{"id":40184,"date":"2025-04-21T00:27:14","date_gmt":"2025-04-21T00:27:14","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/40184\/"},"modified":"2025-04-21T00:27:14","modified_gmt":"2025-04-21T00:27:14","slug":"insolite-pourquoi-lalsace-a-change-trois-fois-daltitude-en-un-siecle","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/40184\/","title":{"rendered":"Insolite. Pourquoi l&rsquo;Alsace a chang\u00e9 trois fois d&rsquo;altitude en un si\u00e8cle"},"content":{"rendered":"<p>                    Entre Amsterdam et Marseille, l\u2019Alsace balance<\/p>\n<p>Lorsqu\u2019elles ont \u00e9t\u00e9 c\u00e9d\u00e9es \u00e0 l\u2019Empire allemand par la France en 1871, l\u2019Alsace et la Moselle n\u2019ont pas seulement chang\u00e9 de nationalit\u00e9 ; elles ont aussi perdu de l\u2019altitude. Vingt centim\u00e8tres. Ce n\u2019est pas grand-chose, certes, mais cette donn\u00e9e vient s\u2019ajouter aux particularit\u00e9s locales qui ont \u00e9merg\u00e9 entre 1871 et 1919.<\/p>\n<p>Cette disparit\u00e9 s\u2019explique par le fait que, durant cette p\u00e9riode, les deux pays avaient des r\u00e9f\u00e9rences altim\u00e9triques diff\u00e9rentes : en Allemagne, le niveau z\u00e9ro \u2013 appel\u00e9 Normalnull  ou  Normalh\u00f6hepunkt 1879  \u2013 est d\u00e9termin\u00e9 par le niveau de la mer du Nord, \u00e0 Amsterdam (Pays-Bas), tandis qu\u2019en France, le niveau z\u00e9ro est d\u00e9fini par le niveau moyen de la M\u00e9diterran\u00e9e, \u00e0 Marseille.<\/p>\n<p>Des rep\u00e8res allemands toujours visibles<\/p>\n<p>Des rep\u00e8res de nivellement de cette \u00e9poque sont toujours en place, essentiellement dans l\u2019agglom\u00e9ration strasbourgeoise. Il s\u2019agit de plaques m\u00e9talliques \u2013  H\u00f6henmark e \u2013 fix\u00e9es sur les soubassements des fa\u00e7ades&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"Entre Amsterdam et Marseille, l\u2019Alsace balance Lorsqu\u2019elles ont \u00e9t\u00e9 c\u00e9d\u00e9es \u00e0 l\u2019Empire allemand par la France en 1871,&hellip;\n","protected":false},"author":2,"featured_media":40185,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2820],"tags":[1111,11,2389,7782,1687,436,1777,674,107,1011,27,5325,2798,775,1757,3035,12,25,104,640],"class_list":{"0":"post-40184","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-strasbourg","8":"tag-actu","9":"tag-actualites","10":"tag-alsace","11":"tag-balades-et-randonnees","12":"tag-culture-loisirs","13":"tag-environnement","14":"tag-eu","15":"tag-europe","16":"tag-fil-info","17":"tag-fr","18":"tag-france","19":"tag-galerie-media","20":"tag-galerie-photo","21":"tag-grand-est","22":"tag-insolite","23":"tag-la-matinale-strasbourg","24":"tag-news","25":"tag-republique-francaise","26":"tag-societe","27":"tag-strasbourg"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fr\/114373122290825795","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/40184","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/comments?post=40184"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/40184\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media\/40185"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media?parent=40184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/categories?post=40184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/tags?post=40184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}