NotFound",
    "message": "Not Found: the requested resource could not be found, but it may be available again in the future."
  }
}
{
  "error": {
    "code": "500 InternalServerError",
    "message": "An error occurred while processing the request. Please try again later."
  }
}

Definitions

Coordinate

A location represented as a latitude and longitude.

Coordinates

Coordinates of the result

Error

This object is returned when an error occurs in the Maps API

ErrorResponse

This response object is returned when an error occurs in the Maps API

FlowSegmentData

Flow Segment Data property

SpeedUnit

Unit of speed in KMPH or MPH

TextFormat

Desired format of the response. Value can be either json or xml.

TrafficFlowSegmentResult

This object is returned from a successful Traffic Flow Segment call

TrafficFlowSegmentStyle

The style to be used to render the tile. Valid values are absolute which returns colors reflecting the absolute speed measured, relative which returns the speed relative to free-flow, Relative-delay which displays relative speeds only where they are different from the freeflow speeds

Coordinate

A location represented as a latitude and longitude.

Name Type Description
latitude
  • number

Latitude property

longitude
  • number

Longitude property

Coordinates

Coordinates of the result

Name Type Description
coordinate

Coordinate array

Error

This object is returned when an error occurs in the Maps API

Name Type Description
code
  • string

The HTTP status code.

message
  • string

If available, a human readable description of the error.

ErrorResponse

This response object is returned when an error occurs in the Maps API

Name Type Description
error

This object is returned when an error occurs in the Maps API

FlowSegmentData

Flow Segment Data property

Name Type Description
@version
  • string

@Version property

confidence
  • number

Confidence property

coordinates

Coordinates of the result

currentSpeed
  • integer

Current Speed property

currentTravelTime
  • integer

Current Travel Time property

frc
  • string

FRC property

freeFlowSpeed
  • integer

Free Flow Speed property

freeFlowTravelTime
  • integer

Free Flow Travel Time property

openlr
  • number

OpenLR code for segment

SpeedUnit

Unit of speed in KMPH or MPH

Name Type Description
KMPH
  • string

Kilometers Per Hour

MPH
  • string

Miles Per Hour

TextFormat

Desired format of the response. Value can be either json or xml.

Name Type Description
json
  • string

The JavaScript Object Notation Data Interchange Format

xml
  • string

The Extensible Markup Language

TrafficFlowSegmentResult

This object is returned from a successful Traffic Flow Segment call

Name Type Description
flowSegmentData

Flow Segment Data property

TrafficFlowSegmentStyle

The style to be used to render the tile. Valid values are absolute which returns colors reflecting the absolute speed measured, relative which returns the speed relative to free-flow, Relative-delay which displays relative speeds only where they are different from the freeflow speeds

Name Type Description
absolute
  • string
relative
  • string
relative-delay
  • string