smoother legends

[Bill Brown]

I posted this last week, but I think the list was down at the time
so here it is again:

Several people requested the code for "d.leg.thin", an enhanced
version of d.legend that allows the user to specify a thinning
factor so you don't have to have a legend coloor for every single
category.  So it is now available by anonymous ftp from 
moon.cecer.army.mil (129.229.20.254) under grass/incoming.  I also
went ahead and added a "smooth" option that draws a single box
with a gradient of colors.  Here's the README from the tar file:


This is an improved version of d.legend that allows:

    Thinning the categories to be represented in the legend
    Displaying a continuous gradient of all categories in the legend
    Interactive mouse placement of the smooth gradient box

I have not tested this version very well, so can not claim that it
will work for all maps & situations.  I also have not had the chance to
write an updated man page, but "d.leg.thin help" produces:

***************************************************************************
Usage:
 d.leg.thin [-nsm] map=name [color=name] [lines=value] [thin=value]

Flags:
  -n   Do not show category values
  -s   Draw smooth gradient
  -m   Use mouse to size & place legend (only when -s is specified)

Parameters:
    map   Name of raster map
  color   Sets the legend's text color
          options: red,orange,yellow,green,blue,indigo,white,black,brown,
                   magenta,aqua,gray,grey
          default: white
  lines   Number of text lines (useful for truncating long legends)
          options: 0-1000
          default: 0
   thin   Thinning factor (thin=10 gives cats 0,10,20...)
          options: 0-1000
          default: 1
***************************************************************************


Also note that when using the mouse to size & place the smooth legend,
if you make a horizontal box the values run from left to right and no
category values are printed (you may want to use d.label for that).

This program is not a part of any official release of GRASS. 

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Bill Brown				e-mail: brown at zorro.cecer.army.mil
USACERL - ECS				phone:  (217) 352-6511 ext 676
PO Box 9005
Champaign, IL  61826-9005
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