Mittakaava laskettu janamittakaavasta.
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Engraving by <a href="//commons.wikimedia.org/w/index.php?title=Creator:E._%C3%85kerlund&amp;action=edit&amp;redlink=1" class="new" title="Creator:E. Åkerlund (page does not exist)">Creator:E. Åkerlund</a> <a href="//commons.wikimedia.org/w/index.php?title=Creator:E._Personne&amp;action=edit&amp;redlink=1" class="new" title="Creator:E. Personne (page does not exist)">Creator:E. Personne</a></div>
National Library of Finland has digitized and shared this file on Wikimedia Commons.  <a rel="nofollow" class="external text" href="http://www.doria.fi/handle/10024/91979"> Description page.</a><a rel="nofollow" class="external text" href="http://www.doria.fi/bitstream/10024/91979/1/1201013808.jpg"> Original file.</a>