fill_holes: Fill small holes in polygons

In smoothr: Smooth and Tidy Spatial Features

Fill small holes in polygons

Description

Fill polygon holes that fall below a given area threshold.

Usage

fill_holes(x, threshold)

Arguments

x	spatial features; lines or polygons from either the sf, sp, or terra packages.
threshold	an area threshold, below which holes will be removed. Provided either as a units object (see units::set_units()), or a numeric threshold in the units of the coordinate reference system. If x is in unprojected coordinates, a numeric threshold is assumed to be in square meters. A threshold of 0 will return the input polygons unchanged.

Value

A spatial feature, with holes filled, in the same format as the input data.

Examples

# fill holes smaller than 1000km2
p <- jagged_polygons$geometry[5]
area_thresh <- units::set_units(1000, km^2)
p_dropped <- fill_holes(p, threshold = area_thresh)
# plot
par(mar = c(0, 0, 1, 0), mfrow = c(1, 2))
plot(p, col = "black", main = "Original")
plot(p_dropped, col = "black", main = "After fill_holes()")

smoothr documentation built on March 31, 2023, 11:45 p.m.