| Number | Exposure metric | Land cover classes (NLCD values in parentheses) |
|---|---|---|
| 1 | Green1 | Includes the forest (values:41,42,43), shrubland (52), and herbaceous (71,72, 73) land covers |
| 2 | Green2 | Includes classes within Green1 as well as developed open spaces (21) |
| 3 | DHI | Developed high intensity land cover (24) |
| 4 | IMP | Percentage of impervious surface |
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