Aerosol retrieval over urban areas using spatial regression between V/NIR and MIR hyperion channels

2005 ◽  
Author(s):  
B. Gross ◽  
O. Ogunwuyi ◽  
F. Moshary ◽  
S. Ahmed ◽  
B. Cairns
Keyword(s):  
Urban Areas ◽  
Spatial Regression ◽  
Aerosol Retrieval

Aerosol retrieval over urban areas using spatial regression between V/NIR and MIR Hyperion channels

2004 ◽  
Author(s):  
Barry Gross ◽  
Oluwatosin Ogunwuyi ◽  
Fred Moshary ◽  
Samir Ahmed ◽  
Brian Cairns
Keyword(s):  
Urban Areas ◽  
Spatial Regression ◽  
Aerosol Retrieval

Spatiotemporal clustering, social inequities and the risk of leptospirosis in an endemic area of Brazil: a retrospective spatial modelling

2020 ◽  
Author(s):  
Katyucia O C de Souza ◽  
José Augusto P Góes ◽  
Matheus S Melo ◽  
Paula M G Leite ◽  
Lucas A Andrade ◽  
...  
Keyword(s):  
Urban Areas ◽  
Spatial Regression ◽  
Temporal Trends ◽  
Spatial Dynamics ◽  
Secondary Data ◽  
The State ◽  
Scan Statistics ◽  
Northeastern Brazil ◽  
Metropolitan Region ◽  
Social Inequities

Abstract Background Leptospirosis is an endemic disease in Brazil of social and economic relevance related to behavioural and socioenvironmental factors. This study aimed to analyse the spatiotemporal distribution of the incidence of leptospirosis and its association with social determinants in health in a state of northeastern Brazil. Methods An ecological study of temporal series with techniques of spatial analysis using secondary data of the cases of leptospirosis notified in the Information System of Notifiable Diseases of the state of Sergipe (2008–2017) was conducted. The analysis of temporal trends was performed using Poisson regression. Spatial analyses were performed using the Moran index, the local empirical Bayesian model, scan statistics and spatial regression. Results The incidence rate decreased from 3.66 to 1.44 cases per 100 000 inhabitants in 2008 and 2017, respectively. Leptospirosis was associated with social inequities, mostly affecting males aged 20–49 y living in urban areas. The space-time scan indicated the formation of a risk cluster in municipalities in the metropolitan region of the state. Conclusions The data indicated the persistence of leptospirosis transmission, maintaining a pattern of high endemicity in some municipalities associated with social inequities. The study showed the temporal and spatial dynamics of the disease to better target specific actions for prevention and control.

scholarly journals High-resolution aerosol retrieval over urban areas using sentinel-2 data

2021 ◽  
Vol 264 ◽  
pp. 105829
Author(s):  
Yue Yang ◽  
Yunping Chen ◽  
Kangzhuo Yang ◽  
Jan Cermak ◽  
Yan Chen
Keyword(s):  
High Resolution ◽  
Urban Areas ◽  
Aerosol Retrieval ◽  
Sentinel 2

MODIS aerosol retrieval over urban areas

2005 ◽  
Author(s):  
Barry Gross ◽  
Oluwatosin Ogunwuyi ◽  
Fred Moshary ◽  
Samir Ahmed ◽  
Brian Cairns
Keyword(s):  
Urban Areas ◽  
Aerosol Retrieval

scholarly journals Population Change and Its Driving Factors in Rural, Suburban, and Urban Areas of Wisconsin, USA, 1970–2000

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Guangqing Chi ◽  
Stephen J. Ventura
Keyword(s):  
Urban Areas ◽  
Population Change ◽  
Spatial Regression ◽  
Spillover Effects ◽  
Temporal Variations ◽  
Influential Factors ◽  
Natural Amenities ◽  
Regression Approach ◽  
Temporal And Spatial ◽  
Single Set

