In an E-mail message, DUNN JEREMY SIMON wrote:
GoodAfternoon,
I'm interested in getting a 50km grid overlay on a map of the Mississippi River
Basin I have. Is there a way of creating this in Grass ?Thanks
Jerry,
I believe you can use the Grass program v.mkgrid to accompish what you want.
Here's part of the man page:
NAME
v.mkgrid - Creates a (binary) GRASS vector map of a user-
defined grid.
(GRASS Vector Program)
SYNOPSIS
v.mkgrid
v.mkgrid help
v.mkgrid map=name grid=rows,columns coordinate=x,y
box=length,width
DESCRIPTION
v.mkgrid will create a binary format, vector map
representation of a regular coordinate grid.
Parameters:
map=name Name to be assigned to binary vector
map layer output.
grid=rows,columns Number of ROWS and COLUMNS to appear
in grid.
coordinate=x,y Lower left EASTING and NORTHING
coordinates of vector map layer
output.
box=length,width LENGTH and WIDTH of boxes in grid.
If the user simply types v.mkgrid on the command line
without specifying parameter values, the program will prompt
the user for inputs using the standard interface described
in the manual entry for parser.
NOTES
The new binary vector map output is placed under the dig
directory in the user's current mapset, and can be used like
any vector map layer. Run v.support to build the topology
information for the vector map before using v.mkgrid map
layer outputs in the v.digit program.
--
-------------------------
Paul Loechl p-loechl@cecer.army.mil
USA CERL (217)352-6511x7668