SpatialPixelsDataFrame: define spatial grid with attribute data

Description

defines spatial grid by offset, cell size and dimensions

Usage

SpatialPixelsDataFrame(points, data, tolerance = sqrt(.Machine$double.eps), 
		proj4string = CRS(as.character(NA)), round = NULL, grid = NULL)
SpatialGridDataFrame(grid, data, proj4string = CRS(as.character(NA)))

Value

SpatialPixelsDataFrame returns an object of class SpatialPixelsDataFrame-class; SpatialGridDataFrame returns an object of class SpatialGridDataFrame-class.

Arguments

points: coordinates, either as numeric matrix or as object of class SpatialPoints-class
grid: grid topology; object of class GridTopology-class; for calls to SpatialPixelsDataFrame a value of NULL implies that this will be derived from the point coordinates
data: data.frame; contains the attribute (actual grid) data
tolerance: precision up to which extent points should be exactly on a grid
round: default NULL, otherwise a value passed to as the digits argument to round for setting cell size
proj4string: object of class CRS-class in the first form only used when points does not inherit from Spatial-class

Author

Edzer Pebesma

Description

Usage

Value

Arguments

Author

See Also