 
Note: A new GRASS GIS stable version has been released: GRASS GIS 7.6, available here.
 Updated manual page: here
NAME
d.barscale  - Displays a barscale on the graphics monitor.
KEYWORDS
display, 
cartography
SYNOPSIS
d.barscale
d.barscale --help
d.barscale [-ftn]  [style=string]   [at=x,y]   [length=integer]   [units=string]   [label=string]   [segment=integer]   [color=name]   [bgcolor=name]   [text_position=string]   [width_scale=float]   [fontsize=float]   [--help]  [--verbose]  [--quiet]  [--ui] 
Flags:
- -f
- Use feet/miles instead of meters
- -t
- Draw the scale bar without text
- -n
- Display north-arrow symbol.
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
 
Parameters:
- style=string
- Type of barscale to draw
- Options: classic, line, solid, hollow, full_checker, part_checker, mixed_checker, tail_checker, up_ticks, down_ticks, both_ticks, arrow_ends
- Default: classic
 classic: Classic style classic: Classic style
 line: Line style line: Line style
 solid: Solid style solid: Solid style
 hollow: Hollow style hollow: Hollow style
 full_checker: Full checker style full_checker: Full checker style
 part_checker: Part checker style part_checker: Part checker style
 mixed_checker: Mixed checker style mixed_checker: Mixed checker style
 tail_checker: Tail checker style tail_checker: Tail checker style
 up_ticks: Up ticks style up_ticks: Up ticks style
 down_ticks: Down ticks style down_ticks: Down ticks style
 both_ticks: Both ticks style both_ticks: Both ticks style
 arrow_ends: Arrow ends style arrow_ends: Arrow ends style
- at=x,y
- Screen coordinates of the rectangle's top-left corner
- (0,0) is lower-left of the display frame
- Options: 0-100
- Default: 0.0,10.0
- length=integer
- Length of barscale in map units
- Options: 0-
- Default: 0
- units=string
- Barscale units to display
- Options: meters,  kilometers,  feet,  miles
- label=string
- Custom label of unit
- segment=integer
- Number of segments
- Options: 1-100
- Default: 10
- color=name
- Bar scale and text color
- Either a standard color name or R:G:B triplet
- Default: black
- bgcolor=name
- Background color (drawn behind the bar)
- Either a standard color name, R:G:B triplet, or "none"
- Default: white
- text_position=string
- Text position
- Options: under, over, left, right
- Default: right
- width_scale=float
- Scale factor to change bar width
- Options: 0.5-100
- Default: 1
- fontsize=float
- Font size
- Options: 1-360
- Default: 12
 
 
d.barscale displays a barscale on the graphics monitor at the
given screen coordinates. If no coordinates are given it will draw the
barscale in the bottom left of the display.
The barscale can drawn in a number of styles (see style
parameter for their previews).
d.barscale will not work in Lat/Lon locations as the horizontal
scale distance changes with latitude.
Try 
d.grid instead.
d.graph,
d.grid,
d.legend,
d.northarrow,
g.region
unknown, but from USACE/CERL.
Major rewrite for GRASS 7 by Hamish Bowman
Last changed: $Date: 2013-09-18 06:49:10 -0700 (Wed, 18 Sep 2013) $
SOURCE CODE
Available at: d.barscale source code (history)
Note: A new GRASS GIS stable version has been released: GRASS GIS 7.6, available here.
 Updated manual page: here
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GRASS Development Team,
GRASS GIS 7.2.4svn Reference Manual