3 papers
cs.CV2026
SVI2LoD3: Agent-Driven Reconstruction of LoD3 Facade Openings in Semantic 3D City Models from Volunteered Street View Imagery using Large Language and Visual Models
Elmehdi Kanna, Lukas Arzoumanidis, Huynh Duc An Son Nguyen +1
This paper presents an end-to-end, agent-driven pipeline for the LoD3 reconstruction of facade openings in 3D city models, producing directly usable CityGML-conform outputs. In con…
cs.DB2026
AuthentiCity: A Multi-Source Provenance-Aware Knowledge Graph and Benchmark for 3D City Models
Huynh Duc An Son Nguyen, Lukas Arzoumanidis, Youness Dehbi
Urban digital twins increasingly combine authoritative, crowd-sourced, machine-learned, and reconstructed data with differing reliability, coverage, and semantics. Yet few urban da…
cs.DB2026
pykci: A Compact Urban Knowledge Graph for Semantic and Spatial Queries using LLMs
Huynh Duc An Son Nguyen, Lukas Arzoumanidis, Youness Dehbi
CityGML, the OGC standard for modeling, storage, and exchange of semantic 3D city models, describes urban objects with detailed semantics, geometry, and topology. Yet this richness…