Spatial-class: Class "Spatial"

Description

An abstract class from which useful spatial classes are derived

Spatial(bbox, proj4string = CRS(as.character(NA)))
# S3 method for Spatial
subset(x, subset, select, drop = FALSE, …)

are never to be generated; only derived classes can be meaningful

bbox:: Object of class "matrix"; 2-column matrix holding the minimum in first and maximum in second column for the x-coordinate (first row), y-coordinate (second row) and optionally, for points and grids only, further coordinates. The constructed Spatial object will be invalid if any bbox values are NA or infinite. The column names must be c("min", "max")
proj4string:: Object of class "CRS"; holding a valid proj4 string, which can be used for unprojecting or reprojecting coordinates; it is initialised to NA. Other strings are checked for validity in the rgdal package, but attempts to assign a string containing "longlat" to data extending beyond longitude [-180, 360] or lattitude [-90, 90] will be stopped or warned, use set_ll_warn to warn rather than stop, and set_ll_TOL to change the default tolerance for the range exceedance tests.

bbox: signature(obj = "Spatial"): retrieves the bbox element
dimensions: signature(obj = "Spatial"): retrieves the number of spatial dimensions spanned
gridded: signature(obj = "Spatial"): logical, tells whether the data is on a regular spatial grid
plot: signature(x = "Spatial", y = "missing"): plot method for spatial objects; does nothing but setting up a plotting region choosing a suitable aspect if not given(see below), colouring the plot background using either a bg= argument or par("bg"), and possibly drawing axes.
summary: signature(object = "Spatial"): summarize object
$: retrieves attribute column
$<-: sets or replaces attribute column, or promote a geometry-only object to an object having an attribute

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

x: object of class Spatial
xlim: default NULL; the x limits (x1, x2) of the plot
ylim: default NULL; the y limits of the plot
asp: default NA; the y/x aspect ratio
axes: default FALSE; a logical value indicating whether both axes should be drawn
bg: default par("bg"); colour to be used for the background of the device region
xaxs: The style of axis interval calculation to be used for the x-axis
yaxs: The style of axis interval calculation to be used for the y-axis
lab: A numerical vector of the form c(x, y, len) which modifies the default way that axes are annotated
setParUsrBB: default FALSE; set the par “usr” bounding box; see below
bgMap: object of class ggmap, or returned by function RgoogleMaps::GetMap
expandBB: numeric; factor to expand the plotting region default: bbox(x) with on each side (1=below, 2=left, 3=above and 4=right); defaults to c(0,0,0,0); setting xlim or ylim overrides this.
...: passed through

this class is not useful in itself, but all spatial classes in this package derive from it