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href="#Dansk_Normalnul_GradMåling,_DNNGM"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Dansk Normalnul GradMåling, DNNGM</span> </div> </a> <ul id="toc-Dansk_Normalnul_GradMåling,_DNNGM-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Dansk_Normalnul_Geodætisk_Institut,_DNNGI" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Dansk_Normalnul_Geodætisk_Institut,_DNNGI"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Dansk Normalnul Geodætisk Institut, DNNGI</span> </div> </a> <ul id="toc-Dansk_Normalnul_Geodætisk_Institut,_DNNGI-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Københavns_nul_KN" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Københavns_nul_KN"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Københavns nul KN</span> </div> </a> <ul id="toc-Københavns_nul_KN-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mindre_øer" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mindre_øer"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Mindre øer</span> </div> </a> <ul id="toc-Mindre_øer-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kilder_og_ekstene_henvisninger" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kilder_og_ekstene_henvisninger"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Kilder og ekstene henvisninger</span> </div> </a> <ul id="toc-Kilder_og_ekstene_henvisninger-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indholdsfortegnelse" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul indholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul indholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Dansk Normalnul</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Denne artikel findes kun på dette sprog. 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data-event-name="pinnable-header.vector-page-tools.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">skjul</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Flere muligheder" > <div class="vector-menu-heading"> Handlinger </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Dansk_Normalnul"><span>Læs</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit" title="Redigér denne side [v]" accesskey="v"><span>Redigér</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Dansk_Normalnul&action=edit" title="Rediger kildekoden for denne side [e]" accesskey="e"><span>Rediger kildekode</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Dansk_Normalnul&action=history"><span>Se historik</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generelt </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciel:Hvad_linker_hertil/Dansk_Normalnul" title="Liste med alle sider som henviser hertil [j]" accesskey="j"><span>Hvad henviser hertil</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciel:Relaterede_%C3%A6ndringer/Dansk_Normalnul" rel="nofollow" title="Seneste ændringer af sider som denne side henviser til [k]" accesskey="k"><span>Beslægtede ændringer</span></a></li><li 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class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speciel:Bog&bookcmd=book_creator&referer=Dansk+Normalnul"><span>Lav en bog</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciel:DownloadAsPdf&page=Dansk_Normalnul&action=show-download-screen"><span>Download som PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Dansk_Normalnul&printable=yes" title="Printervenlig udgave af denne side [p]" accesskey="p"><span>Udskriftsvenlig udgave</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> I andre projekter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q12306913" title="Link til tilknyttet emne i Wikidata [g]" accesskey="g"><span>Wikidata-element</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sideværktøjer"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Udseende"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Udseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Fra Wikipedia, den frie encyklopædi</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Omdirigeret fra <a href="/w/index.php?title=DNN&redirect=no" class="mw-redirect" title="DNN">DNN</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="da" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/57/Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg/220px-Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg" decoding="async" width="220" height="337" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/57/Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg/330px-Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/57/Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg/440px-Den_Danske_GradM%C3%A5ling_Pr%C3%A6cisionsnivellement.jpg 2x" data-file-width="3683" data-file-height="5647" /></a><figcaption>Den Danske GradMåling Præcisionsnivellement i den østlige ende af <a href="/wiki/Aarhus_Domkirke" title="Aarhus Domkirke">Aarhus Domkirke</a>. Pladen er opsat på ydervæggen af <a href="/wiki/Apsis" title="Apsis">apsis</a>.