bbox function

retrieve bbox from spatial data

retrieves spatial bounding box from spatial data methods

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"

Returns

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)

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