some station details with interpretaed sources of http://dmzap1.seoulmetro.co.kr/station/eng/stationguide.action?eng=Y&stationId=1454&mainLine=4 http://maps2.visitseoul.net/index.jsp?lang=eng note some alignment refinement is needed from a site visit but I hope to give functional start with things linking up. Ivistited this place some time ago and so I get the basic feel of what the diagrams are discribeing. much of the underground sections are based on cut and cover constuction under widened highways. there are multiple entances around road junctions and a top floor to the station that is oftern free to allow it to work as a pedestion crossing for the junction this site works as two with barriers across the mid part. this level or the lower one may hose an emergancy market {its still a war zone} beneth that is barrier gate and control room and beneath come vaorious platfrom levels. Haveing said that there is varity it the layout but this is oftern a logical order espcialy in the older middle bit. Some sections run above ground like crossing some rivers and some high level stations like at least one in the north east of the middle. Loosely based on US insperations like new york and chicago. Its young being about 40 years old but well established and expanding still.