Table 2. Number of hexagons distributed among the six exclusion categories. Values are counts of map hexagons per category (diagonal) and counts of hexagons with overlap between category pairs (off-diagonal). Of the 5268 excluded hexagons, 952 are identified by two overlapping categories, 352 by three overlapping categories, and 18 by four overlapping categories. Categories: water = ≥ 50% surface water cover (lake or large river); slope = 50% of topography with slope ≥ 15%; protected = contains ≥ 50% cover by areas (private or public) managed for conservation or public use; wetland = contains ≥ 50% cover by mapped wetland (≥ 5 ha); roadless = 0 km of mapped roads; streams = contains ≥ 1 km of streams designated high quality (New York Class AA or A, Pennsylvania Class EV or HQ-CWF). (For sources, see Methods: Selection criteria for conservation vulnerability models).


Wetland Water Protected Slope Streams Roadless
Wetland 46
Water 7 411
Protected 6 31 1457
Slope 0 18 591 2882
Streams 2 278 85 255 1563
Roadless 7 69 308 361 98 619