sp (version 2.1-3)

read.asciigrid: read/write to/from (ESRI) asciigrid format

Description

read/write to/from ESRI asciigrid format

Usage

read.asciigrid(fname, as.image = FALSE, plot.image = FALSE, colname = fname,
 proj4string = CRS(as.character(NA)))
write.asciigrid(x, fname, attr = 1, na.value = -9999, ...)

Value

read.asciigrid returns the grid map read; either as an object of class SpatialGridDataFrame-class or, if as.image is TRUE, as list with components x, y and z.

Arguments

fname

file name

as.image

logical; if FALSE, a list is returned, ready to be shown with the image command; if FALSE an object of class SpatialGridDataFrame-class is returned

plot.image

logical; if TRUE, an image of the map is plotted

colname

alternative name for data column if not file name

proj4string

A CRS object setting the projection arguments of the Spatial Grid returned

x

object of class SpatialGridDataFrame

attr

attribute column; if missing, the first column is taken; a name or a column number may be given

na.value

numeric; value given to missing valued cells in the resulting map

...

arguments passed to write.table, which is used to write the numeric data

Author

Edzer Pebesma

See Also

as.image.SpatialGridDataFrame, image

Examples

x <- read.asciigrid(system.file("external/test.ag", package="sp")[1])
class(x)
image(x)