Raster Flow Tiles

The TomTom 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 Traffic 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.

You can easily run this and other endpoints.

Go to the TomTom API Explorer page.
Click an endpoint.
1. Click Try it out.
2. Enter/select all required parameter values and any optional parameter values.
3. At the bottom of the form, click Execute.
Review the Response.

Style details
Name	Relation to speed	Speed intervals	Line outline colors	Line main colors	Dash colors
`absolute`	absolute	0 ≤ 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

relative0 example

Example of `relative0-dark` style

relative0-dark example

HTTPS method: GET

URL format

For ease of viewing and identification:

Required constants and parameters are shown in bold text.
Optional parameters are shown in plain text.

http(s)://baseURL/traffic/map/versionNumber/tile/flow/style/zoom/x/y.mimeType?key=Your_API_Key&thickness=thickness

Example

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

curl command

curl -XGET 'http(s)://baseURL/traffic/map/versionNumber/tile/flow/style/zoom/x/y.mimeType?key=Your_API_Key&thickness=thickness'

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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.
If an optional parameter is not specified, where applicable, the default value listed in the table below will be used.

Required parameters
Parameter	Description
`baseURL` string	Base URL for calling TomTom services. Value: `api.tomtom.com`
`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 larger difference from free-flow (depending on FRC) is required for segment to change the color. Styles `relative0` and `relative0-dark` are recommended to use. Value: `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`
`mimeType` string	The mime type for the Response. Value: `png`
`apiKey` string	API Key valid for requested service. Value: Your valid API Key.
Optional parameters
Parameter	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. Value: `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.

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HTTP Request headers

The following table lists HTTP Response headers of particular interest to clients of the Traffic Incident Raster Tiles API endpoint.

Required headers
Note: There are no required headers in this endpoint.
Optional headers
Parameter	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`

HTTP Response Codes

Code	Meaning and 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.
`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.

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HTTP Response headers

The following table lists HTTP Response headers of particular interest to clients of the Traffic Incident Raster Tiles API endpoint.

Header	Description
`Access-Control-Allow-Origin`	Indicates that cross-origin resource sharing (CORS) is allowed. Value: `*`
`Cache-Control`	Contains directives for a caching mechanism. Value: `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. Value: `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 at which 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>`

Raster Flow Tiles

On this page

Purpose

Run this endpoint

Styles description

Style examples

Example of `relative0` style

Example of `relative0-dark` style

Request data

HTTPS method: GET

URL format

Example

curl command

Request parameters

HTTP Request headers

Response data

HTTP Response Codes

HTTP Response headers

Raster Flow Tiles

On this page

Purpose

Run this endpoint

Styles description

Style examples

Example of relative0 style

Example of relative0-dark style

Request data

HTTPS method: GET

URL format

Example

curl command

Request parameters

HTTP Request headers

Response data

HTTP Response Codes

HTTP Response headers

Example of `relative0` style

Example of `relative0-dark` style