Polygon-class

classes

Classes and methods for spatial
data; the classes document where the spatial location information
resides, for 2D or 3D data. Utility functions are provided, e.g. for
plotting data as maps, spatial selection, as well as methods for
retrieving coordinates, for subsetting, print, summary, etc.

Edzer Pebesma

Classes and Methods for Spatial Data

Roger Bivand

Barry Rowlingson

Virgilio Gomez-Rubio

Robert Hijmans

Michael Sumner

Don MacQueen

Jim Lemon

Josh O'Brien

Polygon-class function

Objects can be created by calls to the function <code>Polygon</code>

Objects from the Class

<dl class="dl-horizontal">
 <dt><code>ringDir</code>:</dt><dd>Object of class <code>"integer"</code>; the ring direction of the ring (polygon) coordinates, holes are expected to be anti-clockwise</dd>
 <dt><code>labpt</code>:</dt><dd>Object of class <code>"numeric"</code>; an x, y coordinate pair forming the label point of the polygon</dd>
 <dt><code>area</code>:</dt><dd>Object of class <code>"numeric"</code>; the planar area of the polygon, does not respect projection as objects of this class have no projection defined</dd>
 <dt><code>hole</code>:</dt><dd>Object of class <code>"logical"</code>; does the polygon seem to be a hole</dd>
 <dt><code>coords</code>:</dt><dd>Object of class <code>"matrix"</code>; coordinates of the polygon;
	first point should equal the last point</dd>
 </dl>

Slots

Class <code>"Line"</code>, directly.

Extends

No methods defined with class "Polygon" in the signature.

Methods

Class "Polygon" — Polygon-class

<dl class='dl-horizontal'>
 <dt><code>ringDir</code>:</dt><dd>Object of class <code>"integer"</code>; the ring direction of the ring (polygon) coordinates, holes are expected to be anti-clockwise</dd>
 <dt><code>labpt</code>:</dt><dd>Object of class <code>"numeric"</code>; an x, y coordinate pair forming the label point of the polygon</dd>
 <dt><code>area</code>:</dt><dd>Object of class <code>"numeric"</code>; the planar area of the polygon, does not respect projection as objects of this class have no projection defined</dd>
 <dt><code>hole</code>:</dt><dd>Object of class <code>"logical"</code>; does the polygon seem to be a hole</dd>
 <dt><code>coords</code>:</dt><dd>Object of class <code>"matrix"</code>; coordinates of the polygon;
	first point should equal the last point</dd>
 </dl>

Polygon-class: Class "Polygon"

Description

Arguments

Objects from the Class

Slots

Extends

Methods

See Also