Class

Class for (irregularly spaced) MultiPoints

Objects from the Class

Objects can be created by calls of the form SpatialPoints(x).

Slots

coords:: Object of class "list", containing the coordinates of point sets (each list element is a matrix)
bbox:: Object of class "matrix", with bounding box
proj4string:: Object of class "CRS", projection string

Extends

Class "Spatial", directly.

Methods

[: signature(x = "SpatialMultiPoints"): subsets point sets
coerce: signature(from = "SpatialPoints", to = "data.frame"): coerce to data.frame
coordinates: signature(obj = "SpatialMultiPoints"): retrieves all the coordinates, as one single matrix
plot: signature(x = "SpatialPoints", y = "missing"): plot points
summary: signature(object = "SpatialPoints"): summarize object
points: signature(x = "SpatialPoints"): add point symbols to plot
show: signature(object = "SpatialPoints"): prints coordinates
rbind: signature(object = "SpatialPoints"): rbind-like method

plot method arguments

The plot method for “SpatialPoints” objects takes the following arguments:

x: object of class SpatialPoints
pch: default 3; either an integer specifying a symbol or a single character to be used as the default in plotting points
axes: default FALSE; a logical value indicating whether both axes should be drawn
add: default FALSE; add to existing plot
xlim: default NULL; the x limits (x1, x2) of the plot
ylim: default NULL; the y limits of the plot
...: passed through
setParUsrBB: default FALSE; set the par “usr” bounding box, see note in Spatial-class
cex: default 1; numerical value giving the amount by which plotting text and symbols should be magnified relative to the default
col: default 1; default plotting color
lwd: default 1; line width
bg: default 1; colour to be used for the background of the device region

Author

Edzer Pebesma, edzer.pebesma@uni-muenster.de

Examples

cl1 = cbind(rnorm(3, 10), rnorm(3, 10))
cl2 = cbind(rnorm(5, 10), rnorm(5,  0))
cl3 = cbind(rnorm(7,  0), rnorm(7, 10))

mp = SpatialMultiPoints(list(cl1, cl2, cl3))
plot(mp, col = 2, cex = 1, pch = 1:3)

mp
#> SpatialMultiPoints:
#> [[1]]
#>           [,1]      [,2]
#> [1,] 10.318447 10.357445
#> [2,]  9.285841 11.034092
#> [3,] 10.869094  9.571326
#> 
#> [[2]]
#>           [,1]        [,2]
#> [1,] 10.886738  1.42260893
#> [2,]  9.960896 -0.25811487
#> [3,] 12.213438  0.44084084
#> [4,]  9.768334  0.25428522
#> [5,]  9.015674 -0.02562433
#> 
#> [[3]]
#>             [,1]      [,2]
#> [1,] -0.43270350  9.755816
#> [2,]  0.52600028  9.437798
#> [3,]  0.59928980 10.184914
#> [4,] -0.09671730  9.569253
#> [5,]  1.84559013 11.478721
#> [6,] -0.02475524 11.857651
#> [7,]  0.61921071  8.134881
#> 
#> Coordinate Reference System (CRS) arguments: NA 
mp[1:2]
#> SpatialMultiPoints:
#> [[1]]
#>           [,1]      [,2]
#> [1,] 10.318447 10.357445
#> [2,]  9.285841 11.034092
#> [3,] 10.869094  9.571326
#> 
#> [[2]]
#>           [,1]        [,2]
#> [1,] 10.886738  1.42260893
#> [2,]  9.960896 -0.25811487
#> [3,] 12.213438  0.44084084
#> [4,]  9.768334  0.25428522
#> [5,]  9.015674 -0.02562433
#> 
#> Coordinate Reference System (CRS) arguments: NA 

print(mp, asWKT=TRUE, digits=3)
#> SpatialMultiPoints:
#>                                                                                        geometry
#> 1                                                      MULTIPOINT (10.3 10.4,9.29 11,10.9 9.57)
#> 2                         MULTIPOINT (10.9 1.42,9.96 -0.258,12.2 0.441,9.77 0.254,9.02 -0.0256)
#> 3 MULTIPOINT (-0.433 9.76,0.526 9.44,0.599 10.2,-0.0967 9.57,1.85 11.5,-0.0248 11.9,0.619 8.13)
#> Coordinate Reference System (CRS) arguments: NA

Class "SpatialMultiPoints"