bbox_sp: Bounding boxes as spatial objects

In kamapu/spatialist: Miscellaneous Spatial Functions

Description

Bounding boxes of raster (class Raster*) objects will be converted either to SpatialPointsDataFrame or SpatialPointsDataFrame.

This function extract the corners including the bounding box of the input raster or extension and writes either four spatial points or a rectangle as polygon.

Usage

bbox_sp(raster, ...)

## S4 method for signature 'Extent'
bbox_sp(raster, proj4 = "", geom = "point", ...)

## S4 method for signature 'RasterLayer'
bbox_sp(raster, geom = "point", ...)

## S4 method for signature 'RasterStack'
bbox_sp(raster, geom = "point", ...)

## S4 method for signature 'RasterBrick'
bbox_sp(raster, geom = "point", ...)

Arguments

raster	An object of class Raster* or Extent.
...	Further arguments passed among methods (not yet used).
proj4	Character vector indicating the proj4string (required only for inputs of class Extent).
geom	Character value indicating the geometry of output (either point or polygon).

Value

Either a SpatialPointsDataFrame or a SpatialPolygonsDataFrame object.

Author(s)

Lukas Trübenbach and Miguel Alvarez ([e-mail]).

Examples

require(raster)

r <- raster(system.file("external/test.grd", package="raster"))
plot(r)
plot(bbox_sp(r, "polygon"), border="darkgreen", lwd=3, add=TRUE)
plot(bbox_sp(r, "point"), col="red", pch=16, cex=3, add=TRUE)

kamapu/spatialist documentation built on April 13, 2021, 5:18 a.m.