The following Mapathons are open for registration (anyone can attend). Both Mapathons are supporting “3FM  Serious Request: The Lifeline.”

  • Friday December 21st, 10:00-22:00.
    In Tivoli, cafe “Het gegeven paard”
    Vredenburgkade 11, Utrecht (5 minutes from Utrecht Central Station)
  • Saturday December 22nd, 10:00-18:00.
    rasserie “De Utrechter”, first floor – Social Impact factory.
    Vredenburg 40, Utrecht. Just across the street from Tivoli.

    Get sponsored by friends, family, neighbors or colleagues. Every sponsor supports you with X amount for each hour that you are mapping. All money will go directly to 3FM Serious Request: The Lifeline. Use this form to activate your sponsors:

  • invulformulier_sponsor_mapathon

The 510 team coordinates public Mapathons in The Netherlands. We map areas where help is needed, based on requests from the Netherlands Red Cross. 510 prepares the area to be mapped, supports Mapathons and other mapping actions. During these events, we give a short introduction and instruction. If you want to contribute to these mapping events, you can register for an open Mapathon.

We also organize special Mapathons for the validation of mapped areas. A second set of eyes will ‘validate’ an already mapped area. We always provide a training for these mapping events.

Every 4 weeks on a Friday, a group of validators gather in Utrecht at Webmapper from 10.00 – 14.00. If you are interested to join this group, please send an email to



  • Green: Open mapathons, planned
  • Red: Closed mapathons, planned
  • Pink: Details will follow, planned
  • Grey: Past mapathons


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