.TH r3.null 1grass "" "GRASS 6.4.4" "Grass User's Manual"
.SH NAME
\fI\fBr3.null\fR\fR  - Explicitly create the 3D NULL-value bitmap file.
.SH KEYWORDS
raster3d, voxel
.SH SYNOPSIS
\fBr3.null\fR
.br
\fBr3.null help\fR
.br
\fBr3.null map\fR=\fIstring\fR  [\fBsetnull\fR=\fIval[\-val]\fR[,\fIval[\-val]\fR,...]]   [\fBnull\fR=\fIfloat\fR]   [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR] 
.SS Parameters:
.IP "\fBmap\fR=\fIstring\fR" 4m
.br
3d raster map for which to modify null values
.IP "\fBsetnull\fR=\fIval[\-val][,\fIval[\-val]\fR,...]\fR" 4m
.br
List of cell values to be set to NULL
.IP "\fBnull\fR=\fIfloat\fR" 4m
.br
The value to replace the null value by
.PP
.SH DESCRIPTION
Modifies the NULL values of a 3D raster map.
.SH SEE ALSO
\fI
r.null
\fR
.SH AUTHORS
Roman Waupotitsch, Michael Shapiro, 
Helena Mitasova, Bill Brown, Lubos Mitas,
Jaro Hofierka
.PP
\fILast changed: $Date: 2011-09-13 22:13:36 +0200 (Tue, 13 Sep 2011) $\fR
.PP
Full index
.PP
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