La projection cartographique de Lambert - NGI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La projection cartographique de Lambert - NGI\" \/>\n<meta property=\"og:description\" content=\"La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. Conforme car cette projection ne d\u00e9forme pas les angles mesur\u00e9s mais bien les distances. De 1950 \u00e0 nos jours, l\u2019Institut g\u00e9ographique national a propos\u00e9 trois projections Lambert successives comme projections cartographiques officielles. Les param\u00e8tres ont chaque fois \u00e9t\u00e9 choisis de mani\u00e8re \u00e0 r\u00e9duire autant que possible la...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\" \/>\n<meta property=\"og:site_name\" content=\"NGI\" \/>\n<meta property=\"article:modified_time\" content=\"2020-04-23T12:37:39+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\",\"url\":\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\",\"name\":\"La projection cartographique de Lambert - NGI\",\"isPartOf\":{\"@id\":\"https:\/\/ngibe.webhosting.be\/#website\"},\"datePublished\":\"2020-04-10T12:55:05+00:00\",\"dateModified\":\"2020-04-23T12:37:39+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ngibe.webhosting.be\/fr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"La projection cartographique de Lambert\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/ngibe.webhosting.be\/#website\",\"url\":\"https:\/\/ngibe.webhosting.be\/\",\"name\":\"NGI\",\"description\":\"Cartes topographiques et bases de donn\u00e9es, photos a\u00e9riennes\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/ngibe.webhosting.be\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n","yoast_head_json":{"title":"La projection cartographique de Lambert - NGI","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/","og_locale":"fr_FR","og_type":"article","og_title":"La projection cartographique de Lambert - NGI","og_description":"La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. 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{"id":2627,"date":"2020-04-10T14:55:05","date_gmt":"2020-04-10T12:55:05","guid":{"rendered":"https:\/\/www.ngi.be\/website\/?page_id=2627"},"modified":"2020-04-23T14:37:39","modified_gmt":"2020-04-23T12:37:39","slug":"la-projection-cartographique-de-lambert","status":"publish","type":"page","link":"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/","title":{"rendered":"La projection cartographique de Lambert"},"content":{"rendered":"

La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. Conforme car cette projection ne d\u00e9forme pas les angles mesur\u00e9s mais bien les distances.<\/p>\n

De 1950 \u00e0 nos jours, l\u2019Institut g\u00e9ographique national a propos\u00e9 trois projections Lambert successives comme projections cartographiques officielles. Les param\u00e8tres ont chaque fois \u00e9t\u00e9 choisis de mani\u00e8re \u00e0 r\u00e9duire autant que possible la d\u00e9formation des distances (max. 8 cm\/km).<\/p>\n

LB50 : a succ\u00e9d\u00e9 \u00e0 la projection de Bonne utilis\u00e9e jusqu\u2019alors.<\/li>\n
LB72 : a am\u00e9lior\u00e9 la pr\u00e9cision par rapport \u00e0 LB50 en se fondant sur 2 d\u00e9cennies de mesures g\u00e9od\u00e9siques.<\/li>\n

LB08 : est bas\u00e9e sur l\u2019ellipso\u00efde GRS80 comme le GNSS. Cela permet d\u2019\u00e9viter des calculs complexes de transformation de coordonn\u00e9es et les pertes de pr\u00e9cision qu\u2019ils impliquent pour les coordonn\u00e9es re\u00e7ues via GNSS.<\/li>\n<\/ul>\n

