.TH v.mkgrid 1grass "" "GRASS 6.4.4" "Grass User's Manual"
.SH NAME
\fI\fBv.mkgrid\fR\fR  - Creates a GRASS vector map of a user-defined grid.
.SH KEYWORDS
vector, geometry
.SH SYNOPSIS
\fBv.mkgrid\fR
.br
\fBv.mkgrid help\fR
.br
\fBv.mkgrid\fR [\-\fBpq\fR] \fBmap\fR=\fIname\fR \fBgrid\fR=\fIrows,columns\fR  [\fBposition\fR=\fIstring\fR]   [\fBcoor\fR=\fIx,y\fR]   [\fBbox\fR=\fIwidth,height\fR]   [\fBangle\fR=\fIfloat\fR]   [\fBbreaks\fR=\fIinteger\fR]   [\-\-\fBoverwrite\fR]  [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR] 
.SS Flags:
.IP "\fB\-p\fR" 4m
.br
Create grid of points instead of areas and centroids
.IP "\fB\-q\fR" 4m
.br
Quiet; No chatter
.IP "\fB\-\-overwrite\fR" 4m
.br
Allow output files to overwrite existing files
.IP "\fB\-\-verbose\fR" 4m
.br
Verbose module output
.IP "\fB\-\-quiet\fR" 4m
.br
Quiet module output
.PP
.SS Parameters:
.IP "\fBmap\fR=\fIname\fR" 4m
.br
Name for output vector map
.IP "\fBgrid\fR=\fIrows,columns\fR" 4m
.br
Number of rows and columns in grid
.IP "\fBposition\fR=\fIstring\fR" 4m
.br
Where to place the grid
.br
Options: \fIregion,coor\fR
.br
Default: \fIregion\fR
.br
\fBregion\fR: current region
.br
\fBcoor\fR: use 'coor' and 'box' options
.IP "\fBcoor\fR=\fIx,y\fR" 4m
.br
Lower left easting and northing coordinates of map
.IP "\fBbox\fR=\fIwidth,height\fR" 4m
.br
Width and height of boxes in grid
.IP "\fBangle\fR=\fIfloat\fR" 4m
.br
Angle of rotation (in degrees counter-clockwise)
.br
Default: \fI0\fR
.IP "\fBbreaks\fR=\fIinteger\fR" 4m
.br
Number of horizontal vertex points per grid cell
.br
Options: \fI3-30\fR
.br
Default: \fI3\fR
.PP
.SH DESCRIPTION
\fIv.mkgrid\fR will create a vector map representation of a regular coordinate grid.
Both point and area vector grids can be created.
.SH NOTES
Grid points created with the \fB-p\fR flag will be placed at the
\fIcenter\fR of each grid cell, not at the grid line nodes.
.PP
This is NOT to be used to generate a vector map of USGS quadrangles,
because USGS quads are not exact rectangles.
.SH EXAMPLES
Make a 4x3 grid, cells 20km a side, with lower left corner at 2716500,6447000:
\fC
.DS
.br
v.mkgrid map=coro_grid grid=4,3 position=coor coor=2716500,6447000 box=20000,20000
.br
.DE
\fR
.PP
3) Make a 10x12 lat/lon grid, cells 2 arc-min a side, with lower left corner
at 167deg 52min east, 47deg 6min south. For use with e.g. QGIS you can then
pull this grid into a projected location with \fIv.proj\fR before
exporting as a Shapefile with \fIv.out.ogr\fR (within GRASS you could
just use \fId.grid \-w\fR from the projected location for the same effect):
\fC
.DS
.br
v.mkgrid map=p2min_grid grid=10,12 position=coor coor=167:52E,47:06S box=0:02,0:02
.br
.DE
\fR
.SH SEE ALSO
\fI
v.patch,
d.grid
\fR
.SH AUTHORS
Michael Higgins,
U.S.Army Construction Engineering 
Research Laboratory
.PP
Update for new vectors Radim Blazek 10/2004 
.PP
\fILast changed: $Date: 2014-05-16 19:12:35 +0200 (Fri, 16 May 2014) $\fR
.PP
Full index
.PP
© 2003-2014 GRASS Development Team