Class "SpatialPolygons"

Description

class to hold polygon topology (without attributes)

Objects from the Class

Objects can be created by calls to the function SpatialPolygons

Slots

polygons:

Object of class "list"; list elements are all of class Polygons-class

plotOrder:

Object of class "integer"; integer array giving the order in which objects should be plotted

bbox:

Object of class "matrix"; see Spatial-class

proj4string:

Object of class "CRS"; see CRS-class

Extends

Class "Spatial", directly.

Methods

Methods defined with class "SpatialPolygons" in the signature:

[

signature(obj = "SpatialPolygons"): select subset of (sets of) polygons; NAs are not permitted in the row index

plot

signature(x = "SpatialPolygons", y = "missing"): plot polygons in SpatialPolygons object

summary

signature(object = "SpatialPolygons"): summarize object

rbind

signature(object = "SpatialPolygons"): rbind-like method

Note

rbind calls the function SpatialPolygons, where it is checked that all IDs are unique. If rbind-ing SpatialPolygons without unique IDs, it is possible to set the argument makeUniqueIDs = TRUE, although it is preferred to change these explicitly with spChFIDs.

Author(s)

Roger Bivand

See Also

SpatialPolygons

Examples

grd <- GridTopology(c(1,1), c(1,1), c(10,10))
polys <- as.SpatialPolygons.GridTopology(grd)
plot(polys)
#text(coordinates(polys), labels=sapply(slot(polys, "polygons"), function(i) slot(i, "ID")), cex=0.6)
text(coordinates(polys), labels=row.names(polys))