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



NNAAMMEE
       vv..ddiiggiitt	 -  A  menu-driven, highly interactive map development 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 interactive 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, edit-
       ing, labeling, windowing, and converting vector data  to  GRASS	raster
       format.


       _v_._d_i_g_i_t	consists of two parts: an initialization procedure, and a mul-
       tiple 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 environment in
	      which digitizing,  editing,  labeling,  and  other  options  are
	      available.  It is within this second 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  performance.   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 win-
       dowing 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 vec-
       tor  map layers onto the feature being digitized (Customize menu, Over-
       lay), and set a multitude of parameters to furtherly customize a  digi-
       tizing 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. digitizer 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 minimum 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)
