geom function

Get the coordinates of a vector type Spatial* object

Extract the coordinates of a Spatial object methods

## 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

Returns

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)