L’Ufficio federale di topografia mette a disposizione su internet (swisstopo) oltre 300'000 immagini scattate da aerei dal 1920 ai giorni nostri. Le foto documentano i profondi cambiamenti del paesaggio, soprattutto dalla fine degli anni ’50 con lo sviluppo economico, gli eccessi ma anche le soluzioni architettoniche valide. Nelle due fotografie, Airolo come era nel 1961 e come si presentava nel 2003, 23 anni dopo l’apertura della galleria stradale.
Red.MM
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