HeatMat: Simulation of City Material Impact on Urban Heat Island Effect

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dc.contributor.authorReinbigler, Marie
dc.contributor.authorRouffet, Romain
dc.contributor.authorNaylor, Peter
dc.contributor.authorCzerkawski, Mikolaj
dc.contributor.authorDionelis, Nikolaos
dc.contributor.authorBrunet, Elisabeth
dc.contributor.authorFetita, Catalin
dc.contributor.authorMartin, Rosalie
dc.contributor.editorMasia, Belen
dc.contributor.editorThies, Justus
dc.date.accessioned2026-04-17T12:39:41Z
dc.date.available2026-04-17T12:39:41Z
dc.date.issued2026
dc.description.abstractThe Urban Heat Island (UHI) effect, defined as a significant increase in temperature in urban environments compared to surrounding areas, is difficult to study in real cities using sensor data (satellites or in-situ stations) due to their coarse spatial and temporal resolution. Among the factors contributing to this effect are the properties of urban materials, which differ from those in rural areas. To analyze their individual impact and to test new material configurations, a high-resolution simulation at the city scale is required. Estimating the current materials used in a city, including those on building facades, is also challenging. We propose HeatMat, an approach to analyze at high resolution the individual impact of urban materials on the UHI effect in a real city, relying only on open data. We estimate building materials using street-view images and a pre-trained vision-language model (VLM) to supplement existing OpenStreetMap data, which describes the 2D geometry and features of buildings. We further encode this information into a set of 2D maps that represent the city's vertical structure and material characteristics. These maps serve as inputs for our 2.5D simulator, which models coupled heat transfers and enables random-access surface temperature estimation at multiple resolutions, reaching a 20x speedup compared to an equivalent simulation in 3D.
dc.description.number2
dc.description.sectionheadersTemporal Vision: Video Generation, Pose, and Narrative
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume45
dc.identifier.doi10.1111/cgf.70376
dc.identifier.issn1467-8659
dc.identifier.pages13 pages
dc.identifier.urihttps://diglib.eg.org/handle/10.1111/cgf70376
dc.identifier.urihttps://doi.org/10.1111/cgf.70376
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.
dc.rightsCC-BY-4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectComputer vision
dc.subjectPhysical simulation
dc.subjectComputer-aided design
dc.titleHeatMat: Simulation of City Material Impact on Urban Heat Island Effect
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