rgeos: constructor-SpatialRings – R documentation

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rgeos

constructor-SpatialRings

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