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Zero-Shot Detection for Automatic Mapping of Illegal Roadside Waste
Mapping illegal roadside waste from Mapillary SVI using the SAM 3 foundation model, without any task-specific retraining.
Interactive Demos
Simply run our demos in your favorite web browser! All demos include code and docs.
Knowledge Graph of Hamburg HafenCity CityGML
Our graph representation of an excerpt CityGML dataset of the HafenCity district in Hamburg.
Hamburg Parking Availability Prediction — SHARE GNN
A Graph Neural Network system for predicting parking availability across Hamburg's public parking facilities
Pothole Detection and Semantic 3D City Model Enrichment
An interactive 3D web demo showcasing automated pothole detection on SVI from a district in Hamburg, Germany.
Buildings with Estimated Storey Counts🏆
End-to-end pipeline for automatic building storey estimation from VGI to semantically enrich CityGML-based 3D city models.
Graph-based Flood-Aware Evacuation Routing
Graph-based pedestrian routing under flood conditions during the January 2024 Brandenburg flood.
Nearest AED Routing & Coverage Analysis
Network-based routing to the nearest automated external defibrillator with walk-time isochrone coverage.
Urban Heat Islands — Roof Greening Impact Viewer
UHI simulation and visualisation of greening potential using roof-material predictions, from Hamburg, Germany.
Land-use Prediction for Historical Urban Plans
Interactive visualization of land-cover predictions for historical maps (Straube-Karten) of Berlin.
Smarter Cycling Routes Through Crowd-Sourced Data
A semantic approach to personalised route recommendation using weighted topic modelling.
Buildings with Enriched Roof Materials
Interactive 3D visualization of buildings in Hamburg enriched with predicted roof materials.
News
Latest updates from our group — follow us on LinkedIn for more.
Awards & Distinctions
Recognition received by our group at international venues.
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Best Young Author Award Domain-Adaptive Object Detection for Enriching Semantic 3D City Models with Building Storeys from Street-View Images XXV ISPRS Congress 2026, Toronto, Canada
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Best Poster Award Particle Filter-Based Indoor Localization with Learning Based PDR and Monocular Depth-Aided BIM Matching IPIN-WCAL 2025, 15th International Conference on Indoor Positioning and Indoor Navigation, Tampere, Finland
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Best Dissertation and Best PhD Presentation Automatic Detection and Interpretation of Changes in Massive Semantic 3D City Models Förderpreise Runder Tisch GIS e.V. 2025, Technical University of Munich, Germany
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Best Paper Award Safety assessment of cycling routes in urban environments Smart Data and Smart Cities Conference — Smart People Category, Athens, 2024
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Best Paper Award Suitability Assessment of Different Sensors to Detect Hidden Installations for As-built BIM ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. — Digital Construction: BIM Application Workshop, 2023
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Best Young Researcher Paper Award Path-tracing Semantic Networks to Interpret Changes in Semantic 3D City Models 17th International Conference 3D GeoInfo 2022, University of New South Wales, Sydney, Australia
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Outstanding Paper Award Modelling Changes, Stakeholders and their Relations in Semantic 3D City Models 16th International Conference 3D GeoInfo 2021, New York University, New York, United States of America
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Excellent Teaching (Goldene Lehre) Best Exercise Course in "Introduction to Computer Science 2" (Summer) Department of Aerospace and Geodesy, Technical University of Munich, Germany, 2020
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Excellent Teaching (Goldene Lehre) Best Exercise Course in "Project Work in Geoinformatics" (Winter) Department of Aerospace and Geodesy, Technical University of Munich, Germany, 2020
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Best Paper Award Active Sampling and Model Based Prediction for Fast and Robust Detection and Reconstruction of Complex Roofs in 3D Point Clouds ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-4/W8, 43–50, Proc. 14th 3D Geoinfo Conference, 2019
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Best Paper Award Improving GPS Trajectories Using 3D City Models and Kinematic Point Clouds ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-4/W9, 35–42, Proc. 4th International Conference on Smart Data and Smart Cities, 2019
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Best Paper Award Inferring Routing Preferences of Bicyclists from Sparse Sets of Trajectories ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-4/W7, 107–114, Proc. 3rd International Conference on Smart Data and Smart Cities, 2018
Published Datasets
Openly licensed datasets with DOIs, standard metadata, and baselines.
