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TravelTime API
Developer Tools
Database Plugins
TravelTime API
TravelTime API
Isochrone API
Distance Map API
TravelTime API
Travel Time Matrix API
Travel Time Matrix API
Protocol Buffers
TravelTime API
Routes API
Geocoding API
Additional API Reference
Error Handling
TravelTime API
ArcGIS plugin
QGIS plugin
Alteryx plugin

Isochrone API Use Casesanchor icon

What is an isochrone?anchor icon

Isochrone maps, also known as travel time polygons or travel time maps, are maps that show all reachable locations within a specified limit by a specified mode of transport. They are most used to depict travel times, such as drawing a 30-minute travel time perimeter around a start location.

Practical applicationsanchor icon

Online map viewanchor icon

Customise your maps online by overlaying travel time polygons on top of map tiles.

Online map view

Heat mapanchor icon

Create and combine many travel time polygons, then adjust the colour intensity to show a variable scale.

Heat map

Choropleth mapanchor icon

Customise your maps online by overlaying travel time polygons on top of map tiles.

Choropleth map

Population analysisanchor icon

Customise your maps online by overlaying travel time polygons on top of map tiles.

Population analysis

Site selectionanchor icon

Use polygons and third party data to select the optimal location for your office, hospital, supply chain depot, outdoor advertising campaign etc. Combining travel time data with population data or other data sets will help you understand the best location for you.

Site selection

Sales territory planning anchor icon

Draw travel time polygon catchment areas to allocate sales territories. Increase efficiencies and reduce costs by helping people spend less time on the road, and more time with clients.

Sales territory planning

Featuresanchor icon

Holesanchor icon

Travel time catchment areas are rarely a perfect circle. That’s because some areas within your polygon may be hard to access within the time limit. We call these accessibility blackspots Holes.


Islandsanchor icon

Your travel time catchment area may consist of more than one polygon. That’s just the nature of how transport networks are designed, sometimes you can get somewhere further away, even if you can’t access the places in between. Public transport islands often occur if there’s a fast train route and driving islands may highlight the location of a motorway exit.


Unionsanchor icon

After you request multiple isochrones, you can combine them into a single area.


Intersectionsanchor icon

After you request multiple isochrones, you can highlight the area that’s mutually reachable. For example, you can create a 30 minute catchment for 2 people living at different sides of the city. The mutual area shows where’s accessible for both people.


Granularityanchor icon

This indicates how detailed your isochrone polygons will look. If you want them to have smooth lines, choose a low number. If you’d prefer to see the exact area that’s accessible, it’s advised to choose a high granularity.