Appendix 1. An example "recipe" used to generate a multicategory gradient landscape. This recipe produces a pair of gradients in 90-degree contention as seen in Fig. 8. There is also an option to wrap the landscape seamlessly from top to bottom and side to side, to form a continuous, edgeless torus.
N
N (visualize the landscape?)
7 (Number of levels)
2 (highest data category)
n (supply external prob maps?)
0.95 (value of H for level 1, category 0)
0.95 (value of H for level 2, category 0)
0.95 (value of H for level 3, category 0)
0.95 (value of H for level 4, category 0)
0.95 (value of H for level 5, category 0)
0.95 (value of H for level 6, category 0)
0.95 (value of H for level 7, category 0)
0.95 (value of H for level 1, category 1)
0.95 (value of H for level 2, category 1)
0.95 (value of H for level 3, category 1)
0.95 (value of H for level 4, category 1)
0.95 (value of H for level 5, category 1)
0.95 (value of H for level 6, category 1)
0.95 (value of H for level 7, category 1)
0.95 (value of H for level 1, category 2)
0.95 (value of H for level 2, category 2)
0.95 (value of H for level 3, category 2)
0.95 (value of H for level 4, category 2)
0.95 (value of H for level 5, category 2)
0.95 (value of H for level 6, category 2)
0.95 (value of H for level 7, category 2)
.30000 (probability of habitat type 1)
.30000 (probability of habitat type 2)
n (generate GRASS input file?)
y (xpm file of realized landscape?)
n (xpm file of probability landscapes?)
0.000000 (threshold for detection (xlow))
n (wrap?)
y (gradient?)
10
0
0
10
0.000000 (threshold for detection (xlow))
n (wrap?)
y (gradient?)
10
10
0
0