bbox: retrieve bbox from spatial data

In sp: Classes and Methods for Spatial Data

retrieve bbox from spatial data

Description

retrieves spatial bounding box from spatial data

Usage

	bbox(obj)

Arguments

obj	object deriving from class "Spatial", or one of classes: "Line", "Lines", "Polygon" or "Polygons", or ANY, which requires obj to be an array with at least two columns

Value

two-column matrix; the first column has the minimum, the second the maximum values; rows represent the spatial dimensions

Methods

obj = "Spatial"

object deriving from class "Spatial"

obj = "ANY"

an array with at least two columns

obj = "Line"

object deriving from class "Line"

obj = "Lines"

object deriving from class "Lines"

obj = "Polygon"

object deriving from class "Polygon"

obj = "Polygons"

object deriving from class "Polygons"

Examples

# just 9 points on a grid:
x <- c(1,1,1,2,2,2,3,3,3)
y <- c(1,2,3,1,2,3,1,2,3)
xy <- cbind(x,y)
S <- SpatialPoints(xy)
bbox(S)

# data.frame
data(meuse.grid)
coordinates(meuse.grid) <- ~x+y
gridded(meuse.grid) <- TRUE
bbox(meuse.grid)

sp documentation built on May 29, 2024, 5:33 a.m.