sp (version 1.2-3)

disaggregate-methods: disaggregate SpatialLines, SpatialLinesDataFrame, SpatialPolygons, or SpatialPolygonsDataFrame objects

Description

disaggregate SpatialLines, SpatialLinesDataFrame, SpatialPolygons, or SpatialPolygonsDataFrame objects

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.

Examples

Run this code
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))

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