Les param\u00e8tres fondamentaux de LB72 et LB08 sont :<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n <\/td>\n Projection Lambert 1972 <\/strong><\/td>\n Projection Lambert 2008 <\/strong><\/td>\n<\/tr>\n
Ellipso\u00efde<\/td>\n Nom<\/td>\n Hayford 1924<\/td>\n GRS80<\/td>\n<\/tr>\n
\u00bd grand axe (a)<\/td>\n 6.378.388,0 m<\/td>\n 6 378 137,0 m<\/td>\n<\/tr>\n
Aplatissement (f)<\/td>\n 1 \/ 297,0<\/td>\n 1\/298,257222101<\/td>\n<\/tr>\n
Parall\u00e8les standard<\/td>\n \u03c61<\/td>\n 49\u00b0 50\u2019 00\u201d 00204 N<\/td>\n 49\u00b0 50\u2032 N<\/td>\n<\/tr>\n
\u03c62<\/td>\n 51\u00b0 10\u2019 00\u201d 00204 N<\/td>\n 51\u00b0 10\u2032 N<\/td>\n<\/tr>\n
Origine<\/td>\n Latitude origine<\/td>\n 90\u00b0<\/td>\n 50\u00b0 47\u2032 52\u201d 134 N<\/td>\n<\/tr>\n
M\u00e9ridien central<\/td>\n 4\u00b0 22\u2019 02\u201d 952 E<\/td>\n 4\u00b0 21\u2032 33\u201d 177 E<\/td>\n<\/tr>\n
Coordonn\u00e9es de l\u2019origine<\/td>\n x_{0<\/sub><\/td>\n} 150.000,013 m<\/td>\n 649 328,0 m<\/td>\n<\/tr>\n
y_{0<\/sub><\/td>\n} 5.400.088,438 m<\/td>\n 665 262,0 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. Conforme car cette projection ne d\u00e9forme pas les angles mesur\u00e9s mais bien les distances. De 1950 \u00e0 nos jours, l\u2019Institut g\u00e9ographique national a propos\u00e9 trois projections Lambert successives comme projections cartographiques officielles. Les param\u00e8tres ont chaque fois \u00e9t\u00e9 choisis de mani\u00e8re \u00e0 r\u00e9duire autant que possible la…<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":147,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"acf":[],"yoast_head":"\nLa projection cartographique de Lambert - NGI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La projection cartographique de Lambert - NGI\" \/>\n<meta property=\"og:description\" content=\"La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. Conforme car cette projection ne d\u00e9forme pas les angles mesur\u00e9s mais bien les distances. De 1950 \u00e0 nos jours, l\u2019Institut g\u00e9ographique national a propos\u00e9 trois projections Lambert successives comme projections cartographiques officielles. 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<\/td>\n	<\/td>\n	Projection Lambert 1972 <\/strong><\/td>\n	Projection Lambert 2008 <\/strong><\/td>\n<\/tr>\n
Ellipso\u00efde<\/td>\n	Nom<\/td>\n	Hayford 1924<\/td>\n	GRS80<\/td>\n<\/tr>\n
\u00bd grand axe (a)<\/td>\n	6.378.388,0 m<\/td>\n	6 378 137,0 m<\/td>\n<\/tr>\n
Aplatissement (f)<\/td>\n	1 \/ 297,0<\/td>\n	1\/298,257222101<\/td>\n<\/tr>\n
Parall\u00e8les standard<\/td>\n	\u03c61<\/td>\n	49\u00b0 50\u2019 00\u201d 00204 N<\/td>\n	49\u00b0 50\u2032 N<\/td>\n<\/tr>\n
\u03c62<\/td>\n	51\u00b0 10\u2019 00\u201d 00204 N<\/td>\n	51\u00b0 10\u2032 N<\/td>\n<\/tr>\n
Origine<\/td>\n	Latitude origine<\/td>\n	90\u00b0<\/td>\n	50\u00b0 47\u2032 52\u201d 134 N<\/td>\n<\/tr>\n
M\u00e9ridien central<\/td>\n	4\u00b0 22\u2019 02\u201d 952 E<\/td>\n	4\u00b0 21\u2032 33\u201d 177 E<\/td>\n<\/tr>\n
Coordonn\u00e9es de l\u2019origine<\/td>\n	x_{0<\/sub><\/td>\n}	150.000,013 m<\/td>\n	649 328,0 m<\/td>\n<\/tr>\n
y_{0<\/sub><\/td>\n}	5.400.088,438 m<\/td>\n	665 262,0 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":" La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. Conforme car cette projection ne d\u00e9forme pas les angles mesur\u00e9s mais bien les distances. De 1950 \u00e0 nos jours, l\u2019Institut g\u00e9ographique national a propos\u00e9 trois projections Lambert successives comme projections cartographiques officielles. Les param\u00e8tres ont chaque fois \u00e9t\u00e9 choisis de mani\u00e8re \u00e0 r\u00e9duire autant que possible la…<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":147,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"acf":[],"yoast_head":"\nLa projection cartographique de Lambert - NGI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ngibe.webhosting.be\/fr\/la-projection-cartographique-de-lambert\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La projection cartographique de Lambert - NGI\" \/>\n<meta property=\"og:description\" content=\"La projection cartographique Lambert est dite \u00ab\u00a0conique conforme\u00a0\u00bb. 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