Also worth mentioning when it comes to adding trees to OpenStreetMap and having the species recognized automatically: https://mapcomplete.osm.be/trees.html

At the centrepoint of switzerland, there is a wall built like the shape of switzerland: osm.org/way/356836714

Thank you very much for your comment. What is actually the difference between OpenSidewalks and AccessMap? Is OpenSidewalks only a proposal and AccessMap the first implementation?