RgoogleMaps (version 1.2.0.6)

DF2SpatialPointsDataFrame: change data.frame to SpatialPointsDataFrame

Description

This function modifies an object of class data.frame to one of class SpatialPointsDataFrame

Usage

DF2SpatialPointsDataFrame(x, coords = c("x", "y"), crs = CRS("+init=epsg:28992"))

Arguments

x

data frame to be converted

coords

which columns are coordinates

crs

projection scheme

Value

• the new object of class SpatialPointsDataFrame

Examples

library(sp)

data("meuse", package = "sp", envir = environment())

meuseSP = DF2SpatialPointsDataFrame(meuse)



plot(meuseSP, asp = 1, cex = 4 * meuse$zinc/max(meuse$zinc),

     pch = 1, col = as.numeric(meuse$ffreq)+1 )

data("meuse.riv", package = "sp", envir = environment())

lines(meuse.riv)