Multimodal Travel-Time Maps

The following map shows an example of a schematic travel-time map generated for the city of bonn. Details on the creation of the map can be found here:

Forsch, A., Dehbi, Y., Niedermann, B., Oehrlein, J., Rottmann, P., & Haunert, J. H. (2021). Multimodal travel-time maps with formally correct and schematic isochrones. Transactions in GIS, 00, 1– 24.

The source code used to generate the map can be found here:

Start point:


7:30 minutes

15:00 minutes

22:30 minutes

30:00 minutes

Contact: Axel Forsch (, Geoinformation, University of Bonn, Germany