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APPRENDRE À GÉNÉRER DES EXTRAITS DE
CARTE GÉNÉRALISÉE D’ESPACES URBAINS
Azelle Courtial et Guillaume Touya
LASTIG, Univ Gustave Eiffel, ENSG, IGN
APPRENDRE À GÉNÉRER DES EXTRAITS DE
CARTE GÉNÉRALISÉE D’ESPACES URBAINS
Azelle Courtial et Guillaume Touya
LASTIG, Univ Gustave Eiffel, ENSG, IGN
Contexte
• La généralisation cartographique est l’adaptation
d’un jeu de donnée détaillé pour une représentation
à une échelle plus petite.
• Dans les espaces urbains, les éléments prici-
paux sont les bâtiments, les routes et les rivières.
L’information est dense et les relations entre les objets
sont nombreuses.
• Le potentiel de l’apprentissage profond pour la
généralisation des routes [1] et des bâtiments [2] a été
expérimenté. Néanmoins, la généralisation conjointe
de plusieurs thèmes, la reduction de densité d’objets
et les relations entre objets n’ont pas été considérés
pour l’instant.
Objectifs
Transformations attendues Méthode
Résultats
Le résultat ressemble à la généralisation cible
et est lisible. Les contraintes sur la forme, la
densité, la taille et l’espacement des bâtiments
sont respectées.
Certaines structures semblent préservées,
d’autres pas. L’orientation relative est
préservée. Les relations entre routes ou
rivières et batiments sont problématiques.
Des bâtiments se superposent dans cer-
taines cartes généralisées utilisées pour
l’entrainement. Cela provoque des formes de
bâtiments irregulieres et/ou irréalistes dans la
prédiction.
Informations
• Thèse commencée en octobre 2019.
• Université Gustave Eiffel, école doctorale MSTIC.
• Thèse réalisée au LASTIG équipe GEOVIS.
• Direction : Guillaume Touya, encadrement : Xiang Zhang.
• Contact : azelle.courtial@ign.fr
Bibliographie
[1] Azelle Courtial, Achraf El Ayedi, Guillaume Touya, and Xiang Zhang. Exploring the potential of
deep learning segmentation for mountain roads generalisation. ISPRS International Journal of Geo-
Information, 9(5):338, 2020. Number: 5 Publisher: Multidisciplinary Digital Publishing Institute.
[2] Yu Feng, Frank Thiemann, and Monika Sester. Learning cartographic building generalization with deep
convolutional neural networks. International Journal of Geo-Information, 2019.
Journées de la Recherche IGN - 2021

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Apprendre à généérer des extraits de carte généralisée d'espaces urbains.

  • 1. APPRENDRE À GÉNÉRER DES EXTRAITS DE CARTE GÉNÉRALISÉE D’ESPACES URBAINS Azelle Courtial et Guillaume Touya LASTIG, Univ Gustave Eiffel, ENSG, IGN APPRENDRE À GÉNÉRER DES EXTRAITS DE CARTE GÉNÉRALISÉE D’ESPACES URBAINS Azelle Courtial et Guillaume Touya LASTIG, Univ Gustave Eiffel, ENSG, IGN Contexte • La généralisation cartographique est l’adaptation d’un jeu de donnée détaillé pour une représentation à une échelle plus petite. • Dans les espaces urbains, les éléments prici- paux sont les bâtiments, les routes et les rivières. L’information est dense et les relations entre les objets sont nombreuses. • Le potentiel de l’apprentissage profond pour la généralisation des routes [1] et des bâtiments [2] a été expérimenté. Néanmoins, la généralisation conjointe de plusieurs thèmes, la reduction de densité d’objets et les relations entre objets n’ont pas été considérés pour l’instant. Objectifs Transformations attendues Méthode Résultats Le résultat ressemble à la généralisation cible et est lisible. Les contraintes sur la forme, la densité, la taille et l’espacement des bâtiments sont respectées. Certaines structures semblent préservées, d’autres pas. L’orientation relative est préservée. Les relations entre routes ou rivières et batiments sont problématiques. Des bâtiments se superposent dans cer- taines cartes généralisées utilisées pour l’entrainement. Cela provoque des formes de bâtiments irregulieres et/ou irréalistes dans la prédiction. Informations • Thèse commencée en octobre 2019. • Université Gustave Eiffel, école doctorale MSTIC. • Thèse réalisée au LASTIG équipe GEOVIS. • Direction : Guillaume Touya, encadrement : Xiang Zhang. • Contact : azelle.courtial@ign.fr Bibliographie [1] Azelle Courtial, Achraf El Ayedi, Guillaume Touya, and Xiang Zhang. Exploring the potential of deep learning segmentation for mountain roads generalisation. ISPRS International Journal of Geo- Information, 9(5):338, 2020. Number: 5 Publisher: Multidisciplinary Digital Publishing Institute. [2] Yu Feng, Frank Thiemann, and Monika Sester. Learning cartographic building generalization with deep convolutional neural networks. International Journal of Geo-Information, 2019. Journées de la Recherche IGN - 2021