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Larger Image PFTRAN9 - Percentage of watershed classified as transitional forest (9x9) Percentage of transitional forest is calculated using a moving 270 meter square window (9 pixels x 9 pixels) across the land cover. When the percent forest in the window is greater than 40%, but less than 60%, the forest cell in the center of the window is categorized as transitional. The number of transitional forest cells in the watershed is then divided by the watershed's total land area (the total number cells in the watershed minus those cells classified as water) to derive PFTRAN9. Transitional forest is unlikely to be connected across an area, although it is possible. It is also unlikely to provide interior habitat.

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