This function creates a concave hull around a set of points. The result is added as a source to the map, which can then be styled using add_fill_layer(), etc.
Usage
turf_concave_hull(
map,
layer_id = NULL,
data = NULL,
coordinates = NULL,
max_edge = NULL,
units = "kilometers",
source_id,
input_id = NULL
)Arguments
- map
A mapboxgl, maplibre, mapboxgl_proxy, or maplibre_proxy object.
- layer_id
The ID of a layer or source containing points (mutually exclusive with data and coordinates).
- data
An sf object containing points (mutually exclusive with layer_id and coordinates).
- coordinates
A list of coordinate pairs list(c(lng,lat), c(lng,lat), ...) for multiple points (mutually exclusive with layer_id and data).
- max_edge
The maximum edge length for the concave hull. If NULL (default), an optimal value is calculated automatically.
- units
The units for max_edge. One of "meters", "kilometers", "miles", etc.
- source_id
The ID for the new source containing the concave hull. Required.
- input_id
Optional. Character string specifying the Shiny input ID suffix for storing results. If NULL (default), no input is registered. For proxy operations, the result will be available as
input[[paste0(map_id, "_turf_", input_id)]].