Population growth (or decline) is influenced by many factors that fall into the broad realms of demographic characteristics, socioeconomic conditions, transportation infrastructure, natural amenities, and land use and development across space and time. This paper adopts an integrated spatial regression approach to investigate the spatial and temporal variations of these factors' effects on population change. Specifically, we conduct the analysis at the minor civil division level in Wisconsin, USA, from 1970 to 2000. The results suggest that the factors have varying effects on population change over time and across rural, suburban, and urban areas. Their effects depend upon the general trend of population redistribution processes, local dynamics, and areal characteristics. Overall, a systematic examination of population change should consider a variety of factors, temporal and spatial variation of their effects, and spatial spillover effects. The examination should have the flexibility to identify and incorporate influential factors at a given point in time and space, not to adhere to a single set of drivers in all circumstances. The findings have important implications for population predictions used for local and regional planning.

A New Aerosol Retrieval Algorithm for Landsat 8 OLI Images over Urban Areas

2021 ◽  
Author(s):  
Yue Yang ◽  
Yunping Chen ◽  
Kangzhuo Yang ◽  
Yan Chen ◽  
Yuan Sun ◽  
...  
Keyword(s):  
Urban Areas ◽  
Retrieval Algorithm ◽  
Landsat 8 ◽  
Landsat 8 Oli ◽  
Aerosol Retrieval

scholarly journals Background Optical Depth Correction over Urban Areas to Improve Land Aerosol Retrieval from Himawari-8

2021 ◽  
Vol 893 (1) ◽  
pp. 012060
Author(s):  
Risyanto
Keyword(s):  
Optical Depth ◽  
Urban Areas ◽  
Specific Treatment ◽  
Complex Surface ◽  
Surface Reflectance ◽  
Clear Sky ◽  
Aerosol Retrieval ◽  
The Impact ◽  
Aerosol Types

Abstract A conventional clear-sky minimum reflectance method, which has been widely used for AOD retrieval from geostationary satellites, usually has less accuracy over urban than other land areas. Urban areas usually have more complex surface properties and various aerosol types from different emission sources. When the surface reflectance is calculated from the clear-sky minimum reflectance, background aerosol optical depth (BOD) is assumed to be closed to zero. This assumption generates larger surface reflectance which leads to underestimation of AOD retrieved. This study proposed a correction for BOD value to be applied for AOD retrieval primary over urban areas where the pollution or natural source aerosol is persistent for long term. The study area covers Indonesia’s land region, while for evaluating the impact of specific treatment over urban areas we used the AERONET data from Bandung, Pontianak, and Makassar sites. The comparison of AOD retrieved from modified BOD and the AERONET ground-based data showed that the corrected surface reflectance improved the accuracy of AOD in the three sites, with a correlation coefficient increased from 0.23 to 0.37 and the fraction of ‘good retrieval’ changed from 35% to 51%.

scholarly journals Urban Vitality, Urban Form, and Land Use: Their Relations within a Geographical Boundary for Walkers

2020 ◽  
Vol 12 (24) ◽  
pp. 10633
Author(s):  
Suji Kim
Keyword(s):  
Land Use ◽  
Urban Form ◽  
Urban Areas ◽  
Spatial Regression ◽  
Built Environments ◽  
Daily Lives ◽  
Explanatory Variables ◽  
Functional Forms ◽  
Geographical Boundary ◽  
The Right

The aim of this study was to exmine the influence of combined urban form and land use on the vibrancy in urban areas within a geographical boundary for walkers. A geographical boundary is defined as a block group surrounded by expressways and arterials, based on findings in previous studies. Spatial regression was performed with mobile signal data representing the degree of vitality within the defined areal unit as a dependent variable, and explanatory variables measured by urban form hierarchy were used to consider both natural and built environments. The outcome helps comprehend the physical and functional forms of vibrant neighborhood environments. The result implies the importance of highly desirable features for walking- or transit-friendly neighborhoods. It also indicates the right combination of land uses needed to support the daily lives of local residents: little lost space, short blocks, well-connected streets, short distances to transit stations, and proximity to essential facilities. This study suggests a new way of defining a spatial unit for vitality analysis and shows the critical roles of both natural and built environments in activating local vitality. These findings establish the groundwork for designing better neighborhoods, especially for an area composed of local streets and collector roads.

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