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



NNAAMMEE
       vv..ddiiggiitt	 - A menu-driven, highly interactive map develop-
       ment program used for vector digitizing, editing, labeling
       and converting vector data to raster format.
       _(_G_R_A_S_S _V_e_c_t_o_r _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       vv..ddiiggiitt

DDEESSCCRRIIPPTTIIOONN
       The  GRASS program _v_._d_i_g_i_t is a menu-driven, highly inter-
       active map development program used for	inputting  analog
       map  data  into	a  GRASS vector format.  _v_._d_i_g_i_t contains
       programs for vector digitizing, editing, labeling, window-
       ing, and converting vector data to GRASS raster format.


       _v_._d_i_g_i_t	consists  of  two parts: an initialization proce-
       dure, and a multiple menu-driven environment.

	      The initialization procedure  involves  choosing	a
	      digitizer,  choosing the name of a vector map layer
	      to digitize, and, if needed, registering a  map  to
	      the  digitizing surface. It is important to specify
	      the map scale.

	      The second part of _v_._d_i_g_i_t is a multiple-menu envi-
	      ronment in which digitizing, editing, labeling, and
	      other options are available. It is within this sec-
	      ond  portion  of	_v_._d_i_g_i_t  that all vector creation
	      occurs.


NNOOTTEESS
       _v_._d_i_g_i_t was written to optimize digitizing speed and  per-
       formance.   It has a convenient graphic display format and
       very  convenient  windowing  capabilities.  Features   are
       color-coded  for  ease of identification and verification.
       Different color schemes may be user-chosen to customize	a
       digitizing session.


       Area,  line,  and  point features may be digitized in both
       "stream" and "point" modes. Both a mouse and  a	digitizer
       may  be used to perform windowing functions.  Labeling and
       editing are done from within _v_._d_i_g_i_t, rather than  through
       a separate set of programs.


       _v_._d_i_g_i_t	has  capabilities  that  allow	users  to display
       raster maps in background (Customize menu,  Backdrop),  to
       overlay	already  existing vector map layers onto the fea-
       ture being digitized (Customize menu, Overlay), and set	a
       multitude  of parameters to furtherly customize a digitiz-
       ing session.


       _v_._d_i_g_i_t may be used with or  without  a	digitizer.   Many
       options	are available if no digitizer is used, i.e. digi-
       tizer support by mouse.


       All options available within _v_._d_i_g_i_t are contained  within
       ten  menus.  Movement from menu to menu is done by chosing
       the movement options specified at the bottom of each menu.


       DDiiggiittiizzeerr ssuuppppoorrtt


       GRASS  is using device independent code written originally
       by John Dabritz formerly of the Forest Service, which uses
       ascii  description files to define how to communicate with
       the digitizer. The result is that we  should  be  able  to
       support just about any digitizer out there now with a min-
       imum of work.  Refer to the "digitizer definition  manual"
       for information on the format of these files.

SSEEEE AALLSSOO
       GRASS 4.0 map digitizing manual: v.digit


       _v_._i_m_p_o_r_t_,  _v_._i_n_._a_s_c_i_i_,  _v_._o_u_t_._a_s_c_i_i_,  _v_._s_p_a_g_,  _v_._o_u_t_._r_a_s_t_,
       _v_._t_r_i_m_, _v_._s_u_p_p_o_r_t


AAUUTTHHOORRSS
       David Gerdes,
       Mike Higgins,
       U.S. Army Construction Engineering Research Laboratory
       Improvements by Huidae Cho

       _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.digit(1)
