Extract Numeric Raster Values by Polygons

Extracts numeric raster values for each polygon in an sf object. Uses exactextractr to compute the weighted mean using the area of overlap.

Usage

extract_num_raster(spat_raster_multi, sf_hex_grid)

Arguments

spat_raster_multi

A SpatRaster object (single or multilayer numeric raster).

sf_hex_grid

An sf object with polygon geometries (e.g., H3 hexagons).

Value

An sf object with additional columns for each raster layer.

Examples

if (FALSE) { # \dontrun{
library(sf)
library(terra)
library(exactextractr)

r <- rast(system.file("raster/bio.tif", package = "spData"))
grid_sf <- get_h3_grid(st_as_sf(st_bbox(r)), resolution = 6)
result_sf <- extract_num_raster(r, grid_sf)
head(result_sf)
} # }