From: https://commons.wikimedia.org/wiki/File:Plan_af_Helsingfors_1876.jpeg Uploaded by Susanna Ånäs. Last modified about 10 years ago. 3 control points.
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File:Plan af Helsingfors 1876.jpeg
From: https://commons.wikimedia.org/wiki/File:Plan_af_Helsingfors_1876.jpeg Uploaded by Susanna Ånäs. Last modified about 10 years ago. 3 control points. Links: Wikimedia Commons
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