Delineate the space surrounding a river

Usage

delineate_riverspace(
  river,
  occluders = NULL,
  density = 1/50,
  ray_num = 40,
  ray_length = 100
)

Arguments

river: List with river surface and centerline
occluders: Geometry of occluders
density: Density of viewpoints
ray_num: Number of rays as numeric vector of length one
ray_length: Length of rays in meters as numeric vector of length one

Value

Riverspace as object of class sf::sfc_POLYGON

Details

For riverspace delineation, OSM water polygons intersecting the river centerline are treated as part of the river, including connected water bodies such as lakes and reservoirs. Viewpoints are calculated from water edges where available, and from the river centerline when river surface polygons are missing or partial.

Examples

if (FALSE) { # interactive()
bucharest_osm <- get_osm_example_data()
delineate_riverspace(bucharest_osm$river_surface, bucharest_osm$buildings)
}