assign_sites_to_lakes: Assign Sites to Lakes

In lakefetch: Calculate Fetch and Wave Exposure for Lake Sampling Points

Assign Sites to Lakes

Description

Perform spatial join to assign each site to its containing lake polygon.

Usage

assign_sites_to_lakes(sites_sf, water_polygons, tolerance_m = NULL)

Arguments

sites_sf	sf object with site points
water_polygons	sf object with lake polygons
tolerance_m	Buffer distance for matching sites near lake edges

Value

sf object with sites and added columns for lake_osm_id, lake_name, lake_area_km2

Examples

csv_path <- system.file("extdata", "sample_sites.csv", package = "lakefetch")
sites <- load_sites(csv_path)
lake_data <- get_lake_boundary(sites)

# Assign sites to their containing lakes
sites_assigned <- assign_sites_to_lakes(
  lake_data$sites,
  lake_data$all_lakes,
  tolerance_m = 50
)

# Check assignments
table(sites_assigned$lake_name)

lakefetch documentation built on March 20, 2026, 5:10 p.m.