constructor-SpatialRings: create SpatialRings or SpatialRingsDataFrame

In rgeos: Interface to Geometry Engine - Open Source ('GEOS')

create SpatialRings or SpatialRingsDataFrame

Description

create objects of class SpatialRings or SpatialRingsDataFrame

Usage

 
Ring(coords,ID=as.character(NA))
SpatialRings(RingList, proj4string=CRS(as.character(NA)))
SpatialRingsDataFrame(sr, data, match.ID = TRUE)

Arguments

coords	2-column numeric matrix with coordinates; first point (row) should equal last coordinates (row); if the hole argument is not given, the status of the polygon as a hole or an island will be taken from the ring direction, with clockwise meaning island, and counter-clockwise meaning hole
ID	character vector of length one with identifier
RingList	list with objects of class Ring-class
proj4string	Object of class "CRS" holding a valid proj4 string
sr	object of class SpatialRings-class
data	object of class data.frame; the number of rows in data should equal the number of Lines elements in sl
match.ID	logical: (default TRUE): match SpatialLines member Lines ID slot values with data frame row names, and re-order the data frame rows if necessary

Value

Ring returns object of class Ring SpatialRings returns object of class SpatialRings SpatialRingsDataFrame returns object of class SpatialRingsDataFrame

See Also

Ring-class SpatialRings-class SpatialRingsDataFrame-class

rgeos documentation built on July 9, 2023, 3:08 p.m.