There is a big continuity error in the Book "Our Friends the Machines" about the location of Stenhamra and Väsby.
So, in the official world map for the Mälaren Facility, both locations are inland, with a forest between them and Långtarmen, but in this book, there is a map of Stenhamra (page 14) where both Stenhamra and Väsby are directly at the water at Långtarmen.
Then, on page 35, the town is back at its original location from the original map.