The Danish mathematician <a href="https://en.wikipedia.org/wiki/Johannes_Mejer" class="extiw" title="en:Johannes Mejer">Johannes Mejer</a> (1606-1674) had been working from 1638 on a composition of a map of Schleswig-Holstein, at that time mostly on Danish territory. The results of that work - an atlas with 43 detailed maps about Schleswig-Holstein - was published in 1652 by Caspar Dankwerth. Because the topographical survey of Schleswig-Holstein was one of the best of its time, <a href="https://en.wikipedia.org/wiki/Joan_Blaeu" class="extiw" title="en:Joan Blaeu">Joan Blaeu</a> (1598-1673) used these important maps in his <a href="https://en.wikipedia.org/wiki/Atlas_Maior" class="extiw" title="en:Atlas Maior">Atlas Maior</a> in 1662. Years later the maps were still very popular. This version of the map of Schleswig-Holstein was produced by <a href="https://en.wikipedia.org/wiki/Frederik_de_Wit" class="extiw" title="en:Frederik de Wit">Frederik de Wit</a> (1630-1706).
<bdi><a href="https://en.wikipedia.org/wiki/en:Frederik_de_Wit" class="extiw" title="w:en:Frederik de Wit"><span title="Dutch map maker (1629/1630-1706)">Frederik de Wit</span></a>
</bdi>
after 1688 <div style="display: none;">date QS:P571,+1688-00-00T00:00:00Z/7,P1319,+1688-00-00T00:00:00Z/9</div>
This digital media file - and/or the physical objects depicted on it - originates from the digital and/or physical collections of the <a rel="nofollow" class="external text" href="https://www.kb.nl/">Koninklijke Bibliotheek</a>, national library of the Netherlands.