This function calculates the area of polygons in a layer or sf object. Note: This function only works with proxy objects as it returns a numeric value to R.
Arguments
- proxy
A mapboxgl_proxy or maplibre_proxy object.
- layer_id
The ID of the layer or source containing the polygons (mutually exclusive with data).
- data
An sf object containing polygons (mutually exclusive with layer_id).
- input_id
Character string specifying the Shiny input ID suffix for storing the area result. Default is "turf_area_result". Result will be available as
input[[paste0(map_id, "_turf_", input_id)]].