sp: disaggregate – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

disaggregate

disaggregate SpatialLines, SpatialLinesDataFrame, SpatialPolygons, or SpatialPolygonsDataFrame objects

Description

disaggregate SpatialLines, SpatialLinesDataFrame, SpatialPolygons, or SpatialPolygonsDataFrame objects, using functions from rgeos to handle polygon hole nesting

Usage

disaggregate(x, ...)

Arguments

`x`	object of class SpatialLines or SpatialPolygons
`...`	ignored

Value

object of class SpatialLines or SpatialPolygons, where groups of Line or Polygon are disaggregated to one Line per Lines, or one Polygon per Polygons, respectively.

Author(s)

Robert Hijmans, Edzer Pebesma

Examples

Sr1 = Polygon(cbind(c(2,4,4,1,2),c(2,3,5,4,2)), hole = FALSE)
Sr2 = Polygon(cbind(c(5,4,2,5),c(2,3,2,2)), hole = FALSE)
Sr3 = Polygon(cbind(c(4,4,5,10,4),c(5,3,2,5,5)), hole = FALSE)
Sr4 = Polygon(cbind(c(5,6,6,5,5),c(4,4,3,3,4)), hole = TRUE)

Srs1 = Polygons(list(Sr1, Sr2), "s1/2")
Srs3 = Polygons(list(Sr3, Sr4), "s3/4")
sp = SpatialPolygons(list(Srs1,Srs3), 1:2)
length(sp) ## [1] 2
length(disaggregate(sp)) ## [1] 3 

l1 = cbind(c(1,2,3),c(3,2,2))
l1a = cbind(l1[,1]+.05,l1[,2]+.05)
l2 = cbind(c(1,2,3),c(1,1.5,1))
Sl1 = Line(l1)
Sl1a = Line(l1a)
Sl2 = Line(l2)
S1 = Lines(list(Sl1, Sl1a), ID="a")
S2 = Lines(list(Sl2), ID="b")
sl = SpatialLines(list(S1,S2))
length(sl)
length(disaggregate(sl))

sp

Classes and Methods for Spatial Data

v1.4-5

GPL (>= 2)

Authors

Edzer Pebesma [aut, cre], Roger Bivand [aut], Barry Rowlingson [ctb], Virgilio Gomez-Rubio [ctb], Robert Hijmans [ctb], Michael Sumner [ctb], Don MacQueen [ctb], Jim Lemon [ctb], Finn Lindgren [ctb], Josh O'Brien [ctb], Joseph O'Rourke [ctb]

Initial release