unitless_measures: Unitless measures

In seasmith/sfx: Extra functions for Simple Features manipulation

Unitless measures

Description

Unitless measures

Usage

st_ul_area(x, ...)

st_ul_length(x)

st_ul_distance(
  x,
  y,
  ...,
  dist_fun,
  by_element = FALSE,
  which = ifelse(isTRUE(sf::st_is_longlat(x)), "Great Circle", "Euclidean"),
  par = 0,
  tolerance = 0
)

Arguments

x	object of class sf, sfc or sfg
...	ignored
y	object of class sf, sfc or sfg, defaults to x
dist_fun	deprecated
by_element	logical; if TRUE, return a vector with distance between the first elements of x and y, the second, etc. if FALSE, return the dense matrix with all pairwise distances.
which	character; for Cartesian coordinates only: one of Euclidean, Hausdorff or Frechet; for geodetic coordinates, great circle distances are computed; see details
par	for which equal to Hausdorff or Frechet, optionally use a value between 0 and 1 to densify the geometry
tolerance	ignored if st_is_longlat(x) is FALSE; otherwise, if set to a positive value, the first distance smaller than tolerance will be returned, and true distance may be smaller; this may speed up computation. In meters, or a units object convertible to meters.

Examples

suppressPackageStartupMessages(library(dplyr))
data(states_map)

states_map %>%
  filter(sfx::st_ul_area(states_map) > 250e9)

seasmith/sfx documentation built on April 1, 2024, 2:36 p.m.