The mathematician <a href="https://en.wikipedia.org/wiki/Johannes_Mejer" class="extiw" title="en:Johannes Mejer">Johannes Mejer</a> (1606-1674) prepared, ordered by the king of Denmark, between 1638 and 1648 a map of Schleswig and Holstein, at the time Danish territory. The results of this survey - an atlas with 40 detailed maps, engraved by the goldsmiths Matthias and Nicolaus Petersen - was published in 1652 by Caspar Dankwerth (c. 1615-1672). Via Dankwerth <a href="https://en.wikipedia.org/wiki/Joan_Blaeu" class="extiw" title="en:Joan Blaeu">Joan Blaeu</a> (1598-1673) could purchase the copper plates of this atlas. He used 34 of the copper plates for his world atlas, the <a href="https://en.wikipedia.org/wiki/Atlas_Maior" class="extiw" title="en:Atlas Maior">Atlas Maior</a> (1662).
<bdi><a href="https://en.wikipedia.org/wiki/en:Joan_Blaeu" class="extiw" title="w:en:Joan Blaeu"><span title="Dutch cartographer (1596-1673)">Joan Blaeu</span></a>
</bdi>
1662<div style="display: none;">date QS:P571,+1662-00-00T00:00:00Z/9</div>
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