Ring

SpatialRings

SpatialRingsDataFrame

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

coords

character vector of length one with identifier

list with objects of class <a rd-options="" href="/link/Ring-class?package=rgeos&version=0.5-1" data-mini-rdoc="rgeos::Ring-class">Ring-class</a>

RingList

Object of class <code>"CRS"</code> holding a valid proj4 string

proj4string

object of class <a rd-options="" href="/link/SpatialRings-class?package=rgeos&version=0.5-1" data-mini-rdoc="rgeos::SpatialRings-class">SpatialRings-class</a>

object of class <code>data.frame</code>; the number of rows in <code>data</code>
should equal the number of <code>Lines</code> elements in <code>sl</code>

data

logical: (default TRUE): match SpatialLines member Lines ID slot values with data frame row names, and re-order the data frame rows if necessary

match.ID

create objects of class <code>SpatialRings</code> or <code>SpatialRingsDataFrame</code>

manip

Interface to Geometry Engine - Open Source ('GEOS') using the C 'API' for topology operations on geometries. The 'GEOS' library is external to the package, and, when installing the package from source, must be correctly installed first. Windows and Mac Intel OS X binaries are provided on 'CRAN'. ('rgeos' >= 0.5-1): Up to and including 'GEOS' 3.7.1, topological operations succeeded with some invalid geometries for which the same operations fail from and including 'GEOS' 3.7.2. The 'checkValidity=' argument defaults and structure have been changed, from default FALSE to integer default '0L' for 'GEOS' < 3.7.2 (no check), '1L' 'GEOS' >= 3.7.2 (check and warn). A value of '2L' is also provided that may be used, assigned globally using 'set_RGEOS_CheckValidity(2L)', or locally using the 'checkValidity=2L' argument, to attempt zero-width buffer repair if invalid geometries are found. The previous default (FALSE, now '0L') is fastest and used for 'GEOS' < 3.7.2, but will not warn users of possible problems before the failure of topological operations that previously succeeded.

Roger Bivand

rgeos

Interface to Geometry Engine - Open Source ('GEOS')

Colin Rundel

Edzer Pebesma

Rainer Stuetz

Karl Ove Hufthammer

Patrick Giraudoux

Martin Davis

Sandro Santilli

SpatialRings function

list with objects of class <a rd-options='' href='Ring-class'>Ring-class</a>

object of class <a rd-options='' href='SpatialRings-class'>SpatialRings-class</a>

SpatialRings: create SpatialRings or SpatialRingsDataFrame

Description

Usage

Arguments

Value

See Also