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 represen-
       tation 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 out-
	      put.

       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 vec-
	      tor 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 (ccoooorrddiinnaattee).

       [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	specifying  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 coordi-
       nates 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)