</figcaption></figure> <p><b>Dansk Normal Nul</b>, <b>DNN</b>, angiver <a href="/wiki/Havoverflade" title="Havoverflade">havoverfladens</a> gennemsnitlige niveau i Danmark. Det er nulpunkt for angivelse af <a href="/wiki/Kote" title="Kote">koten</a> for bestemte terrænpunkter, eksempelvis koten for en <a href="/wiki/S%C3%B8" title="Sø">søbred</a>. For eksempel er vandspejlskoten for <a href="/wiki/Fures%C3%B8" title="Furesø">Furesø</a> 20,5 meter over DNN. </p><p>DNN er i dag erstattet af Dansk Vertikal Reference 1990, <a href="/wiki/DVR90" title="DVR90">DVR90</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Dansk_Normalnul_GradMåling,_DNNGM"><span id="Dansk_Normalnul_GradM.C3.A5ling.2C_DNNGM"></span>Dansk Normalnul GradMåling, DNNGM</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit&section=1" title="Redigér afsnit: Dansk Normalnul GradMåling, DNNGM" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dansk_Normalnul&action=edit&section=1" title="Edit section's source code: Dansk Normalnul GradMåling, DNNGM"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I årene 1885-1905 gennemførte <a href="/wiki/Den_danske_Gradmaaling" title="Den danske Gradmaaling">Den danske Gradmaaling</a> et præcisions<a href="/w/index.php?title=Nivellement&action=edit&redlink=1" class="new" title="Nivellement (ikke skrevet endnu)">nivellement</a> langs de vigtigste hovedveje i <a href="/wiki/Danmark" title="Danmark">Danmark</a>. Præcisionsnivellementet blev sat i forbindelse med <a href="/wiki/Meteorologisk_Institut" class="mw-redirect" title="Meteorologisk Institut">Meteorologisk Instituts</a> vandstandsmålere 10 steder i landet. Ud fra nivellementet og vandstandsregistreringerne fastlagde man Dansk Normalnul for Danmark, kaldet DNNGM. Niveauet er repræsenteret ved en kote til normalhøjdepunktet i Århus Domkirkes østlige ende på 5,6150 m. </p> <div class="mw-heading mw-heading2"><h2 id="Dansk_Normalnul_Geodætisk_Institut,_DNNGI"><span id="Dansk_Normalnul_Geod.C3.A6tisk_Institut.2C_DNNGI"></span>Dansk Normalnul Geodætisk Institut, DNNGI</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit&section=2" title="Redigér afsnit: Dansk Normalnul Geodætisk Institut, DNNGI" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dansk_Normalnul&action=edit&section=2" title="Edit section's source code: Dansk Normalnul Geodætisk Institut, DNNGI"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Da Danmark vipper ved at <a href="/wiki/Skagen" title="Skagen">Skagen</a> hæver sig og <a href="/wiki/S%C3%B8nderjylland" title="Sønderjylland">Sønderjylland</a> synker, ændres Normalnul hele tiden. Fra 1940 til 1953 foretog <a href="/wiki/Geod%C3%A6tisk_Institut" title="Geodætisk Institut">Geodætisk Institut</a> derfor et nyt landsdækkende præcisionsnivellement. Dette nivellement blev ikke knyttet til vandstandsmålinger, men man valgte at fastholde Normalhøjdepunktets kote på 5,6150 m, dette præcisionsnivellement kaldes DNNGI. Dette dækker de større øer, men bruges ikke i <a href="/wiki/Jylland" title="Jylland">Jylland</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Københavns_nul_KN"><span id="K.C3.B8benhavns_nul_KN"></span>Københavns nul KN</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit&section=3" title="Redigér afsnit: Københavns nul KN" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dansk_Normalnul&action=edit&section=3" title="Edit section's source code: Københavns nul KN"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Københavns nul, KN, er ældre end både DNNGM og DNNGI, idet det første nulniveau for <a href="/wiki/K%C3%B8benhavn" title="København">København</a> blev defineret ud fra vandstandsmålinger i perioden 1817-1832. Dette blev revideret sidst i 1977. </p> <div class="mw-heading mw-heading2"><h2 id="Mindre_øer"><span id="Mindre_.C3.B8er"></span>Mindre øer</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit&section=4" title="Redigér afsnit: Mindre øer" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dansk_Normalnul&action=edit&section=4" title="Edit section's source code: Mindre øer"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Lokalt på mindre øer er nulniveauet fastlagt ved hjælp af vandstandsmålinger over en kortere periode. </p> <div class="mw-heading mw-heading2"><h2 id="Kilder_og_ekstene_henvisninger">Kilder og ekstene henvisninger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dansk_Normalnul&veaction=edit&section=5" title="Redigér afsnit: Kilder og ekstene henvisninger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dansk_Normalnul&action=edit&section=5" title="Edit section's source code: Kilder og ekstene henvisninger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://archive.today/20140305121046/http://www.gst.dk/emner/referencenet,-hoejdemodel-opmaaling/referencesystemer/dnn/#selection-680.1-689.23/">DNN</a> archive.is</li> <li><a rel="nofollow" class="external text" href="http://sdfe.dk/data-og-infrastruktur/data-om-land-danmark-faeroeerne-og-groenland/referencenet-og-geodaesi/nationale-referencenet-i-danmark-og-groenland/">Referencenet i Danmark og Grønland</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160811025022/http://sdfe.dk/data-og-infrastruktur/data-om-land-danmark-faeroeerne-og-groenland/referencenet-og-geodaesi/nationale-referencenet-i-danmark-og-groenland/">Arkiveret</a> 11. august 2016 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Hentet fra "<a dir="ltr" href="https://da.wikipedia.org/w/index.php?title=Dansk_Normalnul&oldid=11138419">https://da.wikipedia.org/w/index.php?title=Dansk_Normalnul&oldid=11138419</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Speciel:Kategorier" title="Speciel:Kategorier">Kategorier</a>: <ul><li><a href="/wiki/Kategori:Landm%C3%A5ling" title="Kategori:Landmåling">Landmåling</a></li><li><a href="/wiki/Kategori:Danmarks_geografi" title="Kategori:Danmarks geografi">Danmarks geografi</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Skjult kategori: <ul><li><a href="/wiki/Kategori:Sider_med_Webarchive-skabelon_som_henviser_til_Wayback_Machine" title="Kategori:Sider med Webarchive-skabelon som henviser til Wayback Machine">Sider med Webarchive-skabelon som henviser til Wayback Machine</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Denne side blev senest ændret den 6. maj 2022 kl. 06:25.</li> <li id="footer-info-copyright">Tekst er tilgængelig under <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/deed.da">Creative Commons Navngivelse/Del på samme vilkår 4.0</a>; yderligere betingelser kan være gældende. 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