Accumulated cost surfaces — accumulated

The accumulated least cost from each site to every cell of the landscape. Corridors between two sites are built from the sum of their surfaces, so this is computed once per site and reused for every pair.

Usage

accumulated_cost(tr, sites, id = "site", filename = "")

Arguments

tr: A transition layer from make_transition().
sites: An sf object of points or polygons (polygon centroids are used) with an ID column.
id: Name of the ID column in sites.
filename: Optional GeoTIFF to write the surfaces to, which keeps memory use low for large landscapes.

Value

A multi-layer SpatRaster with one layer per site, named by site ID. Unreachable cells are NA.

Examples

# \donttest{
ex <- corridor_example()
tr <- make_transition(ex$resistance)
acc <- accumulated_cost(tr, ex$sites[1:3, ])
# }