Mapper since: November 22, 2008 | Contributor terms: Accepted about 6 years ago

I am Alexander Matheisen from Neuss, Germany and student of Computer Science. I am an OpenStreetMap contributor since November 2008.

You can find more information on my wiki userpage and my website.

Mapping activities

  • mapping nearly everything in my hometown Neuss and neighbourhood (Kaarst, Meerbusch, Dormagen, Grevenbroich, Rommerskirchen, Krefeld, Düsseldorf)
  • mapping detailled railway infrastructure for OpenRailwayMap in Germany and Austria
  • mapping in rural areas while hiking and cycling, supported by aerial imagery (especially while traveling)
  • tracing landuses, buildings, roads, trails and improving alignment of existing features using aerial imagery
  • mapping historical objects (abandoned railways, bunkers, etc.) and heritage buildings
  • mapping public transport
  • monitoring edits with Achavi and WhoDidIt in my home region to discover vandalism, find mistakes made by newbies and visualize the activity of (new) mappers
  • railway mapping summer tour in Eastern Germany together with Nakaner in August 2015
  • heatmap of my edits
  • edit statistics


  • Garmin eTrex Vista HCx + 2 GB microSD + All in One Map
  • DSLR camera
  • camcorder (mainly for railway mapping)
  • paper and pen
  • Samsung Galaxy S5 (for tracking, taking photos and notes)
  • JOSM on Ubuntu Mate

Other Activities