GRASS GIS manual: r.area

NAME

r.area - Calculates area of clumped areas and remove areas smaller than given threshold.

KEYWORDS

SYNOPSIS

r.area

r.area --help

r.area [-b] input=name output=name [lesser=integer] [greater=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-b: Binary output
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=name [required]: Name of cell category map, e.g., maps created with r.clump
output=name [required]: Map with area size (in cells)
lesser=integer: Remove areas lower than (0 for none):; Default: 0
greater=integer: Remove areas greater than (-1 for none):; Default: -1

OPTIONS
DESCRIPTION
SEE ALSO
AUTHOR

OPTIONS

input: Name of input created with r.clump or another cell category map.
treshold: Remove areas smaller than treshold, set null for removing areas
binary: Output map has only 0 and 1 values. If treshold is applied small areas are emoved and replaced by 0
output: Original categories replaced with number of cells for each category. If areas belonging to category are not continuous every area belonging to the same category has the same area value.

DESCRIPTION

module can be used to remove, areas smaller than treshold, reclass according areas (similar to r.reclass area, but work in cells, not hectares and allow create more classes)

AUTHOR

Jarek Jasiewicz

SOURCE CODE

Available at: r.area source code (history)