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=0.5-3" 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=0.5-3" 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. From 'GEOS' 3.8.0, repair of geometries may also be attempted using 'gMakeValid()', which may, however, return a collection of geometries of different types.

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