I am an active mapper in Germany, living close to Aachen at the border to the Netherlands.
I have done mappings in:
Herzogenrath, Alsdorf, Würselen, Übach-Palenberg, Wurmtal, Teverner Heide, and a number of other small places.

OpenStreetMap is a free editable map of the whole world. It is made by people like you.

OpenStreetMap allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth.

OpenStreetMap's hosting is kindly supported by the UCL VR Centre and bytemark.