turf_area: Calculate area of geometries

In mapgl: Interactive Maps with 'Mapbox GL JS' and 'MapLibre GL JS'

Calculate area of geometries

Description

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.

Usage

turf_area(proxy, layer_id = NULL, data = NULL, input_id = "turf_area_result")

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)]].

Value

The proxy object for method chaining.

mapgl documentation built on Aug. 18, 2025, 5:35 p.m.