﻿{"id":206,"date":"2015-02-08T08:14:08","date_gmt":"2015-02-08T07:14:08","guid":{"rendered":"http:\/\/www.sigterritoires.fr\/?p=206"},"modified":"2015-02-08T08:18:12","modified_gmt":"2015-02-08T07:18:12","slug":"comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt","status":"publish","type":"post","link":"https:\/\/www.sigterritoires.fr\/index.php\/comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt\/","title":{"rendered":"Comment extraire les hauteurs de terrain de Goggle Earth pour faire son propre MNT"},"content":{"rendered":"<p>Allez sur le site http:\/\/www.zonums.com\/gmaps\/terrain.php?action=sample<br \/>\nNe vous inqui\u00e9tez pas, c&rsquo;est absolument gratuit.<br \/>\n<a href=\"http:\/\/www.sigterritoires.fr\/?attachment_id=209\" rel=\"attachment wp-att-209\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"209\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt\/zonum1\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1.png?fit=733%2C539&amp;ssl=1\" data-orig-size=\"733,539\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"zonum1\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1.png?fit=630%2C463&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1-630x463.png?resize=630%2C463\" alt=\"\" title=\"zonum1\" width=\"630\" height=\"463\" class=\"aligncenter size-large wp-image-209\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1.png?resize=630%2C463&amp;ssl=1 630w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1.png?resize=300%2C220&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum1.png?w=733&amp;ssl=1 733w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/a><\/p>\n<p>Vous avez \u00e0 d\u00e9finir deux choses:<br \/>\n<strong>1- La m\u00e9thode \u00e9chantillonnage<\/strong><br \/>\nSoit vous souhaitez une grille r\u00e9guli\u00e8re, soit des points au hasard. Dans les deux cas, vous \u00eates limit\u00e9s \u00e0 5000 points en tout.<br \/>\n<strong>2- Les coordonn\u00e9es du cadre g\u00e9ographique<\/strong><br \/>\nEn d\u00e9pla\u00e7ant la souris sur la carte vous avez les coordonn\u00e9es qui s&rsquo;affichent dans le bandeau sup\u00e9rieur. Rentrez les coordonn\u00e9es du coin haut droit et bas gauche.<\/p>\n<p>Cliquez sur \u00ab\u00a0Get elevations\u00a0\u00bb puis choisissez si vous voulez voir s&rsquo;afficher les points au fur et \u00e0 mesure de leur capture. Pour une premi\u00e8re fois vous pouvez les afficher, mais ceci ralentit pas mal le processus.<br \/>\n<a href=\"http:\/\/www.sigterritoires.fr\/?attachment_id=213\" rel=\"attachment wp-att-213\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"213\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt\/zonum4\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4.png?fit=739%2C559&amp;ssl=1\" data-orig-size=\"739,559\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"zonum4\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4.png?fit=630%2C476&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4-630x476.png?resize=630%2C476\" alt=\"\" title=\"zonum4\" width=\"630\" height=\"476\" class=\"aligncenter size-large wp-image-213\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4.png?resize=630%2C476&amp;ssl=1 630w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4.png?resize=300%2C226&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum4.png?w=739&amp;ssl=1 739w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/a><br \/>\nA la fin du processus vous aurez une fen\u00eatre vous proposant d&rsquo;exporter les r\u00e9sultats.<br \/>\n<a href=\"http:\/\/www.sigterritoires.fr\/?attachment_id=210\" rel=\"attachment wp-att-210\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"210\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt\/zonum2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2.png?fit=741%2C574&amp;ssl=1\" data-orig-size=\"741,574\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"zonum2\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2.png?fit=630%2C488&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2-630x488.png?resize=630%2C488\" alt=\"\" title=\"zonum2\" width=\"630\" height=\"488\" class=\"aligncenter size-large wp-image-210\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2.png?resize=630%2C488&amp;ssl=1 630w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2.png?resize=300%2C232&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum2.png?w=741&amp;ssl=1 741w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/a><br \/>\nChoisissez les unit\u00e9s (m\u00e8tres) et le type de fichier texte. Pour ArcGis nous vous conseillons de choisir le s\u00e9parateur virgule (comma).<br \/>\nUne fen\u00eatre avec les donn\u00e9es ascii s&rsquo;affiche.<br \/>\n<a href=\"http:\/\/www.sigterritoires.fr\/?attachment_id=211\" rel=\"attachment wp-att-211\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"211\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/comment-extraire-les-hauteurs-de-terrain-de-goggle-earth-pour-faire-son-propre-mnt\/zonum3\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3.png?fit=739%2C662&amp;ssl=1\" data-orig-size=\"739,662\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"zonum3\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3.png?fit=630%2C564&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3-630x564.png?resize=630%2C564\" alt=\"\" title=\"zonum3\" width=\"630\" height=\"564\" class=\"aligncenter size-large wp-image-211\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3.png?resize=630%2C564&amp;ssl=1 630w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3.png?resize=300%2C268&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2015\/02\/zonum3.png?w=739&amp;ssl=1 739w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/a><br \/>\nS\u00e9lectionnez tout le contenu (Ctrl A), copiez-le dans le presse papier (Ctrl C).<br \/>\nOuvrez un nouveau fichier avec le bloc notes.<br \/>\nCopier le contenu du presse papier (Ctrl V)<br \/>\nEnregistrez le fichier avec le nom choisi et n&rsquo;oubliez pas de changer le type de fichier de *.txt en *.* (Tous les fichiers) pour pouvoir lui mettre une extension .csv. De cette mani\u00e8re vous pouvez le charger dans ArcGis directement et sans probl\u00e8me.<\/p>\n<p><strong>Attention<\/strong> quand m\u00eame \u00e0 un d\u00e9tail: si vous avez des zones marines dans votre emprise, les points situ\u00e9s sur l&rsquo;eau auront comme valeur -32768.000. Si vous les laissez tels quels vous aurez des surprises au moment de la g\u00e9n\u00e9ration du MNT!<br \/>\nSelon votre choix pour la fabrication du MNT, remplacez les valeurs par des 0 ou bien effacez les lignes concern\u00e9es.<br \/>\nDernier conseil pour la route, n&rsquo;oubliez pas de commencer votre processus de g\u00e9n\u00e9ration du MNT en projetant les donn\u00e9es de Google Earth: elles sont en latitude-longitude WGS84 et pour g\u00e9n\u00e9rer des MNT il vous faut des donn\u00e9es projet\u00e9es (lambert 93, par exemple), les m\u00eathodes d&rsquo;interpolation pouvanr donner des r\u00e9sultats un peu bizarres si vous restez en degr\u00e9s.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Allez sur le site http:\/\/www.zonums.com\/gmaps\/terrain.php?action=sample Ne vous inqui\u00e9tez pas, c&rsquo;est absolument gratuit. Vous avez \u00e0 d\u00e9finir deux choses: 1- La m\u00e9thode \u00e9chantillonnage Soit vous souhaitez une grille r\u00e9guli\u00e8re, soit des points au hasard. Dans les deux&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[30,26],"tags":[31,33,32,34,25,23],"class_list":["post-206","post","type-post","status-publish","format-standard","hentry","category-donnees-gratuites","category-outils-et-methodes","tag-donnees-gratuites-2","tag-elevation","tag-google-earth","tag-hauteur","tag-mnt","tag-terrain"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- 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