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Methods for retrieving the geometry from a composite (geometry + attributes) object

geometry-methods.Rd

geometry retrieves the SpatialXxx object from a SpatialXxxDataFrame object, with Xxx Lines, Points, Polygons, Grid, or Pixels. geometry<- converts a data.frame into a Spatial object.

Usage

geometry(obj) 
geometry(obj) <- value

Arguments

obj

in case of assignment, a data.frame, else an object of class Spatial

value

object of class Spatial

Methods

obj = "Spatial"

obj = "SpatialPointsDataFrame"

obj = "SpatialMultiPointsDataFrame"

obj = "SpatialPolygonsDataFrame"

obj = "SpatialPixelsDataFrame"

obj = "SpatialGridDataFrame"

obj = "SpatialLinesDataFrame"

Author

Edzer Pebesma, edzer.pebesma@uni-muenster.de

Examples

data(meuse)
m = meuse
coordinates(m) = meuse[, c("x", "y")]
pts = geometry(m)
class(pts)
#> [1] "SpatialPoints"
#> attr(,"package")
#> [1] "sp"
geometry(meuse) = pts
class(meuse)
#> [1] "SpatialPointsDataFrame"
#> attr(,"package")
#> [1] "sp"
identical(m, meuse) # TRUE
#> [1] TRUE