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Raster Flow Tiles


Service version: 4
Last edit: 2019.03.01

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The TomTom Flow Tile service serves 256 x 256 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. See the following image.

raster image

Run this endpoint

You can easily run this and other endpoints.

  1. Go to the TomTom API Explorer page.
  2. 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.
  3. Review the Response.

Request data

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.


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
Base URL for calling TomTom services.
Version of the service to call.
Value: The current value is 4.
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 style return the speed relative to free-flow, highlighting areas of congestion.
  • Relative-delay displays relative speeds only where they are different from the freeflow speeds.
  • Reduced-sensitivity displays relative speeds but larger difference from freeflow (depending on FRC) is required for segment to change the color.


  • absolute
  • relative
  • relative-delay
  • reduced-sensitivity
Zoom level of the tile to be rendered.
Value: 0..22
x coordinate of the tile on the zoom grid.
Values: 0..2 zoom -1
y coordinate of tile on zoom grid.
Values: 0..2 zoom -1
The mime type for the Response.
Value: png
API Key valid for requested service.
Value: Your valid API Key.
Optional parameters
Parameter Description
The segment width multiplier.
Default value: 10
Other values: 1..20

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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Response data

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 [0,2zoom-1]: The requested x coordinate is out of the possible range.
  • y n is out of range [0,2zoom-1]: The requested y coordinate is out of the possible range.
  • Unknown format: The requested format is not supported.
  • Invalid thickness parameter value.
403 Forbidden: The supplied API Key is not valid for this request.
500 Internal Server Error.
503 Service currently unavailable.
596 Service Not Found: Unknown version of the service.

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