International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2024, Volume and Issue: 133, P. 104136 - 104136
Published: Sept. 1, 2024
Language: Английский
International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2023, Volume and Issue: 117, P. 103213 - 103213
Published: Jan. 29, 2023
Building heights are one of the crucial data for comprehending functions urban systems. Employing optical remote sensing imagery, shadow-based method is most promising methods which have been proposed estimating building height. However, existing studies height estimation restricted to a small area due lack annotations and ignorance azimuth variations. The Ice, Cloud, Land Elevation Satellite-2 (ICESat-2) allows large-scale retrieval in along-track direction thus can be taken as ground truth support algorithms extraction. Here, we an approach extracting by combining Google Earth Satellite (GES) images ICESat-2 photons. shadow instances were first extracted using U-Net deep learning framework. Based on retrieved from photons, improved model minimizing global error across all sample buildings was developed. A typical located city center Shanghai, China with around 90 km2 selected validate method. In total 15,966 successfully results indicated that estimated high accuracy absolute mean 4.08 m. Moreover, shows better performance compared datasets. holds great potential building-level contributes further morphologies.
Language: Английский
Citations
31
Remote Sensing of Environment, Journal Year: 2024, Volume and Issue: 305, P. 114079 - 114079
Published: Feb. 29, 2024
The Sustainable Development Goals Satellite 1 (SDGSAT-1), equipped with the Glimmer Imager (GLI), provides high-resolution nighttime light (NTL) data across multiple spectral bands, potentially facilitating monitoring of sustainable development goals (SDGs). This study developed a denoising algorithm for multispectral SDGSAT-1 GLI and demonstrated that its capacity allows measurement SDG indicators 7.1.1, 11.5.2, achievement target 7.3. results indicate (1) can effectively remove strips salt-and-pepper noise from images, residual significantly reduced almost little information loss. (2) accurately identify electrified areas at finer spatial scale calculating Indicator compared to traditional NASA's Black Marble Product. findings show highly urbanized cities exhibit greater proportion their population access electricity than underdeveloped cities. (3) proficiently estimates economic losses resulting non-natural disasters 11.5.2. Changes in NTL intensity strongly correlate pandemic-induced losses, an R2 exceeding 0.8. (4) When measuring Target 7.3 achievement, bands classify streetlight types into light-emitting diode high-pressure sodium lamps acceptable overall accuracy (89.9%). Sequentially, classification shows Shanghai achieved 13.09% energy-saving benefit. Overall, by leveraging high resolution, spectra, appropriate satellite overpass times GLI, estimated this outperform those based on products, have potential serve as direct source or reference factor estimating least 11 indicators.
Language: Английский
Citations
15
Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 378, P. 124735 - 124735
Published: March 3, 2025
Language: Английский
Citations
1
International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2023, Volume and Issue: 124, P. 103495 - 103495
Published: Sept. 20, 2023
The comprehensive characterization of global urbanization requires consideration both human activities and urban physical structures. Both structures exhibit regular self-similar patterns, yet the spatial patterns between two at a scale remain elusive. This study utilized NPP-VIIRS annual composite data newly available world settlement footprint 3D to investigate relationships nighttime light intensity building morphological indicators across several scales. Our results demonstrated that there is weak association morphology pixel level, as shown by maximum correlation coefficient approximately 0.4, but strong provincial/state level with over 0.8. Additionally, we performed an urban-rural gradient analysis evaluate indicators. indicated dominant gradients for morphologies follow declining trend from centers rural areas. Notably, inconsistencies were found predominantly in Africa. findings also suggested can be served indicator urbanization, thus provide implications facilitating solutions aimed reducing income disparity promoting sustainable development.
Language: Английский
Citations
18
IEEE Geoscience and Remote Sensing Magazine, Journal Year: 2024, Volume and Issue: 12(1), P. 108 - 137
Published: Jan. 4, 2024
Urban studies require a rich set of information sources and techniques that enable comprehensive depiction urban environments. Remote sensing captures physical characteristics landscapes, while social collects data from media digital devices to reflect human activities. The combination remote has been employed investigate environments, dynamics, the well-being city residents. This review explores leading ideas methodologies synergy between in broad context studies. involves leveraging benefits gain deeper understanding than can be acquired through any single approach. Two types are identified, namely, "transfer-based synergy" "integration-based synergy." former transfers based on their similarity. latter integrates these ways complementary advantages. motivations methods summarized show how such is suited for investigating complex nature systems. Typical applications include land use functional zone mapping, special identification, estimation natural socioeconomic elements, emergency response. We also identify quality issues, refinement methodologies, expansion still pose challenges worth future research. lays foundation synergizing sensing, offering researchers guidance reexamine reconceptualize multiple perspectives.
Language: Английский
Citations
8
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 914, P. 169901 - 169901
Published: Jan. 4, 2024
Language: Английский
Citations
8
Remote Sensing of Environment, Journal Year: 2024, Volume and Issue: 315, P. 114448 - 114448
Published: Oct. 1, 2024
Language: Английский
Citations
7
The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169499 - 169499
Published: Dec. 19, 2023
Language: Английский
Citations
15
Cities, Journal Year: 2024, Volume and Issue: 148, P. 104861 - 104861
Published: Feb. 8, 2024
Most urban land use studies lack dynamic analyses and precise temporal resolutions of use. To address this issue, our study introduces a model that incorporates eight indicators function, capturing intensity shifts every 15 min. We establish method for computing these using data. Our has notably enhanced resolution, provides detailed service depictions, integrates real-world attributes, such as building size type. This allows harmonious comparisons between human activity data static functional areas. novel the validation comparison results addresses evaluations in studies. extensive analysis reveals following significant findings: 1) Certain regions near Beijing's Third Ring Road show variable potential nighttime economic development. 2) Daytime high morning peak social concentrations, whereas evening peaks manifest dispersed—albeit intense—residential 3) Mixed does not guarantee consistent daily activities; however, proximity to multiple train stations intensifies diverse activities, leading heightened mixed Overall, robust dataset management facilitates greenhouse-gas emissions vitality, among other research topics.
Language: Английский
Citations
5
Sustainable Cities and Society, Journal Year: 2024, Volume and Issue: 105, P. 105318 - 105318
Published: Feb. 27, 2024
Language: Английский
Citations
5