Raster Flow Tiles

Service version: 4

Last edit: 2022.08.15

Purpose

The TomTom Traffic Raster Flow Tile service serves 256 x 256 pixel or 512 x 512 pixel tiles showing traffic flow. All tiles use the same grid system. Because the traffic tiles use transparent images, they can be layered on top of map tiles to create a compound display. The Raster Flow tiles use colors to indicate either the speed of traffic on different road segments, or the difference between that speed and the free-flow speed on the road segment in question.

Run this endpoint

You can easily run this and other endpoints. Go to the TomTom API Explorer page and follow the directions.

Styles description

Style details

Name	Relation to speed	Speed intervals	Line outline colors	Line main colors	Dash colors
`absolute`	absolute	0 &le speed < 1 1 ≤ speed < 60 60 ≤ speed < 120 120 ≤ speed	`#3C3C3C` `#801212` `#80801C` `#166416`	`#777777` `#FF2323` `#FFFF37` `#2BC82B`	No dashes
`relative`	relative to free-flow	0 ≤ speed < 0.01 0.01 ≤ speed < 0.8 0.8 ≤ speed < 1 speed = 1	`#3C3C3C` `#801212` `#80801C` `#166416`	`#777777` `#FF2323` `#FFFF37` `#2BC82B`	No dashes
`relative0`	relative to free-flow	road closed 0 ≤ speed < 0.15 0.15 ≤ speed < 0.35 0.35 ≤ speed < 0.75 0.75 ≤ speed	`#666666` `#A50704` `#DF4B15` `#E87B3D` `#245723`	`#C1272D` `#E70704` `#F18237` `#F1BF40` `#2EAB30`	`#F2F2F2` `#CC0704` `#EC6736` `#F1A828` No dashes
`relative0-dark`	relative to free-flow	road closed 0 ≤ speed < 0.15 0.15 ≤ speed < 0.35 0.35 ≤ speed < 0.75 0.75 ≤ speed	`#474747` `#730402` `#9B340E` `#A2562A` `#193C18`	`#861B1F` `#A10402` `#A85A26` `#A9862C` `#207721`	`#A8A8A8` `#8E0402` `#A54825` `#A9751C` No dashes
`relative-delay`	relative to free-flow	0 ≤ speed < 0.01 0.01 ≤ speed < 0.8 0.08 ≤ speed < 1 speed = 1	`#3C3C3C` `#801212` `#80801C` `#166416`	`#777777` `#FF2323` `#FFFF37` `#2BC82B`	No dashes
`reduced-sensitivity`	relative to free-flow	0 ≤ speed < 0.01 0.01 ≤ speed < 0.53 0.53 ≤ speed < 0.67 0.67 ≤ speed	`#3C3C3C` `#801212` `#80801C` `#166416`	`#777777` `#FF2323` `#FFFF37` `#2BC82B`	No dashes

Style examples

Example of `relative0` style

Example of `relative0-dark` style

Request data

HTTPS method: `GET`

Constants and parameters enclosed in curly brackets { } must be replaced with their values.
Please see the following Request parameters section with the required and optional parameters tables for their values. The generic request format is as follows.

URL format

https://{baseURL}/traffic/map/{versionNumber}/tile/flow/{style}/{zoom}/{x}/{y}.{format}?key={Your_API_Key}&thickness={thickness}&tileSize={tileSize}

Example

https://api.tomtom.com/traffic/map/4/tile/flow/absolute/12/2044/1360.png?key={Your_API_Key}

curl command format

curl 'https://{baseURL}/traffic/map/{versionNumber}/tile/flow/{style}/{zoom}/{x}/{y}.{format}?key={Your_API_Key}&thickness={thickness}&tileSize={tileSize}'

Request parameters

The following table describes all of the parameters that can be used in a request.

Required parameters must be used or the call will fail.
Parameters and values are case-sensitive.
Optional parameters may be used.

Required parameters	Description
`baseURL` string	Base URL for calling TomTom services. Values: `api.tomtom.com`: The default global API endpoint. `kr-api.tomtom.com`: The region-specific endpoint for South Korea. See the region-specific content documentation.
`versionNumber` string	Version of the service to call. Value: The current value is `4`.
`style` string	The style to be used to render the tile. When the style is `absolute`, the colors will reflect the absolute speed measured. Calls using the `relative`, `relative0` and `relative0-dark` styles return the speed relative to free-flow, highlighting areas of congestion. Style `relative-delay` displays relative speeds only where they are different from the free-flow speeds. Style `reduced-sensitivity` displays relative speeds, but a larger difference from free-flow (depending on FRC) is required for a segment to change the color. Styles `relative0` and `relative0-dark` are recommended to use. Values: `absolute` `relative` `relative0` `relative0-dark` `relative-delay` `reduced-sensitivity`
`zoom` integer	Zoom level of the tile to be rendered. Value: `0..22`
`x` integer	x coordinate of the tile on the zoom grid. Value: 0..2 ^zoom -1
`y` integer	y coordinate of tile on zoom grid. Value: 0..2 ^zoom -1
`format` string	The format of the response. Value: `png`
`apiKey` string	API Key valid for requested service. Value: Your valid `API Key`.

