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:

-t: Truncate floating point data
-r: Round floating point data
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=string[,string,...] [required]: Raster map(s) to be quantized
rules=name: Path to rules file ("-" to read from stdin)
basemap=string: Base map to take quant rules from
fprange=dmin,dmax: Floating point range: dmin,dmax
range=min,max: 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 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.

AUTHOR

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

SOURCE CODE

Available at: r.quant source code (history)