NAME

       r.quant  - Produces the quantization file for a floating-point map.

KEYWORDS

       raster, quantization

SYNOPSIS

       r.quant
       r.quant help
       r.quant [-tr]  [basemap=string]  input=string[,string,...] fprange=dmin,dmax range=min,max
       [--verbose]  [--quiet]

   Flags:
       -t
           Truncate floating point data

       -r
           Round floating point data

       --verbose
           Verbose module output

       --quiet
           Quiet module output

   Parameters:
       basemap=string
           Base map to take quant rules from
           Default: NONE

       input=string[,string,...]
           Raster map(s) to be quantized

       fprange=dmin,dmax
           Floating point range: dmin,dmax
           Default:

       range=min,max
           Integer range: min,max
           Default: 1,255

DESCRIPTION

       r.quant produces the quantization file for a floating-point map.

       The map parameter defines the map for which the rules are to be created. If more than  one
       map  is  specified,  then  this  implies that the floating-point range is the miniumum and
       maximum of all  the  maps  together,  unless  either  basemap=map  or  fprange=min,max  is
       specified.

   Quant rules
       The quant rules have to be entered interactively.

       If rules is specified, the input has the form:

       value1:value2:cat1:[cat2]

       where value1 and value2 are floating point values and cat1 cand cat2 are integers. If cat2
       is missing, it is taken to be equal to cat1. All values can be "*" which means infinity.

NOTE

       It is an error for both basemap and fprange to be specified.

SEE ALSO

       r.support, r.null

AUTHOR

       Michael Shapiro, Olga Waupotitsch, U.S.Army Construction Engineering Research Laboratory

       Last changed: $Date: 2010-02-27 17:56:22 -0800 (Sat, 27 Feb 2010) $

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