geom: Get the coordinates of a vector type Spatial* object

In raster: Geographic Data Analysis and Modeling

Description

Extract the coordinates of a Spatial object

Usage

## S4 method for signature 'SpatialPolygons'
geom(x, sepNA=FALSE, ...)
## S4 method for signature 'SpatialLines'
geom(x, sepNA=FALSE, ...)
## S4 method for signature 'SpatialPoints'
geom(x, ...)
## S4 method for signature '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)
	
# 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)

Example output

Loading required package: sp
     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

raster documentation built on Jan. 5, 2021, 3:01 a.m.