read.asciigrid

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read/write to/from (ESRI) asciigrid format

read/write to/from ESRI asciigrid format

Keywords
programming
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, ...)
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
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.

See Also

as.image.SpatialGridDataFrame, image

Aliases
  • read.asciigrid
  • write.asciigrid
Examples
x <- read.asciigrid(system.file("external/test.ag", package="sp")[1])
class(x)
image(x)
Documentation reproduced from package sp, version 1.2-2, License: GPL (>= 2)

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