Apparatus and method for terrain model reproduction

G - Physics – 06 – T

Patent

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G06T 17/05 (2011.01)

Patent

CA 2202655

The present invention relates to a method and an apparatus which reproduce a digital terrain model (DTM) from contour data with geomorphological consistency and natural features including fine folds. An initial DTM h o is produced (step 101), and set h o as an initial value (step 102). Then the operator T which smooths the elevational values along flowing water lines or the neighborhood of the lines is operated on the DTM h (step 103), further the operator B which sets the boundary values by substituting the contour data is operated on the DTM h (step 104). The number n of operating times of the steps 103 and 104 is checked (step 105). If n is less than preset number n max, return to the step 103 and if n reaches n max, go to the step 106 and the DTM h is output.

L'invention concerne un procédé et un dispositif reproduisant un modèle numérique de terrain (DTM), à partir de données de profil, présentant une cohérence géomorphologique et des caractéristiques naturelles, y compris des reliefs fins. On génère une valeur ho de DTM (étape 101) et on consigne ho en tant que valeur initiale (étape 102). On applique ensuite à la valeur h de DTM (étape 103) l'opérateur T qui égalise les valeurs d'élévation le long des tracés des cours d'eau ou à proximité de ces derniers, puis on applique à h de DTM (étape 104) l'opérateur B qui consigne les valeurs des limites par substitution des données de profil. On vérifie le nombre n des temps d'opération des étapes 103 et 104 (étape 105). Si n est inférieur au nombre prédéterminé nmax, on revient à l'étape 103 et si n atteint nmax, on passe à l'étape 106 et on extrait le h de DTM.

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