Optional parameters	Description
`thickness` integer	The segment width multiplier. This parameter can only be used with the following styles: `absolute` `relative` `relative-delay` `reduced-sensitivity` Value: `1..20` Default value: `10`
`tileSize` integer	The tile size dimension in pixels. Values: `256` `512` Default value: `256`

Optional parameters

Description

thickness
integer

The segment width multiplier. This parameter can only be used with the following styles:

absolute
relative
relative-delay
reduced-sensitivity

Value: 1..20
Default value: 10

tileSize
integer

The tile size dimension in pixels.
Values:

256
512

Default value: 256

Note that the flow layer can create a patchwork tile effect if the flow traffic data changes between calls of adjacent tiles.

Request headers

The following table lists HTTP request headers of particular interest to clients of the Raster Flow Tiles API endpoint. Note: There are no required headers in this endpoint.

Optional headers	Description
Tracking-ID	Specifies an identifier for the request. It can be used to trace a call. The value must match the regular expression `'^[a-zA-Z0-9-]{1,100}$'`. An example of the format that matches this regular expression is a UUID (e.g., `9ac68072-c7a4-11e8-a8d5-f2801f1b9fd1` ). For details check RFC 4122. If specified, it is replicated in the Tracking-ID response header. It is only meant to be used for support and does not involve tracking of you or your users in any form. Value: `<string>`
Accept	Advertises which content types, expressed as MIME types, the client is able to understand. In this service, the header is used to specify a preferred Bad Request response format. Format: `Accept: type/subtype` `Accept: type/subtype, type/subtype` - for multiple types Value: `type/subtype` is one of: `image/png` - in case of the `200 OK` `application/json` - in case of the `400 Bad Request` `text/xml` - in case of the `400 Bad Request` Examples: `Accept: application/json` `Accept: image/png, application/json`

Optional headers

Description

Tracking-ID

Specifies an identifier for the request. It can be used to trace a call. The value must match the regular expression '^[a-zA-Z0-9-]{1,100}$'. An example of the format that matches this regular expression is a UUID (e.g., 9ac68072-c7a4-11e8-a8d5-f2801f1b9fd1 ). For details check RFC 4122. If specified, it is replicated in the Tracking-ID response header. It is only meant to be used for support and does not involve tracking of you or your users in any form.
Value: <string>

Advertises which content types, expressed as MIME types, the client is able to understand. In this service, the header is used to specify a preferred Bad Request response format.
Format:

Accept: type/subtype
Accept: type/subtype, type/subtype - for multiple types

Value: type/subtype is one of:

image/png - in case of the 200 OK
application/json - in case of the 400 Bad Request
text/xml - in case of the 400 Bad Request

Examples:

Accept: application/json
Accept: image/png, application/json

Response data

Successful response

The Raster Flow Tiles API endpoint for a valid single request returns a response in PNG format. See: Style examples for more.

Error response

The Raster Flow Tiles API endpoint, for an invalid single request, returns a response body in XML or JSON format. By default the error response is returned in XML format. In order to obtain an error response in JSON format, the Accept request header with a proper value must be used. The types of the fields refer to a JSON response.

Error response field structure

Field	Description
`detailedError` object	Main object of the error response.
`code` string	One of a server-defined set of error codes.
`message` string	A human-readable description of the error code.

1<errorResponse errorCode="400" description="z out of range 0 <= z <= 22" version="traffic-rasterizer 2.0.009">
2  <detailedError>
3    <code>INVALID_REQUEST</code>
4    <message>z out of range 0 <= z <= 22</message>
5  </detailedError>
6</errorResponse>

1{
2  "detailedError": {
3    "code": "INVALID_REQUEST",
4    "message": "z out of range 0 <= z <= 22"
5  }
6}

Response codes

Code	Meaning & possible causes
`200`	OK
`400`	Bad request Unknown style: The requested style is not available. zoom n is out of range [0,22] : The requested zoom level is out of the possible range. x n is out of range [0,2 zoom -1] : The requested x coordinate is out of the possible range. y n is out of range [0,2 zoom -1] : The requested y coordinate is out of the possible range. Unknown format: The requested format is not supported. Invalid thickness parameter value. Invalid combination of the style and thickness parameter.
`403`	Forbidden: The supplied API Key is not valid for this request.
`405`	Method Not Allowed: The provided HTTP request method is known by the server, but is not supported by the target resource.
`429`	Too Many Requests: Too many requests were sent in a given amount of time for the supplied API Key.
`500`	Internal Server Error.
`503`	Service currently unavailable.
`596`	Service Not Found: Unknown version of the service.

Response headers

The following table lists HTTP response headers of particular interest to clients of the Raster Flow Tiles API endpoint.

Header	Description
Access-Control-Allow-Origin	Indicates that cross-origin resource sharing (CORS) is allowed. Value: `*`
Allow	Lists the set of supported HTTP methods. The header is sent in case a `405` HTTP response code is returned. Values: `GET`, `HEAD`
Cache-Control	Contains directives for a caching mechanism. Values: `private`, `no-cache`, `no-store`, `max-age=0`, `must-revalidate`
Content-Length	Contains information about the size of the response body. Value: `<decimal number>`
Content-Type	Indicates the media type of the resource returned. Values: `image/png` - in case of the `200 OK` `application/json; charset=utf-8` - in case of the `400 Bad Request` `text/xml; charset=utf-8` - in case of the `400 Bad Request`
Date	Contains the date and time when the message was originated. Value: `<http-date>`
Tracking-ID	An identifier for the request. If the Tracking-ID header was specified in the request, it is replicated in the response. Otherwise, it is generated automatically by the service. For details check RFC 4122. It is only meant to be used for support and does not involve tracking of you or your users in any form. Value: `<string>`