| Dataset | Version | Size | License | DOI | Download |
|---|---|---|---|---|---|
| Benchmark Dataset for Indoor Electrical Utilities Object detection for power sockets and light switches |
2026-1.0 | 368.9 MB | CC BY 4.0 | 10.5281/zenodo.18835199 | Site · Mirror · Bib |
| Ingolstadt Roofmats CityGML3 CityGML 3.0 enriched with roof materials |
2026-1.0 | 56.0 MB | CC BY 4.0 | Pending | Site · Mirror · Bib |
| Ingolstadt Roofmats CityGML2 CityGML 2.0 enriched with roof materials |
2026-1.0 | 43.5 MB | CC BY 4.0 | Pending | Site · Mirror · Bib |
| Hamburg Roofmats CityGML2 CityGML 2.0 enriched with roof materials |
2025-1.0 | 6.5 GB | CC BY 4.0 | 10.5281/zenodo.18896534 | Site · Mirror · Bib |
| Hamburg Roofmats CityGML3 CityGML 3.0 enriched with roof materials |
2025-1.0 | 6.5 GB | CC BY 4.0 | 10.5281/zenodo.18896614 | Site · Mirror · Bib |
| Semantic Segmentation Dataset for Historical Maps Benchmark dataset for homogeneous corpora |
2025-1.0 | 52.7 MB | CC BY 4.0 | 10.5281/zenodo.17579452 | Site · Mirror · Bib |
| Rooftop Drainage Outlets and Ventilations Dataset Dataset for drainage detection on flat rooftops |
2025-1.0 | 62.5 MB | CC BY 4.0 | 10.5281/zenodo.14040571 | Site · Mirror · Bib |
Recent Publications
Peer‑reviewed work from our group and collaborators.
- pykci: A Compact Urban Knowledge Graph for Semantic and Spatial Queries using LLMs arXiv preprint arXiv:2607.01605, 2026 Paper
- Graph-Based Safe-Routing for Flood-Aware Evacuation in Urban Environments ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, SDSC 2026 — Accepted for publication
- Zero-Shot Detection for Automatic Mapping of Illegal Roadside Waste Dumps from Volunteered Street-View Imagery ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, SDSC 2026 — Accepted for publication
- End-to-End Pothole Detection and Semantic 3D City Model Enrichment Using LoRA-Adapted Foundation Models and Open Street-Level Imagery ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 3D GeoInfo 2026 — Accepted for publication
- Neurosymbolic Scene Graph Generation in the Open-Vocabulary Setting Workshop on Neuro-Symbolic Intelligence for LLMs and Autonomous Agents, 2026 Paper
- 3D Spatial Pattern Matching arXiv preprint arXiv:2606.26465, 2026 Paper
- Multi-Modal Contrastive Learning for Implicit Earth Embeddings via Location Tying arXiv preprint arXiv:2606.20167, 2026 Paper
- Reconstructing GRACE Terrestrial Water Storage with Spatio-Temporal Graph Neural Networks: An Application to South America arXiv preprint arXiv:2606.23833, 2026 Paper
- SVI2LoD3: Agent-Driven Reconstruction of LoD3 Façade Openings in Semantic 3D City Models from Volunteered Street View Imagery using Large Language and Visual Models ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, X-4/W6-2026:01--08, 2026 Paper
- Spatial Modelling for Bridge Construction Environment Towards Geospatial Digital Twin International Journal of Applied Earth Observation and Geoinformation, 149:105296, 2026 Paper· Bib
- Domain-Adaptive Object Detection for Enriching Semantic 3D City Models with Building Storeys from Street-View Images ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2026 — Accepted for publication Paper· Code· Bib
- Domain-Adaptive Object Detection of Electrical Facilities for Enhanced Semantic Indoor Models ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2026 — Accepted for publication
- Semantic Enrichment of 3D City Models via Roof-material Classification for Urban Greening and Heat Island Mitigation Elsevier SSRN, 2026 (preprint) Paper· Code· Bib
- Automatic Uncertainty-Aware Synthetic Data Bootstrapping for Historical Map Segmentation arXiv preprint arXiv:2511.15875, 2025 Paper
- Review of Passenger Flow Modeling Approaches Based on a Bibliometric Analysis arXiv preprint arXiv:2511.13742, 2025 Paper
- Bidirectional enrichment of OpenStreetMap and CityGML 3.0 to facilitate cycling safety assessment International Journal of Geographical Information Science, 1–24, 2025 Paper
- A 3D virtual geographic environment for flood representation towards risk communication arXiv preprint arXiv:2512.03839, 2025 Paper
