sp (version 0.9-4)

SpatialPoints: create objects of class SpatialPoints or SpatialPointsDataFrame

Description

create objects of class SpatialPoints-class or SpatialPointsDataFrame-class from coordinates, and from coordinates and data.frames

Usage

SpatialPoints(coords, proj4string=CRS(as.character(NA)))
SpatialPointsDataFrame(coords, data, coords.nrs = numeric(0), 
		proj4string = CRS(as.character(NA)), match.ID = TRUE)

Arguments

coords

numeric matrix or data.frame with coordinates (each row is a point); in case of SpatialPointsDataFrame an object of class SpatialPoints-class is also allowed

proj4string

projection string of class CRS-class

data

object of class data.frame; the number of rows in data should equal the number of points in the coords object

coords.nrs

numeric; if present, records the column positions where in data the coordinates were taken from (used by coordinates<-)

match.ID

logical; if TRUE AND coords has rownames (i.e., coerced to a matrix, dimnames(coords)[[2]] is not NULL), AND data has row.names (i.e. is a data.frame), then the SpatialPointsDataFrame object is formed by matching the row names of

Value

• SpatialPoints returns an object of class SpatialPoints; SpatialPointsDataFrame returns an object of class SpatialPointsDataFrame;

See Also

coordinates, SpatialPoints-class, SpatialPointsDataFrame-class