{"id":18,"date":"2018-12-04T16:48:39","date_gmt":"2018-12-04T15:48:39","guid":{"rendered":"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/?page_id=18"},"modified":"2021-10-06T13:46:17","modified_gmt":"2021-10-06T12:46:17","slug":"outils","status":"publish","type":"page","link":"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/outils\/","title":{"rendered":"Outils utilis\u00e9s"},"content":{"rendered":"<h3><strong><span style=\"color: #339966\">Vertex\u00a0: outil permettant de mesurer la hauteur des arbres<\/span><\/strong><\/h3>\n<p><a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47386108_1025293940988964_6929477137032282112_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-60\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47386108_1025293940988964_6929477137032282112_n-300x200.jpg\" alt=\"47386108_1025293940988964_6929477137032282112_n\" width=\"327\" height=\"218\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47386108_1025293940988964_6929477137032282112_n-300x200.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47386108_1025293940988964_6929477137032282112_n.jpg 421w\" sizes=\"(max-width: 327px) 100vw, 327px\" \/><\/a> <a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47024083_185573122394686_4166184823343284224_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-56\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47024083_185573122394686_4166184823343284224_n-225x300.jpg\" alt=\"47024083_185573122394686_4166184823343284224_n\" width=\"163\" height=\"218\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47024083_185573122394686_4166184823343284224_n-225x300.jpg 225w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47024083_185573122394686_4166184823343284224_n-768x1024.jpg 768w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47024083_185573122394686_4166184823343284224_n.jpg 1536w\" sizes=\"(max-width: 163px) 100vw, 163px\" \/><\/a><\/p>\n<p style=\"text-align: justify\">Le vertex est divis\u00e9 en deux parties\u00a0:<\/p>\n<ul style=\"text-align: justify\">\n<li>le transpondeur (\u00e9metteur d\u2019ultrason, plac\u00e9 sur le tronc \u00e0 1m30 du sol)<\/li>\n<li>le dendrom\u00e8tre (r\u00e9cepteur d\u2019ultrason, r\u00e9alise les calculs de hauteurs)<\/li>\n<\/ul>\n<p style=\"text-align: justify\">L\u2019op\u00e9rateur charg\u00e9 de mesurer les hauteurs des arbres pointe successivement le dendrom\u00e8tre vers le transpondeur et vers la cime (sommet) de l\u2019arbre. La hauteur est alors calcul\u00e9e via un principe trigonom\u00e9trique ce basant sur la distance entre le dendrom\u00e8tre et le transpondeur et les diff\u00e9rents angles qui sont form\u00e9s.<\/p>\n<hr \/>\n<h3><strong><span style=\"color: #339966\">M\u00e8tre ruban\u00a0: outil permettant de mesurer la grosseur des arbres<\/span><\/strong><\/h3>\n<p style=\"text-align: left\"><strong>\u00a0<a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47572885_346208076139240_5397364579158196224_n1.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-66\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47572885_346208076139240_5397364579158196224_n1-200x300.jpg\" alt=\"47572885_346208076139240_5397364579158196224_n\" width=\"166\" height=\"249\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47572885_346208076139240_5397364579158196224_n1-200x300.jpg 200w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47572885_346208076139240_5397364579158196224_n1.jpg 280w\" sizes=\"(max-width: 166px) 100vw, 166px\" \/><\/a> <a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-57\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n-300x225.jpg\" alt=\"47044363_563210827480105_2230815565549666304_n\" width=\"332\" height=\"249\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n-300x225.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n-800x600.jpg 800w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n-1024x768.jpg 1024w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47044363_563210827480105_2230815565549666304_n.jpg 2048w\" sizes=\"(max-width: 332px) 100vw, 332px\" \/><\/a><\/strong><\/p>\n<p style=\"text-align: left\">La grosseur des arbres est d\u00e9termin\u00e9e en mesurant la circonf\u00e9rence \u00e0 1m 50 du sol. Pour ce faire, il suffit de faire le tour de l\u2019arbre avec le ruban en veillant \u00e0 ce que celui-ci soit bien droit.<\/p>\n<hr \/>\n<h3><strong><span style=\"color: #339966\">GPS de pr\u00e9cision\u00a0: outil permettant de localiser les arbres avec une pr\u00e9cision de quelques centim\u00e8tres<\/span><\/strong><\/h3>\n<p style=\"text-align: justify\"><a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/photo3.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-62\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/photo3-169x300.jpg\" alt=\"photo3\" width=\"156\" height=\"277\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/photo3-169x300.jpg 169w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/photo3-576x1024.jpg 576w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/photo3.jpg 719w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/><\/a> <a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47423846_1124190594422421_4139236781188972544_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-64\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47423846_1124190594422421_4139236781188972544_n-199x300.jpg\" alt=\"47423846_1124190594422421_4139236781188972544_n\" width=\"184\" height=\"277\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47423846_1124190594422421_4139236781188972544_n-199x300.jpg 