Michael Spreng lives in Cham. He studied Computational Science and Engineering at ETH Zürich. He develops simulation software at a medium software company.
He noticed OpenStreetMap in 2009 and started mapping in his vicinity. He tries to map where ever he goes if he finds a few minutes to spare. He developed a view of winter sport slopes for the Waymarked Trail route maps and takes care of the comparison with the official public transport list DIDOK.