v.mkgrid(1)		      Grass User's Manual		   v.mkgrid(1)



NNAAMMEE
       vv..mmkkggrriidd  - Creates a (binary) GRASS vector map of a user-defined grid.
       _(_G_R_A_S_S _V_e_c_t_o_r _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       vv..mmkkggrriidd
       vv..mmkkggrriidd hheellpp
       vv..mmkkggrriidd  mmaapp==_n_a_m_e  ggrriidd==_r_o_w_s_,_c_o_l_u_m_n_s  ccoooorrddiinnaattee==_x_,_y  bbooxx==_l_e_n_g_t_h_,_w_i_d_t_h
       [aannggllee==_d_e_g_r_e_e] [ttyyppee==_c_o_n_s_t_|_r_o_w_s_|_c_o_l_s] [vvaalluuee==_c_o_n_s_t_a_n_t _v_a_l_u_e]

DDEESSCCRRIIPPTTIIOONN
       _v_._m_k_g_r_i_d  will  create  a binary format, vector map representation of a
       regular coordinate grid.



   FFllaaggss::
       --qq     Quiet. Cut out the chatter.




   PPaarraammeetteerrss::
       mmaapp==_n_a_m_e
	      Name to be assigned to binary vector map layer output.

       ggrriidd==_r_o_w_s_,_c_o_l_u_m_n_s
	      Number of ROWS and COLUMNS to appear in grid.

       ccoooorrddiinnaattee==_x_,_y
	      Lower left EASTING and NORTHING coordinates of vector map  layer
	      output.

       bbooxx==_l_e_n_g_t_h_,_w_i_d_t_h
	      LENGTH and WIDTH of boxes in grid.

       [aannggllee==_d_e_g_r_e_e]
	      optional rotate grid counter-clockwise about the origin (ccoooorrddii--
	      nnaattee).

       [ttyyppee==_c_o_n_s_t_|_r_o_w_s_|_c_o_l_s ]
	      Option to add attributes to the grid. Area  points  are  in  the
	      centre  of the respective cells. _c_o_n_s_t creates attributes of the
	      same value in each cell (the value is 11 by default, but  may  be
	      chosen with the vvaalluuee option. The other options number the cells
	      in sequence. _r_o_w_s numbers the rows in  turn,  _c_o_l_s  numbers  the
	      columns  in  turn. If the grid is rotated, numbering is relative
	      to the pre-rotated position.

       [vvaalluuee==_c_o_n_s_t_a_n_t _v_a_l_u_e]
	      This option determines the constant value of the cell attributes
	      if  the  ttyyppee=_c_o_n_s_t option is chosen, otherwise it is ignored if
	      supplied.



       If the user simply types vv..mmkkggrriidd on the command line without  specify-
       ing parameter values, the program will prompt the user for inputs using
       the standard interface described in the manual entry for _p_a_r_s_e_r.

NNOOTTEESS
       The new binary vector map output is placed under the _d_i_g  directory  in
       the  user's  current mapset, and can be used like any vector map layer.
       Run _v_._s_u_p_p_o_r_t to build the topology  information  for  the  vector  map
       before using _v_._m_k_g_r_i_d map layer outputs in the _v_._d_i_g_i_t program.


       It may be advisable to use a small snap distance with _v_._s_u_p_p_o_r_t to make
       sure the grid lines snap correctly along the edges.


       Since the grid is computer-generated, the corner  coordinates  will  be
       exact and can be used when patching together several _v_._m_k_g_r_i_d grids.


       This  is  NOT  to be used to generate a vector map of USGS quadrangles,
       because USGS quads are not exact rectangles.  To generate a vector  map
       of USGS quads, use the program _v_._m_k_q_u_a_d_s.


       The  program  ignores the current GRASS geographic region settings.  It
       will create the complete grid even if part of this grid	falls  outside
       the current geographic region.


       Rotating  the  grid should not usually be necessary under normal usage,
       but this option is available. This can  also  be  used  with  attribute
       options.

SSEEEE AALLSSOO
       v.digit, v.mkquads, v.patch, v.support and parser

AAUUTTHHOORR
       Michael Higgins, U.S.Army Construction Engineering Research Laboratory

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_5 _$



GRASS 5.0							   v.mkgrid(1)