199w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47423846_1124190594422421_4139236781188972544_n.jpg 637w\" sizes=\"(max-width: 184px) 100vw, 184px\" \/><\/a><\/p>\n<p style=\"text-align: justify\">M\u00eames principes que les autres GPS, le GPS de pr\u00e9cision se caract\u00e9rise par l\u2019erreur qui lui est associ\u00e9e. Cette erreur est de l\u2019ordre d\u2019une dizaine de m\u00e8tres pour un GPS standard, et de quelques centim\u00e8tres pour ceux de pr\u00e9cision lorsqu\u2019il y a une bonne r\u00e9ception des satellites. La pr\u00e9sence de b\u00e2timents bloque la r\u00e9ception des signaux. Pour obtenir une\u00a0 meilleure pr\u00e9cision, la pointe du mat du GPS est plac\u00e9e au pied de l\u2019arbre. L\u2019op\u00e9rateur garde celui-ci fixe jusqu\u2019\u00e0 ce que le GPS ait enregistr\u00e9 la position exacte. L\u2019op\u00e9rateur doit alors encoder le num\u00e9ro de l\u2019arbre dans l\u2019appareil.<\/p>\n<hr \/>\n<h3><strong><span style=\"color: #339966\">Lidar sur drone\u00a0: outil multifonction permettant de r\u00e9colter un nuage de point de la zone survol\u00e9e dans le but de r\u00e9aliser une reconstitution 3D<\/span><\/strong><\/h3>\n<p><a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47433514_2084227218287293_5327603435413962752_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-65\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47433514_2084227218287293_5327603435413962752_n-300x225.jpg\" alt=\"47433514_2084227218287293_5327603435413962752_n\" width=\"146\" height=\"109\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47433514_2084227218287293_5327603435413962752_n-300x225.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47433514_2084227218287293_5327603435413962752_n-800x600.jpg 800w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47433514_2084227218287293_5327603435413962752_n.jpg 960w\" sizes=\"(max-width: 146px) 100vw, 146px\" \/><\/a>\u00a0<a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47680118_2227932203926227_5581335229789896704_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-70\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47680118_2227932203926227_5581335229789896704_n-300x199.jpg\" alt=\"47680118_2227932203926227_5581335229789896704_n\" width=\"165\" height=\"109\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47680118_2227932203926227_5581335229789896704_n-300x199.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47680118_2227932203926227_5581335229789896704_n-1024x680.jpg 1024w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47680118_2227932203926227_5581335229789896704_n.jpg 2048w\" sizes=\"(max-width: 165px) 100vw, 165px\" \/><\/a> <a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47169751_343058509605838_5619536893713580032_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-71\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47169751_343058509605838_5619536893713580032_n-300x199.jpg\" alt=\"47169751_343058509605838_5619536893713580032_n\" width=\"163\" height=\"108\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47169751_343058509605838_5619536893713580032_n-300x199.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47169751_343058509605838_5619536893713580032_n-1024x680.jpg 1024w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47169751_343058509605838_5619536893713580032_n.jpg 2048w\" sizes=\"(max-width: 163px) 100vw, 163px\" \/><\/a> <a href=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47577157_517427705422089_6330704119820451840_n.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-68\" style=\"border: 2px;border-style: solid;border-color: #088A29\" src=\"http:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47577157_517427705422089_6330704119820451840_n-300x199.jpg\" alt=\"47577157_517427705422089_6330704119820451840_n\" width=\"163\" height=\"108\" srcset=\"https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47577157_517427705422089_6330704119820451840_n-300x199.jpg 300w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47577157_517427705422089_6330704119820451840_n-1024x680.jpg 1024w, https:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/wp-content\/uploads\/sites\/64\/2018\/12\/47577157_517427705422089_6330704119820451840_n.jpg 2048w\" sizes=\"(max-width: 163px) 100vw, 163px\" \/><\/a><\/p>\n<p style=\"text-align: justify\">Un module lidar est mont\u00e9 sur le drone, celui-ci envoie \u00e0 tr\u00e8s hautes fr\u00e9quences des rayons lasers. Ceux-ci vont alors se r\u00e9fl\u00e9chir sur les objets au sol et revenir vers le r\u00e9cepteur. Comme la vitesse de la lumi\u00e8re, le temps de retour sont connus, la distance s\u00e9parant l\u2019objet du drone est ainsi calculable. On obtient un nuage de points avec pour chaque point des coordonn\u00e9es en 3 dimensions. Gr\u00e2ce \u00e0 l\u2019ensemble de ces points plusieurs applications sont possibles\u00a0: calcule de la hauteur des objets (arbres, b\u00e2timents\u2026), reconstitution 3D&#8230;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vertex\u00a0: outil permettant de mesurer la hauteur des arbres Le vertex est divis\u00e9 en deux parties\u00a0: le transpondeur (\u00e9metteur d\u2019ultrason,  [&#8230;]<\/p>\n","protected":false},"author":70,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-18","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Outils utilis\u00e9s - Arboretum de Gembloux Agro BioTech<\/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:\/\/www.gembloux.ulg.ac.be\/arboretumgembloux\/outils\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Outils utilis\u00e9s - 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