English: The Metro Office's 1971 proposal for a rail network in Helsinki. Orange = the first metro line, purple = the U metro, black = railways, dashed lines = reservations, grey area = area of tolerance. Basemap from 2018.
Suomi: Metrotoimiston ehdotus Helsingin raideliikenteen perusverkoksi 1971. Oranssi = ensimmäinen metrolinja, purppura = U-metro, musta = rautatiet, katkoviivat = varaukset, harmaa alue = liikkuma-alue. Pohjakartta vuodelta 2018.
Svenska: Metrobyråns förslag 1971 på spårtrafikens basnätverk i Helsingfors. Orange = första metrolinjen, violett = U-metron, svart = järnvägar, streckad linje = reservationer, grått område = undersökningsområde. Baskarta från 2018.
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Own work based on "Helsingin kaupungin metrotoimisto. Raideliikenteen perusverkko 1971" (22.4.1971). Basemap by Maanmittauslaitos (CC BY 4.0)
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