rotate.polygon: Rotate polygon

In spatialEco: Spatial Analysis and Modelling Utilities

Rotate polygon

Description

rotates polygon by specified angle

Usage

rotate.polygon(
  p,
  angle = 45,
  sp = FALSE,
  anchor = c("center", "lower.left", "upper.right")
)

Arguments

p	A polygon object of sf or sp class
angle	Rotation angle in degrees
sp	(FALSE | TRUE) Output sp class object
anchor	Location to rotate polygon on options are "center", "lower.left" and "upper.right"

Details

The anchor is the location that the rotation is anchored to. The center is the centroid where the lower.left and upper.right are based on the min or max of the coordinates respectively.

Value

an sp or sf polygon object with rotated polygon

Examples

library(sf)
 
data(meuse, package = "sp")
  meuse <- st_as_sf(meuse, coords = c("x", "y"), 
                    crs = 28992, agr = "constant")
 
 e <- st_convex_hull(st_union(meuse))
   e30 <- rotate.polygon(e, angle=30)
 
 plot(e, main="rotated 30 degrees")
   plot(e30, add=TRUE)
 

spatialEco documentation built on Nov. 18, 2023, 1:13 a.m.