Multi-scale greenspace exposure

This dataset includes greenspace exposure assessments at country, state, and county scales. (1) Level0-country.shp: Country-level greenspace exposure assessment; (2) Level1-state.shp: State-level greenspace exposure assessment; (3) Level2-county.shp: County-level greenspace exposure assessment. Key attributes in the shapefile data: (1) GExpo100m: Greenspace exposure assessment using 100-m grid without considering nearby buffer zones; (2) GExpo500m: Greenspace exposure assessment using a 500-m buffer disance; (3) GExpo1km: Greenspace exposure assessment using a 1000-m buffer disance; (4) GExpo1500m: Greenspace exposure assessment using a 1500-m buffer disance; (5) GreenCover: Greenspace coverage assessment using a 500-m buffer disance; (6) GExpo_Cove: Difference between greenspace exposure assessment and greenspace coverage assessment using a 500-m buffer distance; (7) 1500_500Di: Different btweeen greenspace exposure assessments using 1500-m and 500-m buffer distances.