R Under development (unstable) (2024-02-20 r85959 ucrt) -- "Unsuffered Consequences" Copyright (C) 2024 The R Foundation for Statistical Computing Platform: x86_64-w64-mingw32/x64 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > suppressPackageStartupMessages(library(lwgeom)) > suppressPackageStartupMessages(library(sf)) > nc = st_read(system.file("gpkg/nc.gpkg", package="sf"), quiet = TRUE) > nc = st_transform(nc, 3857) > st_perimeter_lwgeom(nc)[1:5] Units: [m] [1] 176214.9 149265.4 199586.8 375137.8 263512.6 > st_perimeter_2d(nc)[1:5] Units: [m] [1] 176214.9 149265.4 199586.8 375137.8 263512.6 > > proc.time() user system elapsed 0.62 0.12 0.73