- Using deformations of measuring noise distributions for the discrimination of 3D building model parts Second Edition of the Mediterranean Smart Cities Conference (MSCC'2025) — Accepted for publication
- Particle Filter-Based Indoor Localization with Learning Based PDR and Monocular Depth-Aided BIM Matching🏆 IPIN-WCAL 2025, Proc. of the Workshop for Computing & Advanced Localization at the 15th International Conference on Indoor Positioning and Indoor Navigation, Tampere, Finland — Best Poster Award
- Object Detection for the Enrichment of Semantic 3D City Models with Roofing Materials ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2025 Paper· Code· Bib
- Simultaneous planning of standpoints and routing for laser scanning of buildings with network redundancy ISPRS Journal of Photogrammetry and Remote Sensing, 224:59–74, 2025
- (Un)just Distribution of Visible Green Spaces? A Socio-Economic Window View Analysis on Residential Buildings: The City of Cologne as Case Study Journal of Geovisualization and Spatial Analysis, 9(1):17, 2025
- Smart Glasses in the Chicken Barn: Enhancing Animal Welfare Through Mixed Reality Smart Agricultural Technology, 2025
- Semantic Segmentation of Historical Maps using Self-Constructing Graph Convolutional Networks Cartography and Geographic Information Science, 2025 Paper
- Rooftop Drainage Outlets and Ventilations Dataset. Automatic Detection of Tiny Drainage Outlets and Ventilations on Flat Rooftops from Aerial Imagery GSW'2025, Dubai Dataset
- Automatic Detection of Tiny Drainage Outlets and Ventilations on Flat Rooftops from Aerial Imagery ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2025
- Validating a window view simulation engine based on open data and open source using semantic segmentation ISPRS GeoSpatial Week Dubai, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2025
- Informed sampling and recommendation of cycling routes: leveraging crowd-sourced trajectories with weighted-latent Dirichlet allocation International Journal of Geographical Information Science, 1–22, 2024 Paper
- Semantic floor plan segmentation using self-constructing graph networks Automation in Construction, 166:105649, 2024 Paper
- Deep Generation of Synthetic Training Data for the Automated Extraction of Semantic Knowledge from Historical Maps Abstracts of the International Cartographic Association, EuroCarto 2024, Vienna, Austria Paper
- Safety assessment of cycling routes in urban environments🏆 Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-4/W10-2024, 125–130, Smart Data and Smart Cities Conference, Athens, 2024 — Best Paper Award in the Smart People Category Paper
- Towards a Deep Automatic Generation of Figure-ground Maps ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2024
- A 3D virtual geographic environment for flood representation towards risk communication International Journal of Applied Earth Observation, 2024 Paper
- Visual attention-guided augmented representation of geographic scenes: A case of bridge stress visualization International Journal of Geographical Information Science, 1–23, 2024 Paper
- The green window view index: automated multi-source visibility analysis for a multi-scale assessment of green window views Landscape Ecology, 39, 71, 2024 Paper
- Catchment cell visualization for multi-modal public transportation networks 1st ACM SIGSPATIAL Workshop on Sustainable Mobility, Hamburg, 2023 Paper
- FPOPlus: Cutting-Edge Technology for Sustainable Future Mobility 1st ACM SIGSPATIAL Workshop on Sustainable Mobility, 2023
- Social Media Insights on Public Perception and Sentiment During and After Disasters: The European Floods in 2021 as a Case Study Transactions in GIS, 27(6):1766–1793, 2023 Paper
- Immersive virtual reality to verify the as-built state of electric line networks in buildings In: Kolbe, T.H., Donaubauer, A., Beil, C. (eds) Recent Advances in 3D Geoinformation Science. 3DGeoInfo 2023. Lecture Notes in Geoinformation and Cartography. Springer, Cham Paper
