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HeatMat: Simulation of City Material Impact on Urban Heat Island Effect
Marie Reinbigler, Romain Rouffet, Peter Naylor, Mikolaj Czerkawski, Nikolaos Dionelis, Elisabeth Brunet, Catalin Fetita, Rosalie Martin
https://arxiv.org/abs/2601.22796 https://arxiv.org/pdf/2601.22796 https://arxiv.org/html/2601.22796
arXiv:2601.22796v1 Announce Type: new
Abstract: The 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 an x20 speedup compared to an equivalent simulation in 3D.
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Ooh. There’s an interesting pull request for the #OpenStreetMap iD editor to allow viewing some #WikimediaCommons photos within the editor in a similar manner to street-level photos from #Mapillary…

100 of the ~280 linden trees of #Mäkelänkatu in #Helsinki have been cut. Some of the last trunks are being removed right now.
Judging from the growth rings, some of these trees were about 50 years old and had their best days a few decades ago, but also some good summers recently. Trees rarely…

Good Morning #Canada
Today's post about #CanadianCapitals is a town that has the most tennis courts per capita in Canada. I got that factoid from from the internet so we know it's true. As one of the 4 original provinces to join Confederation, New Brunswick joined the Dominion of Canada on July 1, 1867. Fredericton, previously known as Fort Nashwaak, Pointe-Sainte-Anne, and Frederick's Town, became the provincial capital. Although it was a small community at the time, It was an easy decision because the town had served as the capital of Acadia under the French, and as the seat of government for the colony of New Brunswick under British rule. The New Brunswick Legislature building was originally opened in 1788, but was destroyed by fire in 1880 and replaced in 1882. Fredericton is known for its spacious downtown with wide streets, thanks to the original street plan laid out in a detailed map in 1785.
#CanadaIsAwesome #History
https://thecanadianencyclopedia.ca/en/article/fredericton

#Mural on one of the building on Wincenty Pol Street in #Gliwice (Old Ironworks). Apparently relate to "#Jazz in Ruins".
https://www.openstreetmap.org/?mlat=50.29249&mlon=18.68629#map=14/50.29249/18.68629