retrieve bbox from spatial data

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

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"

Value

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

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)
#>   min max
#> x   1   3
#> y   1   3

# data.frame
data(meuse.grid)
coordinates(meuse.grid) <- ~x+y
gridded(meuse.grid) <- TRUE
bbox(meuse.grid)
#>      min    max
#> x 178440 181560
#> y 329600 333760