Transition layer from a resistance surface

Builds the gdistance transition (conductance) layer used for least cost paths and corridors. Conductance between neighboring cells is the inverse of their mean resistance, corrected for diagonal steps. Cells at or above barrier (for example ridgelines scored as impassable) and NA cells cannot be crossed.

Usage

make_transition(resistance, barrier = NULL, directions = 8)

Arguments

resistance

A single-layer SpatRaster (or RasterLayer) of resistance values, in a projected coordinate system with units of meters.

barrier

Resistance at or above which a cell is a barrier. NULL for none.

directions

4, 8 or 16 neighbors.

Value

A TransitionLayer.

Examples

# \donttest{
ex <- corridor_example()
tr <- make_transition(ex$resistance)
# }