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       v.label  - Creates paint labels for a vector map from attached attributes.


       vector, paint labels


       v.label --help
       v.label    [-ac]     [labels=name]    map=name   column=name    [type=string[,string,...]]
       [layer=string]         [where=sql_query]          [xoffset=float]          [yoffset=float]
       [reference=string[,string,...]]       [font=string]       [size=float]       [space=float]
       [fontsize=integer]          [color=name]          [rotation=angle]           [width=float]
       [highlight_color=name]      [highlight_width=float]      [bgcolor=name]      [border=name]
       [opaque=yes|no]   [--help]  [--verbose]  [--quiet]  [--ui]

           Rotate labels to align with lines

           Curl labels along lines

           Print usage summary

           Verbose module output

           Quiet module output

           Force launching GUI dialog

           Name for new paint-label file
           If not given the name of the input map is used

       map=name [required]
           Name of vector map
           Or data source for direct OGR access

       column=name [required]
           Name of attribute column to be used for labels

           Input feature type
           Options: point, line, boundary, centroid
           Default: point,line,boundary,centroid

           Layer number or name
           Vector features can have category values in different layers. This  number  determines
           which layer to use. When used with direct OGR access this is the layer name.
           Default: 1

           WHERE conditions of SQL statement without ’where’ keyword
           Example: income < 1000 and population >= 10000

           Offset label in x-direction
           Default: 0

           Offset label in y-direction
           Default: 0

           Reference position
           Options: center, left, right, upper, lower
           Default: center

           Font name
           Default: standard

           Label size (in map-units)
           Default: 100

           Space between letters for curled labels (in map-units)

           Label size (in points)
           Options: 1-1000

           Text color
           Either a standard color name or R:G:B triplet
           Default: black

           Rotation angle in degrees (counter-clockwise)
           Options: 0-360
           Default: 0

           Border width
           Options: 0-25
           Default: 1

           Highlight color for text
           Either a standard color name, R:G:B triplet, or "none"
           Default: none

           Width of highlight coloring
           Default: 0

           Background color
           Either a standard color name, R:G:B triplet, or "none"
           Default: none

           Border color
           Either a standard color name, R:G:B triplet, or "none"
           Default: none

           Opaque to vector (only relevant if background color is selected)
           Options: yes, no
           Default: yes


       v.label  makes a label-file from a GRASS vector map with labels created from attributes in
       the attached table.  If no label file name is given, the name of the source map is used.


       If the fontsize option is given then the space option is determined automatically from the
       current  display  window, otherwise the space option should be set roughly the same as the
       size option.

       A description of the labels file follows.

       The file is located in  $MAPSET/paint/labels/.   The  file  is  a  plain-text  ASCII  file
       containing the following fields:

   Caution: The following information may be incomplete, out of date, and wrong!
       The label information that must be provided in the labels file is:

           Lines  in  multiple line labels will appear one above the next.  More than one line of
           text can be specified by notating the end of a line with a ’\n’.
           (e.g. SPEARFISH\nSOUTH DAKOTA).

           Determines where the text will be located  on  the  image.   The  user  specifies  the
           easting and northing, and (optionally) specifies a vertical and horizontal offset from
           the specified easting/northing.  These offsets are provided to allow  finer  placement
           of labels and are measured in local pixels. Thus in d.labels the offset is measured in
           screen pixels, and in the offset is measured in PostScript points  (i.e.  1/72"

           Determines  which  part  of  the  label to which the location refers.  If placement is
           unspecified, the label is centered (center),  by  default.   Label  placement  may  be
           specified as:
                lower left     (lower left corner of the text)
                lower right    (lower right corner of the text)
                lower center   (bottom center of the text)
                upper left     (upper left corner of the text)
                upper right    (upper right corner of the text)
                upper center   (top center of the text)
                center    (center of the text)

           This specifies the font to use.

       The following fonts are available for use with d.labels:

         cyrilc gothgbt gothgrt gothitt greekc greekcs greekp greeks
         italicc italiccs italict romanc romancs romand romans romant
         scriptc scripts

       Alternatively the path to a FreeType (.ttf) font may be given.  (for d.labels only)

       The word standard can be used to specify the default font (which is romans).

       Note can override this setting to use other fonts. Its default font is Helvetica.

       TEXT SIZE:
           This determines the size of the letters. The size specifies the vertical height of the
           letters in meters on the ground. Thus text will grow or shrink depending on the  scale
           at  which  the  map  is drawn.  Alternatively fontsize can set the font size in normal
           font points.

       TEXT COLOR:
           This selects the text color.  If unspecified, the label’s text is drawn in  black,  by
           default.  The text color can be specified in one of several ways:

       1   By color name:
           aqua  black  blue  brown  cyan gray green grey indigo magenta orange purple red violet
           white yellow

       2   As red, green, blue component values. (0-255)
           for example: 128:100:200

       3   Specify "none" to suppress the lettering.

           This determines the line thickness of the border box.
           The maximum value is 25.0.

           The text can be highlighted in another color so that it appears to be in  two  colors.
           The  text  is drawn first in this color at a wider line width, and then redrawn in the
           text color at the regular line width.  No highlight color ("none") is used by default,
           if  unspecified  by  the  user.  To specify use of no highlight color, specify "none".
           (See TEXT COLOR above for a list of permissible color names.)

           Specifies how far from the text lines (in units of pixels) the highlight color  should
           extend.  The default highlight width is set to 0 (i.e., no highlight color).

           Text  may  be boxed in a solid color by specifying a background color.  Specify "none"
           for no background.  The default background color setting, if unspecified by the  user,
           is white.  (See TEXT COLOR above for a list of permissible color names.)

           Select  a  color for the border around the background.  Specify "none" to suppress the
           border.  The default border color used, if unspecified, is  black.   (See  TEXT  COLOR
           above for a list of permissible color names.)

           yes|no.   This  field  only  has  meaning if a background color is selected.  yes will
           prevent vector lines from entering the background.  no  will  allow  vector  lines  to
           enter the background.  The default setting, if unspecified by the user, is yes.


       Spearfish example with TrueType font (path may differ):
       v.label -a map=roads column=label labels=lroads \
       d.vect roads
       d.labels lroads
       Since  the label files are simple text files, you can merge them together if you like. For
       example if you set the label colors based on database attributes using multiple runs  with
       the where option.  This example uses the standard UNIX cat program.
       cd $MAPSET/paint/labels/
       cat file1 file2 file3 file4 > file_all




       Philip Verhagen (original s.label)
       Radim Blazek (GRASS 6 port)
       Hamish Bowman (enhancements)

       Last changed: $Date: 2014-12-12 00:12:46 +0100 (Fri, 12 Dec 2014) $


       Available at: v.label source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.1 Reference Manual