Get the coordinates of a vector type Spatial* object

Extract the coordinates of a Spatial object

# S4 method for class 'SpatialPolygons'
geom(x, sepNA=FALSE, ...)
# S4 method for class 'SpatialLines'
geom(x, sepNA=FALSE, ...)
# S4 method for class 'SpatialPoints'
geom(x, ...)
# S4 method for class 'data.frame'
geom(x, d, gt, crs, ...)

Arguments

x

SpatialPolygons*, SpatialLines*, or SpatialPoints* object; or a data.frame

sepNA

logical. If TRUE, geometries are separated by a row with NA values

...

additional arguments, none implemented

d

data.frame that matches the number of objects in data.frame x

gt

character. geometry type. Must be one of "polygons", "lines", "points"

crs

character. PROJ.4 crs string

Value

Matrix with 6, (5 SpatialLines), or 3 (SpatialPoints) columns. object (sequential object number) part (sequential part number within the object; not for SpatialPoints), cump (cumulative part number; not for SpatialPoints), hole (is this a hole or not; only for SpatialPolygons), x (x coordinate or longitude), y (y coordinate or latitude)

See also

coordinates, geometry

Examples

p <- readRDS(system.file("external/lux.rds", package="raster"))
x <- geom(p)
head(x)
#>      object part cump hole        x        y
#> [1,]      1    1    1    0 6.026519 50.17767
#> [2,]      1    1    1    0 6.031361 50.16563
#> [3,]      1    1    1    0 6.035646 50.16410
#> [4,]      1    1    1    0 6.042747 50.16157
#> [5,]      1    1    1    0 6.043894 50.16116
#> [6,]      1    1    1    0 6.048243 50.16008
  
# and back to a SpatialPolygonsDataFrame  
x <- data.frame(x)
sp <- as(x, "SpatialPolygons")
crs(sp) <- crs(p)
spdf <- SpatialPolygonsDataFrame(sp, data.frame(p), match.ID=FALSE)