HCU Computational Methods Lab (CML) - Demos, Datasets and Publications

Interactive Demos

Simply run our demos in your favorite web browser! All demos include code and docs.

Animated preview of a knowledge graph representation of the Hamburg HafenCity CityGML dataset

Knowledge Graph of Hamburg HafenCity CityGML

Our graph representation of an excerpt CityGML dataset of the HafenCity district in Hamburg.

Demo

Updated: 2026-06-06 / Tags: Knowledge Graph, Graph Database, Neo4j, Semantic 3D City Model, CityGML

Animated preview of Hamburg parking availability prediction with the SHARE GNN architecture

Hamburg Parking Availability Prediction — SHARE GNN

A Graph Neural Network system for predicting parking availability across Hamburg's public parking facilities

Demo Code

Updated: 2026-06-06 / Tags: Graph Neural Network, Parking Prediction, Spatiotemporal Forecasting

Preview of automated pothole detection on street-level imagery enriching a semantic 3D city model

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.

Demo Code

Updated: 2026-06-05 / Tags: SAM3, Object Detection, Semantic 3D City Models, Pothole Detection

Animated preview of automatic building storey estimation from street-view imagery

Buildings with Estimated Storey Counts^🏆

End-to-end pipeline for automatic building storey estimation from VGI to semantically enrich CityGML-based 3D city models.

Demo Code Paper

Updated: 2026-06-05 / Tags: Domain-Adaptive Object Detection, Building Storey Estimation, CityGML, Semantic Enrichment

Animated preview of flood-aware evacuation routing comparing safe and direct paths

Graph-based Flood-Aware Evacuation Routing

Graph-based pedestrian routing under flood conditions during the January 2024 Brandenburg flood.

Demo

Updated: 2026-06-04 / Tags: Flood Risk, Evacuation Planning, Graph-Based Model, Urban Network Analysis, Safe-Routing

Animated preview of nearest AED routing with walk-time isochrone coverage analysis

Nearest AED Routing & Coverage Analysis

Network-based routing to the nearest automated external defibrillator with walk-time isochrone coverage.

Demo

Updated: 2026-06-03 / Tags: AED Routing, Emergency Response, Isochrone Analysis, Graph-Based Model, Urban Network Analysis

Animated preview of UHI simulation and roof greening impact viewer for Hamburg

Urban Heat Islands — Roof Greening Impact Viewer

UHI simulation and visualisation of greening potential using roof-material predictions, from Hamburg, Germany.

Demo Code Paper

Updated: 2026-05-27 / Tags: Roof-material Classification, UHI, Roof Greening, Semantic Enrichment, CityGML

Animated preview of land-use class prediction on historical Straube maps of Berlin

Land-use Prediction for Historical Urban Plans

Interactive visualization of land-cover predictions for historical maps (Straube-Karten) of Berlin.

Demo Code Paper 1 Paper 2

Updated: 2026-05-07 / Tags: Aleatoric Uncertainty, Cartographic Style Transfer, Domain-Adaptive Semantic Segmentation

Animated preview of personalised cycling-route recommendations driven by weighted latent Dirichlet allocation

Smarter Cycling Routes Through Crowd-Sourced Data

A semantic approach to personalised route recommendation using weighted topic modelling.

Demo Code Paper

Updated: 2026-03-18 / Tags: Cycling Route Recommendation, Weighted-Latent Dirichlet Allocation, Crowd-Sourced Trajectories

Buildings with Enriched Roof Materials

Interactive 3D visualization of buildings in Hamburg enriched with predicted roof materials.

Demo Code Paper 1 Paper 2

Updated: 2026-03-04 / Tags: Classification, Semantic Enrichment, CityGML, Urban Heat Island

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 Lukas Arzoumanidis, Al Maimun As Samee, Elmehdi Kanna, Son H. Nguyen, Youness Dehbi 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 P. K. Jaisawal, Y. Dehbi, H. Sternberg 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 Huynh Duc An Son Nguyen 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 Y. Dehbi, W. Li, L. Arzoumanidis, J. Matijevic, D. M. Mustafa, P. Rottmann, J.-H. Haunert 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 Y. Dehbi, J. Knechtel, J. Behmann, J.-H. Haunert 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 S. H. Nguyen, T. H. Kolbe 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 S. H. Nguyen, T. H. Kolbe 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) Huynh Duc An Son Nguyen, Tatjana Kutzner 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) Huynh Duc An Son Nguyen, Tatjana Kutzner 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 Y. Dehbi, A. Henn, G. Gröger, V. Stroh, L. Plümer 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 Y. Dehbi, L. Lucks, J. Behmann, L. Klingbeil, L. Plümer 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 J. Oehrlein, A. Förster, D. Schunck, Y. Dehbi, R. Roscher, J.-H. Haunert 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

Dataset Request Download BibTeX

Recent Publications

Peer‑reviewed work from our group and collaborators.

