{"id":2340,"date":"2021-06-25T10:09:37","date_gmt":"2021-06-25T10:09:37","guid":{"rendered":"http:\/\/meumon.synology.me\/museu\/?p=2340"},"modified":"2022-10-26T10:34:53","modified_gmt":"2022-10-26T10:34:53","slug":"geodesia","status":"publish","type":"post","link":"http:\/\/meumon.synology.me\/museu\/geodesia\/","title":{"rendered":"Geod\u00e8sia"},"content":{"rendered":"<p><a href=\"http:\/\/meumon.synology.me\/museu\/lexploracio-del-mon\/\">Exploraci\u00f3 del m\u00f3n\u00a0<\/a> | \u00a0 <a href=\"http:\/\/meumon.synology.me\/museu\/4-inventari-tot\/42-cultura\/425-tecnologia\/425-cartografia\/\">Cartografia<\/a><\/p>\n<hr \/>\n<p>1672 Jean Richer troba que un rellotge de p\u00e8ndol a la Guaiana francesa endarerreix 2&#8217;30&#8221; cada dia respecte de Paris, un indici que la gravetat no \u00e9s igual a tot arreu. En realitat la terra \u00e9s un el\u00b7lipsoide m\u00e9s allargat als pols, on la gravetat \u00e9s un 0.5% m\u00e9s gran.<\/p>\n<p>Per determinar-ho es van dur a terme mesures per <a href=\"http:\/\/meumon.synology.me\/museu\/triangulacio\/\">triangulaci\u00f3<\/a> de diferents arcs de meridi\u00e0:<\/p>\n<ul>\n<li>1670 Jean Picard mesura un grau d&#8217;arc de meridi\u00e0 que d\u00f3na 110.46 km<\/li>\n<li>1735 Expedici\u00f3 al Per\u00fa per mesurar un arc de meridi\u00e0 a l&#8217;equador ( <a class=\"mw-redirect\" title=\"\" href=\"https:\/\/en.wikipedia.org\/wiki\/French_Geodesic_Mission\">French Geodesic Mission<\/a> )<\/li>\n<li>1735 Expedici\u00f3 a Lap\u00f2nia ( <a class=\"mw-redirect\" title=\"Torne Valley\" href=\"https:\/\/en.wikipedia.org\/wiki\/Torne_Valley\">Torne Valley<\/a> )<\/li>\n<li>1800 Delambre ha mesurat l&#8217;arc franc\u00e8s de Dunkirk al mediterr\u00e0 ( <a title=\"Meridian arc of Delambre and M\u00e9chain\" href=\"https:\/\/en.wikipedia.org\/wiki\/Meridian_arc_of_Delambre_and_M%C3%A9chain\">meridian arc of Delambre and M\u00e9chain<\/a>).<\/li>\n<\/ul>\n<p>La dist\u00e0ncia del pol a l&#8217;equador s&#8217;estima en <span class=\"nowrap\">5130762<\/span> <a title=\"Toise\" href=\"https:\/\/en.wikipedia.org\/wiki\/Toise\">toises<\/a> (aprox 2 metres, 6 peus) definides per un est\u00e0ndard a Paris. A partir d&#8217;aqui es defineix el metre com a 10M .[ en tractar-se d&#8217;un el\u00b7lipsoide la f\u00f3rmula de l&#8217;arc \u00e9s m\u00e9s complexa<\/p>\n<p>Una milla n\u00e0utica es defineix com l&#8217;arc d&#8217;un minut sobre una terra esf\u00e8ria, 1.852 metres.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Exploraci\u00f3 del m\u00f3n\u00a0 | \u00a0 Cartografia 1672 Jean Richer troba que un rellotge de p\u00e8ndol a la Guaiana francesa endarerreix 2&#8217;30&#8221; cada dia respecte de Paris, un indici que la gravetat no \u00e9s igual a tot arreu. En realitat la terra \u00e9s un el\u00b7lipsoide m\u00e9s allargat als pols, on la gravetat \u00e9s un 0.5% m\u00e9s &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/meumon.synology.me\/museu\/geodesia\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Geod\u00e8sia&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[173],"tags":[361],"anotacio":[],"civilitzacio":[],"spec":[],"aspecies":[],"Tema poesia":[],"_links":{"self":[{"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/posts\/2340"}],"collection":[{"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/comments?post=2340"}],"version-history":[{"count":0,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/posts\/2340\/revisions"}],"wp:attachment":[{"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/media?parent=2340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/categories?post=2340"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/tags?post=2340"},{"taxonomy":"anotacio","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/anotacio?post=2340"},{"taxonomy":"civilitzacio","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/civilitzacio?post=2340"},{"taxonomy":"spec","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/spec?post=2340"},{"taxonomy":"aspecies","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/aspecies?post=2340"},{"taxonomy":"Tema poesia","embeddable":true,"href":"http:\/\/meumon.synology.me\/museu\/wp-json\/wp\/v2\/Tema poesia?post=2340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}