.TH r.out.arc 1grass "" "GRASS 6.4.4" "Grass User's Manual"
.SH NAME
\fI\fBr.out.arc\fR\fR  - Converts a raster map layer into an ESRI ARCGRID file.
.SH KEYWORDS
raster, export
.SH SYNOPSIS
\fBr.out.arc\fR
.br
\fBr.out.arc help\fR
.br
\fBr.out.arc\fR [\-\fBh1c\fR] \fBinput\fR=\fIname\fR \fBoutput\fR=\fIname\fR  [\fBdp\fR=\fIinteger\fR]   [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR] 
.SS Flags:
.IP "\fB\-h\fR" 4m
.br
Suppress printing of header information
.IP "\fB\-1\fR" 4m
.br
List one entry per line instead of full row
.IP "\fB\-c\fR" 4m
.br
Use cell center reference in header instead of cell corner
.IP "\fB\-\-verbose\fR" 4m
.br
Verbose module output
.IP "\fB\-\-quiet\fR" 4m
.br
Quiet module output
.PP
.SS Parameters:
.IP "\fBinput\fR=\fIname\fR" 4m
.br
Name of input raster map
.IP "\fBoutput\fR=\fIname\fR" 4m
.br
Name for output ARC-GRID map (use out=- for stdout)
.IP "\fBdp\fR=\fIinteger\fR" 4m
.br
Number of decimal places
.br
Default: \fI8\fR
.PP
.SH DESCRIPTION
\fIr.out.arc\fR converts a user-specified raster map layer
(\fBinput=\fR\fIname\fR) into an ESRI ARC-GRID ascii file
(\fBoutput=\fR\fIname\fR) suitable for export to other computer systems. 
The dp=\fIvalue\fR option (where \fIvalue\fR is a number of the user's
choice) can be used to request that numbers after decimal points are
limited.  However, to use this, the user should know the maximum number of
digits that will occur in the output file.  The user can find the maximum
number of digits occurring in the output file by running \fIr.out.arc\fR
without the \fBdp=\fR\fIvalue\fR option.
.PP
The GRASS program \fIr.in.arc\fR can be used
to perform the reverse function, converting an ESRI ARC-GRID ascii file in
suitable format to GRASS raster map format. The order of cell values in
file is from lower left to upper right (reverse to GRASS).
.SH NOTES
The output from \fIr.out.arc\fR may also be placed into a file
by using the UNIX redirection mechanism;  e.g.:
\fC
.DS
.br
r.out.arc input=soils output=- > out.grd
.br
.DE
\fR
The output file \fIout.grd\fR can then be copied
onto a CDROM or floppy disk for export purposes.
.PP
.br
An Arc ASCII grid can be loaded into ArcGIS 8.3 though ArcToolbox.
.br
Use the "Import to Raster" -> "ASCII to Grid" tool to create a binary grid 
which can be selected using ArcCatalog. The spatial analyst extension may 
need to be installed and activated within Arc.
.PP
In ArcGIS 9.0 the import tool can be found at:
.br
ArcMap -> Toolbox -> Conversion Tools -> To Raster -> ASCII to Raster
.PP
A GeoTIFF created with \fIr.out.gdal\fR is
sometimes a better solution for transferring raster maps to other GIS software.
.PP
.SH SEE ALSO
\fIr.in.arc\fR
.br
\fIr.out.gdal\fR
.br
.SH AUTHOR
Markus Neteler, University of Hannover, Germany, 
.br
based on r.out.ascii written by 
.br
Michael Shapiro,
U.S.Army Construction Engineering Research Laboratory
.PP
\fILast changed: $Date: 2008-05-16 21:09:06 +0200 (Fri, 16 May 2008) $\fR
.PP
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.PP
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