Polygons-class

Collection of objects of class <code>"Polygon"</code>

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. From this
version, 'rgdal', 'maptools', and 'rgeos' are no longer used at all,
see <https://r-spatial.org/r/2023/05/15/evolution4.html> for details.

Edzer Pebesma

Classes and Methods for Spatial Data

Roger Bivand

Barry Rowlingson

Virgilio Gomez-Rubio

Robert Hijmans

Michael Sumner

Don MacQueen

Jim Lemon

Finn Lindgren

Josh O'Brien

Joseph O'Rourke

Patrick Hausmann

Polygons-class function

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

Objects from the Class

<dl>
 <dt><code>Polygons</code>:</dt>
<dd>Object of class <code>"list"</code>; list with objects
	of class Polygon-class</dd> <dt><code>plotOrder</code>:</dt>
<dd>Object of class <code>"integer"</code>; order in which
	the Polygon objects should be plotted, currently by order of decreasing size</dd> <dt><code>labpt</code>:</dt>
<dd>Object of class <code>"numeric"</code>; pair of x, y coordinates giving a label point, the label point of the largest polygon component</dd> <dt><code>ID</code>:</dt>
<dd>Object of class <code>"character"</code>; unique identifier string</dd> <dt><code>area</code>:</dt>
<dd>Object of class <code>"numeric"</code>; the gross total planar area of the Polygon list but not double-counting holes (changed from 0.9-58 - islands are summed, holes are ignored rather than subtracted); these values are used to make sure that polygons of a smaller area are plotted after polygons of a larger area, does not respect projection as objects of this class have no projection defined</dd> 
</dl>

Slots

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

Methods

Author

Class "Polygons" — Polygons-class

<dl>
 <dt><code>Polygons</code>:</dt>
<dd>Object of class <code>"list"</code>; list with objects
	of class Polygon-class</dd>

 <dt><code>plotOrder</code>:</dt>
<dd>Object of class <code>"integer"</code>; order in which
	the Polygon objects should be plotted, currently by order of decreasing size</dd>

 <dt><code>labpt</code>:</dt>
<dd>Object of class <code>"numeric"</code>; pair of x, y coordinates giving a label point, the label point of the largest polygon component</dd>

 <dt><code>ID</code>:</dt>
<dd>Object of class <code>"character"</code>; unique identifier string</dd>

 <dt><code>area</code>:</dt>
<dd>Object of class <code>"numeric"</code>; the gross total planar area of the Polygon list but not double-counting holes (changed from 0.9-58 - islands are summed, holes are ignored rather than subtracted); these values are used to make sure that polygons of a smaller area are plotted after polygons of a larger area, does not respect projection as objects of this class have no projection defined</dd>

 
</dl>

Polygons-class: Class "Polygons"

Description

Arguments

Objects from the Class

Slots

Methods

Author