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<span id="openzim-page-title" class="mw-page-title-main"><span title="German-language text"><i lang="de">Normalnull</i></span></span>
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<p><b><span title="German-language text"><i lang="de">Normalnull</i></span></b> ("standard zero") or <b><span title="German-language text"><i lang="de">Normal-Null</i></span></b> (short <b>N. N.</b> or <b>NN</b>) is an outdated official <a href="Vertical_datum" title="Vertical datum">vertical datum</a> used in Germany. Elevations using this reference system were to be marked <span title="German-language text"><i lang="de">Meter über Normal-Null</i></span> (“meters above standard zero”). <span title="German-language text"><i lang="de">Normalnull</i></span> has been replaced by <span title="German-language text"><i lang="de"><a href="Normalh%C3%B6hennull" title="Normalhöhennull">Normalhöhennull</a></i></span> (NHN).
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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>
<p>In 1878 reference heights were taken from the <a href="Amsterdam_Ordnance_Datum" title="Amsterdam Ordnance Datum">Amsterdam Ordnance Datum</a> and transferred to the <a href="Berlin_Observatory#New_Berlin_Observatory" title="Berlin Observatory">New Berlin Observatory</a> in order to define the <span title="German-language text"><i lang="de">Normalhöhenpunkt</i></span> 1879. <span title="German-language text"><i lang="de">Normalnull</i></span> has been defined as a level going through an imaginary point 37.000 m below <span title="German-language text"><i lang="de">Normalhöhenpunkt 1879</i></span>. When the New Berlin Observatory was demolished in 1912 the reference point was moved east to the village of <a href="Hoppegarten" title="Hoppegarten"><span title="German-language text"><span lang="de">Hoppegarten</span></span></a> (now part of the town of <a href="M%C3%BCncheberg" title="Müncheberg"><span title="German-language text"><i lang="de">Müncheberg</i></span></a>, Brandenburg, Germany).<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><span title="German-language text"><span lang="de">S. German</span></span>: <span title="German-language text"><i lang="de">Was ist "Normal-Null"?</i></span>. In: <i><span title="German-language text"><i lang="de">Physikalische Blätter</i></span></i> 1958, vol 14, issue 2, p. 62–66 <style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><a href="ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1521-3722">1521-3722</a> <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fphbl.19580140203">10.1002/phbl.19580140203</a></span>
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This article is issued from <a class="external text" title="Last edited on 2025-03-30" href="https://en.wikipedia.org/wiki/?title=Normalnull&oldid=1283066416">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
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