The line from Suwon to Omokcheon is mainly through build-up area, but after Omokcheon the country really opens up. The dominating feature here is the KTX viaduct built to allow the high speed railway run without interruption from Seoul to Busan. This area is now relatively busy, there are now quite a few people living in the area and many roads are now crossing through the valley. These roads of course were the main reason why the railway was abandoned to begin with: first the buses and later private ownership of cars dealt the final blow to the railway in this area. However, ironically it is the construction of the new commuter line that has destroyed the line in parts of this area.
The map below shows the whole line between Suwon and Ansan. The first article described the part between numbers 1 and 2. This second article describes the line from just to the west of (2) and to the south of (4), mainly around (3).
The rest of the story is available after the break.