Spatial Modelling for Bridge Construction Environment Towards Geospatial Digital Twin International Journal of Applied Earth Observation and Geoinformation, 2026 — Accepted for publication W. Li, J. Zhu, Q. Zhu, J. Zhang, J. Wu, Y. Dehbi
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 L. Arzoumanidis, A. M. As Samee, E. Kanna, S. H. Nguyen, Y. Dehbi
Domain-Adaptive Object Detection of Electrical Facilities for Enhanced Semantic Indoor Models ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2026 — Accepted for publication L. Arzoumanidis, W. Li, Y. Dehbi
Semantic Enrichment of 3D City Models via Roof-material Classification for Urban Greening and Heat Island Mitigation Elsevier SSRN, 2026 (preprint) E. Kanna, J. Matijevic, L. Arzoumanidis, S. H. Nguyen, Y. Dehbi Paper· Code· Bib
Automatic Uncertainty-Aware Synthetic Data Bootstrapping for Historical Map Segmentation arXiv preprint arXiv:2511.15875, 2025 L. Arzoumanidis, J. Knechtel, J.-H. Haunert, Y. Dehbi Paper
Review of Passenger Flow Modeling Approaches Based on a Bibliometric Analysis arXiv preprint arXiv:2511.13742, 2025 J. Hecht, W. Li, Z. Li, Y. Dehbi Paper
Bidirectional enrichment of OpenStreetMap and CityGML 3.0 to facilitate cycling safety assessment International Journal of Geographical Information Science, 1–24, 2025 W. Li, J. Matijevic, C. Beil, L. Arzoumanidis, T. H. Kolbe, Y. Dehbi Paper
A 3D virtual geographic environment for flood representation towards risk communication arXiv preprint arXiv:2512.03839, 2025 W. Li, J. Zhu, S. Pirasteh, Q. Zhu, Y. Guo, L. Luo, Y. Dehbi 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 Y. Dehbi, E. Kanna, S. Koppers, L. Plümer
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 P. K. Jaisawal, Y. Dehbi, H. Sternberg
Object Detection for the Enrichment of Semantic 3D City Models with Roofing Materials ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2025 L. Arzoumanidis, S. H. Nguyen, L. Johannsen, F. Rothaut, W. Li, Y. Dehbi 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 J. Knechtel, Y. Dehbi, L. Klingbeil, J.-H. Haunert
(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 A. M. Bolte, T. Kistemann, Y. Dehbi, T. Kötter
Smart Glasses in the Chicken Barn: Enhancing Animal Welfare Through Mixed Reality Smart Agricultural Technology, 2025 D. Baltzer, S. Douglas, J.-H. Haunert, Y. Dehbi, I. Tiemann
Semantic Segmentation of Historical Maps using Self-Constructing Graph Convolutional Networks Cartography and Geographic Information Science, 2025 L. Arzoumanidis, J. Knechtel, J.-H. Haunert, Y. Dehbi Paper
Rooftop Drainage Outlets and Ventilations Dataset. Automatic Detection of Tiny Drainage Outlets and Ventilations on Flat Rooftops from Aerial Imagery GSW'2025, Dubai L. Arzoumanidis*, J. Knechtel*, G. Sen*, W. Li, Y. Dehbi Dataset
Automatic Detection of Tiny Drainage Outlets and Ventilations on Flat Rooftops from Aerial Imagery ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2025 L. Arzoumanidis, W. Li, J. Knechtel, Y. Kosmayadi, Y. Dehbi
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 A.-M. Bolte, T. Kistemann, T. Kötter, Y. Dehbi
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 W. Li, J.-H. Haunert, A. Forsch, J. Zhu, Q. Zhu, Y. Dehbi Paper
Semantic floor plan segmentation using self-constructing graph networks Automation in Construction, 166:105649, 2024 J. Knechtel, P. Rottmann, J.-H. Haunert, Y. Dehbi 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 L. Arzoumanidis, J. O. Fethers, S. H. Mudiyanselage, Y. Dehbi 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 W. Li, L. Arzoumanidis, J. Matijevic, D. Mohammed, P. Rottmann, J.-H. Haunert, Y. Dehbi Paper
