Read and project the core evacuation inputs

Usage

prepare_evac_inputs(
  hazard_zone,
  roads,
  dem,
  target_crs = NULL,
  hazard_as_polygon = TRUE,
  dissolve_hazard = TRUE,
  road_exclude = NULL
)

Arguments

hazard_zone: Hazard/inundation zone as a SpatRaster, SpatVector, or file path.
roads: Road/pathway network as a SpatVector or file path.
dem: Elevation raster as a SpatRaster or file path.
target_crs: Optional projected CRS in meters.
hazard_as_polygon: Logical. Convert raster hazard zones to polygons.
dissolve_hazard: Logical. Dissolve hazard polygon pieces.
road_exclude: Optional road exclusion list passed to clean_roads().

Value

A named list with hazard_zone, roads, and dem.

Examples

dem <- terra::rast(nrows = 5, ncols = 5, xmin = 0, xmax = 5, ymin = 0, ymax = 5,
  vals = 1, crs = "EPSG:3857")
hazard <- terra::as.polygons(dem, dissolve = TRUE)
roads <- terra::vect(matrix(c(0, 2.5, 5, 2.5), ncol = 2, byrow = TRUE),
  type = "lines", crs = "EPSG:3857")
inputs <- prepare_evac_inputs(hazard, roads, dem)
names(inputs)
#> [1] "hazard_zone" "roads"       "dem"         "target_crs"