{"id":3327,"date":"2020-04-15T20:57:31","date_gmt":"2020-04-15T18:57:31","guid":{"rendered":"https:\/\/www.ngi.be\/website\/offre\/geodonnees-numeriques\/digitaal-terrein-model\/"},"modified":"2026-07-09T13:29:25","modified_gmt":"2026-07-09T11:29:25","slug":"modele-numerique-de-terrain","status":"publish","type":"page","link":"https:\/\/ngi.be\/fr\/offre\/geodonnees-numeriques\/modele-numerique-de-terrain\/","title":{"rendered":"Produits altim\u00e9triques"},"content":{"rendered":"

L\u2019IGN propose diff\u00e9rents produits altim\u00e9triques permettant de mod\u00e9liser le relief de la Belgique.<\/p>\n

Mod\u00e8le num\u00e9rique de terrain (MNT 1 m et 5 m)\u00a0<\/strong><\/p>\n

\"\"<\/p>\n

Le mod\u00e8le num\u00e9rique de terrain (Digital Terrain Model, DTM) est une repr\u00e9sentation du relief en 2D. Il se pr\u00e9sente sous la forme d\u2019une grille homog\u00e8ne et r\u00e9guli\u00e8re de points indiquant la hauteur par rapport au niveau du sol afin d\u2019en mod\u00e9liser la surface, sans tenir compte des \u00e9l\u00e9ments pr\u00e9sents au sol tels que les b\u00e2timents ou la v\u00e9g\u00e9tation.<\/p>\n

Le DTM 1 m est une compilation des donn\u00e9es altim\u00e9triques r\u00e9gionales d\u2019une r\u00e9solution de 1\u00a0m. Il est disponible sur commande via sales@ngi.be<\/a>.<\/p>\n

Le DTM 5\u00a0m est interpol\u00e9 \u00e0 partir du DTM 1\u00a0m. Il est en outre mis \u00e0 jour par l\u2019IGN \u00e0 partir de relev\u00e9s photogramm\u00e9triques directs r\u00e9alis\u00e9s \u00e0 partir des photographies a\u00e9riennes les plus r\u00e9centes (corrections concernant les carri\u00e8res, les ponts, les \u00e9l\u00e9ments locaux, etc.). Le DTM 5\u00a0m est disponible en t\u00e9l\u00e9chargement gratuit via le portail de t\u00e9l\u00e9chargement<\/a>.
\ngeo.be | DTM 5 m<\/a><\/p>\n

Mod\u00e8le num\u00e9rique de surface (MNS 1 m) <\/strong><\/p>\n

\"\"<\/p>\n

Le mod\u00e8le num\u00e9rique de surface (Digital Surface Model, DSM) est une repr\u00e9sentation du relief en 2D qui, contrairement au MNT, prend en compte les \u00e9l\u00e9ments de surface tels que les constructions et la v\u00e9g\u00e9tation. Il est disponible \u00e0 une r\u00e9solution de 1\u00a0m et constitue une compilation des donn\u00e9es r\u00e9gionales. Il est disponible sur commande via sales@ngi.be<\/a>.
\ngeo.be | DSM 1 m<\/a><\/p>\n

Ombrages de relief<\/strong><\/p>\n

\"\"\"\"<\/p>\n

Les ombrages ou Hillshades<\/em> sont des repr\u00e9sentations visuelles en niveaux de gris qui mettent en \u00e9vidence le relief gr\u00e2ce \u00e0 un \u00e9clairage simul\u00e9. Ils permettent de visualiser rapidement la configuration du terrain. L\u2019IGN propose trois produits\u00a0: Hillshade DTM 1\u00a0m, Hillshade DSM 1\u00a0m et Hillshade DTM 5\u00a0m. Ces produits sont disponibles sur commande via sales@ngi.be<\/a>.<\/p>\n

geo.be | Hillshade DTM 1m<\/a>
\ngeo.be | Hillshade DSM 1m<\/a>
\ngeo.be | Hillshade DTM 5m<\/a><\/p>\n

Courbes de niveau<\/strong><\/p>\n

\"\"<\/p>\n

Les courbes de niveau \u00e0 grande \u00e9chelle (Large Scale Contour Lines, LSCL) sont g\u00e9n\u00e9r\u00e9es \u00e0 partir du DTM 5 m pour l\u2019ensemble de la Belgique, avec un espacement de 1,25 m. Elles sont \u00e0 l\u2019\u00e9chelle 1:10 000 et disponibles en t\u00e9l\u00e9chargement gratuit via le portail de t\u00e9l\u00e9chargement<\/a>.<\/p>\n

geo.be\u00a0| Courbes de niveau grande \u00e9chelle<\/a><\/p>\n

Pour commander un produit ou demander un devis, consultez notre politique de prix<\/a> ou contactez-nous via sales@ngi.be<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le DTM (appel\u00e9 aussi MNT pour mod\u00e8le num\u00e9rique de terrain) est, en premi\u00e8re instance, utilis\u00e9 en interne comme surface de r\u00e9f\u00e9rence pour des applications \u00e0 l’\u00e9chelle 1:10 000. <\/p>\n","protected":false},"author":13,"featured_media":3326,"parent":311,"menu_order":152,"comment_status":"closed","ping_status":"closed","template":"tpl-product.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-3327","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nProduits altim\u00e9triques - IGN<\/title>\n<meta name=\"description\" content=\"L'IGN met \u00e0 disposition diff\u00e9rents jeux de donn\u00e9es altim\u00e9triques : mod\u00e8les num\u00e9riques de terrain, mod\u00e8le num\u00e9rique de surface, courbes de niveau...Ces donn\u00e9es permettent de mod\u00e9liser le relief belge \u00e0 diff\u00e9rentes \u00e9chelles.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ngi.be\/fr\/offre\/geodonnees-numeriques\/modele-numerique-de-terrain\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Produits altim\u00e9triques - 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