Scale effects in remotely sensed greenspace metrics and how to mitigate them for environmental health exposure assessment

Labib, S.M.; Lindley, Sarah; Huck, Jonny

doi:10.1016/j.compenvurbsys.2020.101501

Cited by 51 publications

(40 citation statements)

References 78 publications

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“…However, this cartographic representation unit (number of infected per 3-has grid) has serious limitations in terms of accuracy, and it also introduces the so-called Modifiable Areal Unit Problem (MAUP) described by Openshaw [ 41 ]. According to the MAUP, one variable presents unstable results depending on the scale of representation [ 52 ]. Despite its limitations, the regular grid is being used as a unit of maximum accuracy to publish official maps of infected individuals (in many cases, misnamed as risk maps) in some Spanish autonomous communities, such as Catalonia.…”

Section: Resultsmentioning

confidence: 99%

The Neighborhood Contagion Focus as a Spatial Unit for Diagnosis and Epidemiological Action against COVID-19 Contagion in Urban Spaces: A Methodological Proposal for Its Detection and Delimitation

Perles

Sortino

Mérida

2021

IJERPH

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The concept of neighborhood contagion focus is defined and justified as a basic spatial unit for epidemiological diagnosis and action, and a specific methodological procedure is provided to detect and map focuses and micro-focuses of contagion without using regular or artificial spatial units. The starting hypothesis is that the contagion in urban spaces manifests unevenly in the form of clusters of cases that are generated and developed by neighborhood contagion. Methodologically, the spatial distribution of those infected in the study area, the city of Málaga (Spain), is firstly analyzed from the disaggregated and anonymous address information. After defining the concept of neighborhood contagion focus and justifying its morphological parameters, a method to detect and map neighborhood contagion focus in urban settings is proposed and applied to the study case. As the main results, the existence of focuses and micro-focuses in the spatial pattern of contagion is verified. Focuses are considered as an ideal spatial analysis unit, and the advantages and potentialities of the use of mapping focus as a useful tool for health and territorial management in different phases of the epidemic are shown.

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Section: Resultsmentioning

confidence: 99%

The Neighborhood Contagion Focus as a Spatial Unit for Diagnosis and Epidemiological Action against COVID-19 Contagion in Urban Spaces: A Methodological Proposal for Its Detection and Delimitation

Perles

Sortino

Mérida

2021

IJERPH

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“…Studies focused on mental health were reported to employ smaller buffer distances, compared to physical health research [ 26 ]. There is no consensus to what buffer distance is optimal to define the exposure area [ 27 ]. According to the results of this review, a distance between 300 and 1600 m is suggested for future adolescents’ mental well-being related research.…”

Section: Discussionmentioning

confidence: 99%

“…One is the zoning effect, which implies that drawing the boundaries of geographical areas differently at the same scale may lead to different results. The other is the scale effect, which may produce different results when utilising differently sized geographical areas [ 27 , 78 , 79 ]. Two studies employed new technology such as GPS tracking, which offers an opportunity to examine in detail surrounding green space and represent adolescents’ true activity space that exerts contextual influence on mental well-being [ 28 , 29 ].…”

Section: Discussionmentioning

confidence: 99%

“…The first is assessments of availability, accessibility and visibility of exposure by how much green space there is in, close/access to, or can be seen from a specific location or area (e.g., home address, activity space) [ 24 , 25 , 26 ]. The green space metrics of this approach, such as Normalized Difference Vegetation Index (NDVI), percentage of green cover, are generally extracted from remote sensing image, land cover map and Google street view [ 27 , 28 ]. The second category is implementations of real time global positioning system (GPS) technology and geographic simulation to provide participants’ daily locations and movement patterns [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

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The Association between Green Space and Adolescents’ Mental Well-Being: A Systematic Review

Zhang

Mavoa

Zhao

et al. 2020

IJERPH

124

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This systematic review summarised and evaluated the evidence for associations between green space and adolescents’ mental well-being. The PRISMA statement guidelines were followed for reporting systematic reviews. Fourteen articles met the inclusion criteria for this review. Synthesis suggests beneficial associations between green space exposure and reduced stress, positive mood, less depressive symptoms, better emotional well-being, improved mental health and behaviour, and decreased psychological distress in adolescents. Several studies found the relationship varied by demographic and socio-economic factors. The limited number of studies and the risk of bias were the main limitations, together with heterogeneity regarding green space and mental well-being assessments. Overall, this review highlights the potential contribution of green space in schoolyards. Improving the availability, accessibility and quality of green space is likely to generate positive impacts on adolescents’ mental well-being. More consistent evidence on the use of different types of green space and perceptions of features are needed in the future.

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“…Esta alteración es conocida como el Problema de la Unidad Espacial Modificable (PUEM) (Openshaw, 1984). De acuerdo al PUEM, cuando un evento geográfico continuo es representado mediante unidades artificialmente creadas como las secciones censales o los municipios, el tamaño del área, la configuración de su forma y, especialmente la escala, pueden ofrecer diferentes resultados, y diferentes interpretaciones (Labib, Lindley & Huck, 2020).…”

Section: Introductionunclassified

Nuevas perspectivas sobre el Problema de la Unidad Espacial Modificable (PUEM) en relación con la representación cartográfica de enfermedades raras

Sánchez-Díaz

Alonso-Ferreira

Paz

et al. 2020

Ingeo

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En el marco del análisis espacio-temporal de la Enfermedades Raras (ER) en España, los efectos derivados del Problema de la Unidad Espacial Modificable (PUEM) condicionan la interpretación de los resultados. Este estudio tiene como objetivo comparar indicadores de mortalidad y visualización cartográfica para recomendar la unidad geográfica de trabajo óptima según población, área cubierta y el número de casos de la enfermedad. Se estudiaron los fallecimientos debidos a una ER (Huntington) en tres niveles de agregación espacial; el municipio, la comarca y la provincia. Se diseñó una ratio de adyacencia para observar el efecto de las relaciones de vecindad entre las tres unidades administrativas tratadas. Se calcularon indicadores epidemiológicos de mortalidad, así como indicadores locales de asociación espacial en cada nivel de agregación. Los resultados se representaron cartográficamente utilizando intervalos definidos por el usuario para comparar de forma visual las diferencias estadísticas y cartográficas. El PUEM fue particularmente visible trabajando con datos agregados de ER. Las comarcas representaron el mayor nivel de estabilidad en la ratio de adyacencia así como la unidad geográfica óptima en términos de resolución espacial y variabilidad de la información representada cartográficamente. Este proceso de ayuda en la elección de la escala de trabajo puede ser extrapolado a otras enfermedades o niveles de agregación, como paso previo a análisis epidemiológicos más avanzados.

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Scale effects in remotely sensed greenspace metrics and how to mitigate them for environmental health exposure assessment

Cited by 51 publications

References 78 publications

The Neighborhood Contagion Focus as a Spatial Unit for Diagnosis and Epidemiological Action against COVID-19 Contagion in Urban Spaces: A Methodological Proposal for Its Detection and Delimitation

The Neighborhood Contagion Focus as a Spatial Unit for Diagnosis and Epidemiological Action against COVID-19 Contagion in Urban Spaces: A Methodological Proposal for Its Detection and Delimitation

The Association between Green Space and Adolescents’ Mental Well-Being: A Systematic Review

Nuevas perspectivas sobre el Problema de la Unidad Espacial Modificable (PUEM) en relación con la representación cartográfica de enfermedades raras

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