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r.quant(1grass) GRASS User's Manual r.quant(1grass)

NAME

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

KEYWORDS

raster, statistics, quantization

SYNOPSIS

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

Flags:


Truncate floating point data

Round floating point data

Print usage summary

Verbose module output

Quiet module output

Force launching GUI dialog

Parameters:


Raster map(s) to be quantized

Path to rules file ("-" to read from stdin)

Base map to take quant rules from

Floating point range: dmin,dmax

Integer range: min,max

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 minimum 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 and 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 to specify both basemap and fprange.

SEE ALSO

r.support, r.null

AUTHORS

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

SOURCE CODE

Available at: r.quant source code (history)

Latest change: Thursday May 08 20:58:05 2025 in commit: 4144ba81fa125e1549fc52e1cf5feb4fa004be8b

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© 2003-2026 GRASS Development Team, GRASS 8.5.0RC1 Reference Manual

GRASS 8.5.0RC1