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: 2010-02-28 02:56:22 +0100 (Sun, 28 Feb 2010) $ Full index © 2003-2011 GRASS Development Team