# How are the towns on guidebook overview maps selected?

A short description of the algorithm that chooses the localities which are printed on the overview maps.

![GUIBO guidebook overview map](/files/gmpah593j5Hm5QxO9G4r)

1. Find all cities/towns/villages which are not more than 2.5 km away from any route in guidebook
2. Reduce amount of cities/towns/villages per route to not compromise the clarity of the map. Reduce to

        \- maximum of 3 per route for walking routes

        \- maximum of 4 per route for cycling routes 

        \- maximum of 5 per route for dirving routes. 

Select by highest population


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