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NAME
r3.out.ascii - Converts a 3D raster map layer into an ASCII text file.
KEYWORDS
raster3d, voxel, export
SYNOPSIS
r3.out.ascii
r3.out.ascii help
r3.out.ascii [-hm] input=string [output=string] [dp=integer] [null=string] [--verbose] [--quiet]
Flags:
- -h
- Suppress printing of header information
- -m
- Use 3D raster mask (if exists) with input map
- --verbose
- Verbose module output
- --quiet
- Quiet module output
Parameters:
- input=string
- 3D raster map to be converted to ASCII
- output=string
- Name for ASCII output file
- dp=integer
- Number of decimal places for floats
- Options: 0-20
- Default: 8
- null=string
- Char string to represent no data cell
- Default: *
DESCRIPTION
Outputs 3D raster maps in ASCII format. The map parameter is
a valid 3D raster map in the current mapset search path. The output
parameter is the name of an ASCII file which will be written in the
current working directory.
If output is not specified then standard output (stdout) is used.
The -h flag may be used to suppress header information. The
module is sensitive to region settings (set with g.region).
NOTES
The default format for the ASCII file is equivalent to that required
by r3.in.ascii. In particular, files output by
r3.out.ascii with header information may be converted back to
3D raster maps with r3.in.ascii.
The format of the ASCII file is:
north: floating point
south: floating point
east: floating point
west: floating point
top: floating point
bottom: floating point
rows: integer
cols: integer
levels: integer
The header is followed by cell values in floating point format.
Cell values are output as a series of horizontal slices in row-major
order. That is,
(x, y, z) (x + 1, y, z) ... (x + cols, y, z)
(x, y + 1, z) (x + 1, y + 1, z) ... (x + cols, y + 1, z)
and so on.
One level maps can be imported with r.in.ascii (2D raster) after removing
the header lines "top", "bottom" and "levels".
SEE ALSO
r3.in.ascii,
g.region
AUTHORS
Roman Waupotitsch, Michael Shapiro,
Helena Mitasova, Bill Brown, Lubos Mitas, Jaro Hofierka
Last changed: $Date: 2011-09-13 13:13:36 -0700 (Tue, 13 Sep 2011) $
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