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Turn travel areas into territories

The postcode tools connect a calculated road-travel area to the postcode boundary map. This is useful for producing an area list or a first draft of a delivery territory.

Watch the related tutorial Opens YouTube · some videos show an earlier layout

See it on the map

Real map artwork · example settings
Three nested irregular travel-area bands over a Yorkshire map, with a separate key for 10, 20 and 30 minutes. The screenshot states that the contours are illustrative, not a calculated journey.
Travel areas on the map. Isochrones are travel-area shapes. Their irregular edges show why a time-based catchment can look very different from a circle: the available network affects how far you can travel. This is an illustrative display made with the tool’s renderer, not a calculated route or journey-time estimate. Use Create areas with your own starting location and settings to calculate your map.
Turn travel areas into territories — current GBMaps controls 1 2 3
Current panel with an example travel result. The picture illustrates the controls, not a real journey calculation.
  1. Find postcode centres

    After creating travel areas, open Postcode tools and run the postcode search. It tests whether the representative centre of a postcode polygon lies within the travel area. It does not test every address or every point on the polygon boundary.

  2. Postcode, zone name

    Copy the result into a spreadsheet to review it or use it in another task. Inspect large polygons along the edge: their centre can be inside the travel area while part of the boundary lies outside it.

  3. Colour postcodes

    Applies the list as territory colouring. This is a separate operation from calculating and displaying travel shapes. Save a version before using it to replace hand-built territory assignments.

  4. Recalculate before reusing a list

    If you change the origin or travel limits, create the new areas and find the postcodes again. A previously copied result is a snapshot of the earlier calculation.

Panel detail

Select a number to read its explanation. For small text, choose Actual size and scroll across the picture.