r.quant (1grass)

raster, quantization

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

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.

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

r.support, r.null

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) $

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