Compute the convex hull of geometries

Returns the smallest convex polygon that contains each geometry.

Usage

ga_convex_hull(x)

Arguments

x

a GeoArrow geometry array

Value

a GeoArrow polygon array

References

ConvexHull

See also

Other boundary: ga_bounding_rect(), ga_concave_hull(), ga_extremes(), ga_minimum_rotated_rect()

Examples

fp <- system.file("shape/nc.shp", package = "sf")
nc <- as.data.frame(read_shapefile(fp))

# the hull fills in every concavity, so it is never smaller
head(as.vector(ga_unsigned_area(ga_convex_hull(nc$geometry))), 3)
#> [1] 0.12484563 0.07437819 0.15586877
head(as.vector(ga_unsigned_area(nc$geometry)), 3)
#> [1] 0.11428350 0.06139976 0.14301628