Towards a Deep Automatic Generation of Figure-ground Maps ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., 2024 L. Arzoumanidis, J. Hecht, Y. Dehbi
A 3D virtual geographic environment for flood representation towards risk communication International Journal of Applied Earth Observation, 2024 W. Li, J. Zhu, S. Pirasteh, Q. Zhu, Y. Guo, L. Luo, Y. Dehbi Paper
Visual attention-guided augmented representation of geographic scenes: A case of bridge stress visualization International Journal of Geographical Information Science, 1–23, 2024 W. Li, J. Zhu, Q. Zhu, J. Zhang, X. Han, Y. Dehbi 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 A. Bolte, B. Niedermann, T. Kistemann, J.-H. Haunert, Y. Dehbi, T. Kötter Paper
Catchment cell visualization for multi-modal public transportation networks 1st ACM SIGSPATIAL Workshop on Sustainable Mobility, Hamburg, 2023 L. Arzoumanidis, A. Forsch, J.-H. Haunert, Y. Dehbi Paper
FPOPlus: Cutting-Edge Technology for Sustainable Future Mobility 1st ACM SIGSPATIAL Workshop on Sustainable Mobility, 2023 J. M.-Lietzkow, C. Nataliya, Y. Dehbi
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 W. Li, J.-H. Haunert, J. Knechtel, J. Zhu, Q. Zhu, Y. Dehbi 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 J. Knechtel, W. Li, Y. Orgeig, J.-H. Haunert, Y. Dehbi 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 J. Knechtel, J. Behmann, J.-H. Haunert, Y. Dehbi 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 W. Li, N. Treff, F. Amann, J. Lehmen, Y. Dehbi, J.-H. Haunert 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 L. Arzoumanidis, J. Knechtel, J.-H. Haunert, Y. Dehbi 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 W. Li, Y. Guo, J.-H. Haunert, Y. Dehbi Paper
Incremental constraint-based reasoning for estimating as-built electric line routing in buildings Automation in Construction, 143:104571, 2022 Y. Dehbi, J. Knechtel, B. Niedermann, J.-H. Haunert 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 W. Li, J. Zhu, J.-H. Haunert, F. Lin, Q. Zhu, Y. Dehbi Paper
Automatic building footprint extraction from 3D laserscans ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., X-4/W2-2022:233–240, 2022 P. Rottmann, J.-H. Haunert, Y. Dehbi Paper
Visualizing the modal split in public transportation networks Abstracts of the ICA, 5:89, 2022 V. Korir, A. Forsch, Y. Dehbi, J.-H. Haunert
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 J. Knechtel, L. Klingbeil, J.-H. Haunert, Y. Dehbi Paper
Investigations of disaster information representation from a geospatial perspective: progress, challenges and recommendations Transactions in GIS, 26(3):1376–1398, 2022 W. Li, J. Zhu, S. Pirasteh, Q. Zhu, L. Fu, J. Wu, Y. Hu, Y. Dehbi Paper
Geospatial Intelligence: Applications and Future Trends Springer International Publishing, 2022 F. Barramou, K. Mansouri, Y. Dehbi (eds.)
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 Y. Dehbi, J. Leonhardt, J. Oehrlein, J.-H. Haunert Paper
Improving trajectory estimation using 3D city models and kinematic point clouds Transactions in GIS, 25(1):238–260, 2021 L. Lucks, L. Klingbeil, L. Plümer, Y. Dehbi Paper
Robust and fast reconstruction of complex roofs with active sampling from 3D point clouds Transactions in GIS, 25(1):112–133, 2021 Y. Dehbi, A. Henn, G. Gröger, V. Stroh, L. Plümer 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 Y. Dehbi, S. Koppers, L. Plümer Paper
Multimodal travel-time maps with formally correct and schematic isochrones Transactions in GIS, 25(6):3233–3256, 2021 A. Forsch, Y. Dehbi, B. Niedermann, J. Oehrlein, P. Rottmann, J.-H. Haunert 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 Y. Dehbi, L. Klingbeil, L. Plümer