Description Usage Arguments Value Author(s) See Also Examples
Creates a grid with given cell dimensions
1 2 | GRTS.polygon(spPolygon, cellsize, Subset = FALSE,
RandomStart = FALSE)
|
spPolygon |
A |
cellsize |
A single number defining the size of each grid cell. |
Subset |
A logical value indicating wether the
entire GRTS grid should be returned ( |
RandomStart |
A logical value indicating wether the
GRTS grid should start at the minimum of the coordinates
plus half the |
A SpatialGridDataFrame
if Subset == FALSE
or a SpatialPixelsDataFrame
if Subset ==
TRUE
. The variable Ranking
contains the
randomised order of the cells.
Thierry Onkelinx Thierry.Onkelinx@inbo.be, Paul Quataert
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | library(sp)
Sr1 = Polygon(cbind(c(2,4,4,1,2),c(2,3,5,4,2)))
Sr2 = Polygon(cbind(c(5,4,2,5),c(2,3,2,2)))
Sr3 = Polygon(cbind(c(4,4,5,10,4),c(5,3,2,5,5)))
Sr4 = Polygon(cbind(c(5,6,6,5,5),c(4,4,3,3,4)), hole = TRUE)
Srs1 = Polygons(list(Sr1), "s1")
Srs2 = Polygons(list(Sr2), "s2")
Srs3 = Polygons(list(Sr3, Sr4), "s3/4")
SpP = SpatialPolygons(list(Srs1,Srs2,Srs3), 1:3)
output <- GRTS(SpP, cellsize = 0.1)
spplot(output)
output <- GRTS(SpP, cellsize = 0.1, Subset = TRUE, RandomStart = TRUE)
spplot(output)
|
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