Remote sensing of diverse urban environments: From the single city to multiple cities

Chen, Gang; Zhou, Yuyu; Voogt, James A.; Stokes, Eleanor C.

doi:10.1016/j.rse.2024.114108

Cited by 4 publications

(2 citation statements)

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“…The World Cities Report 2022 reveals that urban areas already accommodate 55 % of the global population, and the figure is expected to grow to 68 % by 2050 (United Nations Human Settlements Programme, 2022). Under the background of advancing global urbanization, burgeoning populations pose challenges and opportunities to land-use efficiency, making vertical urban growth a critical land-use pattern (Chen et al, 2024;Chen et al, 2020). Various urban functions have also given rise to distinct 3-D spatial forms within cities (Demuzere et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

3D-GloBFP: the first global three-dimensional building footprint dataset

Che,

Li,

Liu

et al. 2024

Preprint

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Abstract. Understanding urban vertical structures, particularly building heights, is essential for examining the intricate interaction between humans and their environment. Such datasets are indispensable for a variety of applications, including climate modeling, energy consumption analysis, and socioeconomic activities. Despite the importance of this information, previous studies have primarily focused on estimating building heights regionally on a grid scale, often resulting in datasets with limited coverage or spatial resolution. This limitation hampers comprehensive global analyses and the ability to generate actionable insights on finer scales. In this study, we developed a global building height map (3D-GloBFP) at a building footprint scale by leveraging Earth Observation (EO) datasets and advanced machine learning techniques. Our approach integrated multisource remote sensing features and building morphology features to develop height estimation models using the eXtreme Gradient Boosting (XGBoost) regression method across diverse global regions. This methodology allowed us to estimate the heights of individual buildings worldwide, culminating in the creation of the first global three-dimensional (3-D) building footprints (3D-GloBFP). Our evaluation results show that the height estimation models perform exceptionally well on a worldwide scale, with R2 ranging from 0.66 to 0.96 and root mean square errors (RMSEs) ranging from 1.9 m to 14.6 m across 33 subregions. Comparisons with other datasets demonstrate that our 3D-GloBFP closely matches the distribution and spatial pattern of reference heights. Our derived 3-D global building footprint map shows a distinct spatial pattern of building heights across regions, countries, and cities, with building heights gradually decreasing from the city center to the surrounding rural areas. Furthermore, our findings indicate the disparities in built-up infrastructure (i.e., building volume) across different countries and cities. China is the country with the most intensive total built-up infrastructure (5.28×1011 m3, accounting for 23.9 % of the global total), followed by the United States (3.90×1011 m3, accounting for 17.6 % of the global total). Shanghai has the largest volume of built-up infrastructure (2.1×1010 m3) of all representative cities. The derived building-footprint scale height map (3D-GloBFP) reveals the significant heterogeneity of urban built-up environments, providing valuable insights for studies in urban socioeconomic dynamics and climatology. The 3D-GloBFP dataset is available at https://doi.org/10.5281/zenodo.11319913 (Building height of the Americas, Africa, and Oceania in 3D-GloBFP) (Che et al., 2024a), https://doi.org/10.5281/zenodo.11397015 (Building height of Asia in 3D-GloBFP) (Che et al., 2024b), and https://doi.org/10.5281/zenodo.11391077 (Building height of Europe in 3D-GloBFP) (Che et al., 2024c).

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Section: Introductionmentioning

confidence: 99%

3D-GloBFP: the first global three-dimensional building footprint dataset

Che,

Li,

Liu

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The first SUHI study using remote sensing via satellite was reported by Rao [ 19 ] over the east coast of the U.S. Reviews of the use of thermal remote sensing in UHI studies are provided by many previous studies, such as Voogt and Oke [ 20 ]; Weng [ 21 ]; Mirzaei and Haghighat [ 22 ]; Chen et al [ 23 ]; and Diem et al [ 24 ], which include discussions of current issues and future research directions. Such issues include the difficulty in obtaining steady satellite images from urban surfaces, with one of the sources of this issue being cloud cover.…”

Section: Introductionmentioning

confidence: 99%