NAME

       v.digit  - Interactive editing and digitization of vector maps.

KEYWORDS

       vector, editing, digitization

SYNOPSIS

       v.digit
       v.digit help
       v.digit [-n] map=name  [bgcmd=string]   [--verbose]  [--quiet]

   Flags:
       -n
           Create new file if it does not exist.

       --verbose
           Verbose module output

       --quiet
           Quiet module output

   Parameters:
       map=name
           Name of input vector map

       bgcmd=string
           Display commands to be used for canvas backdrop (separated by ';')
           Default:

DESCRIPTION

       v.digit  is  a vector map digitizer with TCL/TK-based graphical user interface.  Attribute
       tables can be directly generated while digitizing (define in "Settings" first).

NOTES

       The bgcmd option is intended to be used with display (d.*) commands.  If  several  display
       commands  are  to be used to render the background they should be separated with the semi-
       colon ';' character.  When  run  from  the  command  line,  these  display  commands  will
       generally need to be "quoted" as they will contain spaces (see examples).

       Dead (deleted) lines: If a user deletes a line in v.digit, it is internally only marked in
       the geometry file as 'dead' but it remains there and occupies  space.  Any  vector  module
       used  afterwards on this map which really reads and writes vector geometry (so not g.copy)
       will writes only lines which are 'alive'.

       If v.digit crashes for some reason you can repair the vector map which was left open  with
       the v.build module.

EXAMPLES

   Start a monitor and display a raster to help setup and zoom to area of interest

       d.mon x0
       d.rast name_of_raster

   Digitizing an area based on a existing raster map; creating a new vector map

       v.digit -n map=name_of_new_vector_map bgcmd="d.rast map=name_of_raster"

       The  -n  flag  specifies  that your vector map does not yet exist and thus will be created
       with the name given by map. The bgcmd specifies a display (d.*)  command  and  is  set  in
       "quotes" as it contains a space.

       The v.digit GUI appears and vector map "name_of_new_vector_map" is created.

       After leaving v.digit, run:
       d.erase
       d.vect "name_of_new_vector_map"
        The display should be cleared and the newly created vector should appear in the monitor.

   Digitizing a second vector, using your first vector and the raster image
       as background
       v.digit -n map=name_of_second_vector \
       bgcmd="d.rast map=name_of_your_raster; d.vect map=name_of_new_vector_map"
         The  v.digit  GUI  appears  and  the  layers  defined  with  bgcmd  are displayed in the
       background. As the bgcmd commands are executed as a series of  commands  (separated  by  a
       ";"), the last command (d.vect) displays over the top of the earlier raster image.

   Combining bgcmd with d.save to use the existing
       display as a backdrop
       v.digit map=name bgcmd="`d.save -o | cut -f1 -d'#' | tr '\n' ';'`"
         d.save  will  list  the  commands  used to draw the current display; cut and tr are UNIX
       commands  which  are  used  to  remove  comments  and  trade  newlines  for   semi-colons,
       respectively.

SEE ALSO

        r.digit, v.clean, v.edit

       See also wxGUI Vector Digitizer.

AUTHOR

       Radim Blazek, ITC-Irst, Trento, Italy

       Last changed: $Date: 2011-01-31 15:58:25 -0800 (Mon, 31 Jan 2011) $

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