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Variables Details
: (EM-891)
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EM Identity and Description
| EM-891 | |
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Document Author
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Ted R. Angradi, Jonathon J. Launspach, and Molly J. Wick |
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Document Year
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Variable General Info
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
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Variable ID
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21998 | 22011 | 21996 | 22004 | 22002 | 22007 | 22009 | 22000 |
| Walkability | hybridrec_d | Not reported | artificialshore_p | Imperv_p | PM10removed_p | ripariantree_p | Treecover_p | |
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Qualitative-Quantitative
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Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) |
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Cardinal-Ordinal
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Cardinal | Cardinal | Cardinal | Cardinal | Cardinal | Cardinal | Cardinal | Cardinal |
| unitless | count/km^2 | $ | m^2/person | % | % | % | % |
Variable Typology
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
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Predictor-Intermediate-Response
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Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
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Predictor Variable Type
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Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
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Response Variable Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Data Source/Type
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Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:https://www.walkscore.com/professional/research.php |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:Open Street map Hybrid recreation amenities density (Hybridrec_d). This metric was derived by summing the counts of polygons partially man made recreational or leisure amenities for which greenspace is likely to be a significant attribute. |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:US Census Bureau, American Community Survey https://www.census.gov/programs-surveys/acs/technical-documentation.html |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:EnviroAtlas |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:EnviroAtlas https://www.epa.gov/enviroatlas/enviroatlas-dynamic-data-matrix |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:EnviroAtlas |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:EnviroAtlas source |
Map or database (e.g., wide coverage, wide availability, measured or modeled) ?Comment:EnviroAtlas https://www.epa.gov/enviroatlas/enviroatlas-dynamic-data-matrix |
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Variable Classification Hierarchy
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6. Non-monetary Indicators of Human Demand, Use or Benefit of Ecosystem Goods and Services |
6. Non-monetary Indicators of Human Demand, Use or Benefit of Ecosystem Goods and Services |
7. Monetary Values |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
6. Non-monetary Indicators of Human Demand, Use or Benefit of Ecosystem Goods and Services |
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--Demand for or use of cultural services-Physical and intellectual interactions with ecosystem |
--Demand for or use of cultural services-Physical and intellectual interactions with ecosystem |
--Other, multiple, unspecified or unclear |
--Land use/land cover type or dominant habitat type |
--Land use/land cover type or dominant habitat type |
--Biological characteristics, processes or requirements of living ecosystem components |
--Land use/land cover type or dominant habitat type |
--Demand for or use of cultural services-Physical and intellectual interactions with ecosystem |
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----Physical use of land-/seascapes in different environmental settings |
----Physical use of land-/seascapes in different environmental settings |
----Other, multiple, unspecified or unclear |
----Other, multiple, unspecified or unclear |
----Biological characteristics, processes or requirements of flora and fungi |
----Other, multiple, unspecified or unclear |
----Experiential use of plants, animals and land-/seascapes in different environmental settings |
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------Trees or shrubs |
Variable Spatial Characteristics
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
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Spatial Extent Area
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1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. |
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Spatially Distributed?
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Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Observations Spatially Patterned?
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Yes | Yes | Yes | Yes | Yes | Yes | Not applicable | Yes |
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Spatial Grain Type
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Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Not applicable | Other (specify), for irregular (e.g., stream reach, lake basin) |
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Spatial Grain Size
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census tract |
census tract ?Comment:unclear on the grain size |
census tract | census tract |
census tract ?Comment:. |
census tract | Not applicable | census tract |
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Spatial Density
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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EnviroAtlas URL
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Enabling Conditions | GAP Ecological Systems |
Variable Temporal Characteristics
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
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Temporal Extent
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2020 | 2022 | 2015-2019 | 2008-2017 | 2008-2017 | 2009-2017 | 2008-2017 | 2008-2017 |
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Temporally Distributed?
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Not applicable | Not applicable | No | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Regular Temporal Grain?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Value
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Units
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Density
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Values
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
| Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | |
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Min Value
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Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported |
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Max Value
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Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported |
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Other Value Type
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Not applicable | Not applicable | Not applicable | Not reported | Not applicable | Not applicable | Not applicable | Not applicable |
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Other Value
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Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported | Not reported |
Variable Variability and Sensitivity
| Census tract walk score | Hybrid (seminatural) recreational or interactional amenity density | Median census tract household income in 2019 | Per capita tree cover in census tract | Percent impervious surface in census tract | Percent of particulate matter >2.5 microns and <10 microns removed annually by trees in the census tract | Percent tree cover in riparia within 50 m buffer in the census tract | Percent tree cover in the census tract | |
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Variability Expression Given?
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No | No | No | No | No | No | No | No |
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Variability Metric
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None | None | None | None | None | None | None | None |
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Variability Value
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None | None | None | None | None | None | None | None |
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Variability Units
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None | None | None | None | None | None | None | None |
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Resampling Used?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variability Expression Used in Modeling?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Operational Validation (Response Variables only)
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Variable ID
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Validated?
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Validation Approach (within, between, etc.)
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Validation Quality (Qual/Quant)
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Validation Method (Stat/Deviance)
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Validation Metric
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Validation Value
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Validation Units
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Use of Measured Response Data
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