- Suitability Assessment of Different Sensors to Detect Hidden Installations for As-built BIM🏆 ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., X-1/W1-2023, 263–270, 2023 — Best Paper Award in the Digital Construction: BIM Application Workshop Paper
- An Interactive Evacuation Tool to Improve the Public Flood Perception Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVIII-1/W2-2023, 437–442, 2023 Paper
- Self-Constructing Graph Convolutional Networks for Semantic Segmentation of Historical Maps Abstracts of the International Cartographic Association, 6, 11, 2023. 31st ICC 2023, Cape Town, South Africa Paper
- Integrating cellular automata model into 3D representation for enhancing flood risk communication Abstracts of the International Cartographic Association, 6, 139, 2023. 31st ICC 2023, Cape Town, South Africa Paper
- Incremental constraint-based reasoning for estimating as-built electric line routing in buildings Automation in Construction, 143:104571, 2022 Paper
- Three-dimensional virtual representation for the whole process of dam-break floods from a geospatial storytelling perspective International Journal of Digital Earth, 15:1637–1656, 2022 Paper
- Automatic building footprint extraction from 3D laserscans ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., X-4/W2-2022:233–240, 2022 Paper
- Visualizing the modal split in public transportation networks Abstracts of the ICA, 5:89, 2022
- Optimal position and path planning for stop-and-go laserscanning for the acquisition of 3D building models ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., V-4-2022:129–136, 2022 Paper
- Investigations of disaster information representation from a geospatial perspective: progress, challenges and recommendations Transactions in GIS, 26(3):1376–1398, 2022 Paper
- Geospatial Intelligence: Applications and Future Trends Springer International Publishing, 2022
- Optimal scan planning with enforced network connectivity for the acquisition of three-dimensional indoor models ISPRS Journal of Photogrammetry and Remote Sensing, 180:103–116, 2021 Paper
- Improving trajectory estimation using 3D city models and kinematic point clouds Transactions in GIS, 25(1):238–260, 2021 Paper
- Robust and fast reconstruction of complex roofs with active sampling from 3D point clouds Transactions in GIS, 25(1):112–133, 2021 Paper
- Looking for a needle in a haystack: probability density based classification and reconstruction of dormers from 3D point clouds Transactions in GIS, 25(1):44–70, 2021 Paper
- Multimodal travel-time maps with formally correct and schematic isochrones Transactions in GIS, 25(6):3233–3256, 2021 Paper
- UAV mission planning for automatic exploration and semantic mapping ISPRS Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B1-2020:521–526, 2020
Our Team
We are a passionate group spanning ML/DL, Geospatial Data, and Knowledge Graphs.
Prof. Dr.-Ing. Youness Dehbi
Group Lead
Dr. rer. nat. Huynh Duc An Son Nguyen
Postdoc, Team Coordinator
Lukas Arzoumanidis, M.Sc.
PhD Student
Elmehdi Kanna, M.Sc.
PhD Student
Badreddine Ouzougarh, M.Sc.
PhD Student
Eduardo Verdugo Fernandez, M.
PhD Student
Jannik Matijevic, B.Sc.
Student Assistant
Al Maimun As Samee, B.Sc.
Student Assistant
Leonie Schöder, B.Sc.
Student Assistant
Hauke Harriehausen, B.Sc.
Student Assistant
Lena Hildebrandt
Student Assistant
Projects
Ongoing research and development projects.
NGCN - Next Generation City Networking
Lösungsansätze für die Mobilität der Zukunft, deren systemischer Ansatz eine innovative Funk- und Kommunikationsinfrastruktur mit einer daten- basierten Modellplattform für die 15-Minuten-Stadt und dem Anwendungsfall Notfallhilfe verbinden.
VisioChick
Tierschutz und Tierwohl in der Geflügelhaltung durch ein innovatives Mixed-Reality (MR)-System und entsprechende Lehrmaterialien für verschiedene Zielgruppen attraktiver und praxisnäher gestalten.
FPOplus - Smarte Daten für optimierte Personenströme
Aufbau eines Flowmanagement-Systems für Personenströme unter Einsatz innovativer Netztechnologien (5G) im Rahmen einer Kooperation mit weiteren Universitäten und der Deutschen Bahn.