bbox_poly: Bounding box polygon

In spatialEco: Spatial Analysis and Modelling Utilities

Bounding box polygon

Description

Creates a polygon from a vector or raster extent

Usage

bbox_poly(x)

Arguments

x	An sf or terra object or vector of bounding coordinates

Details

If not a spatial object, expected order of input for x is: xmin, ymin, xmax, ymax. Where; xmin, ymin and the coordinates of top left corner of the bounding box and xmax, ymax represent the bottom right corner. The maximum value of xmax is width of the extent while maximum value of ymax is the height of the extent.

Value

A single feature sf class polygon object

Author(s)

Jeffrey S. Evans <[e-mail]>

Examples

if(require(sp, quietly = TRUE)) {
library(terra)
library(sf)
  data(meuse, package = "sp")
  meuse <- st_as_sf(meuse, coords = c("x", "y"), crs = 28992, 
                    agr = "constant")

# raster (terra)
r <- rast(ext(meuse))
  r[] <- runif(ncell(r))
 crs(r) <- "epsg:28992"
e <- bbox_poly(r)

plot(r)
  plot(st_geometry(e), border="red", add=TRUE)

# extent vector
e <- bbox_poly(c(178605, 329714, 181390, 333611)) 
  plot(e)

# vector bounding box
e <- bbox_poly(meuse)

plot(st_geometry(meuse), pch=20)
  plot(st_geometry(e), add=TRUE)

} else { 
  cat("Please install sp package to run this example", "\n")
}

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