r.cell.area - GRASS GIS manual

NAME

r.cell.area - Calculate cell sizes within the computational region

KEYWORDS

SYNOPSIS

r.cell.area

r.cell.area --help

r.cell.area output=name units=string [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--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:

output=name [required]: Output grid of cell sizes
units=string [required]: Units for output areas; Options: m2, km2

DESCRIPTION
NOTES
SEE ALSO
AUTHOR

DESCRIPTION

r.cell.area uses the current computational region to compute the area of each raster cell. It can do so on a projected coordinate system or on a geographic coordinate system; the latter is accomplished via the latitude of the cell's midpoint. This approximation can generate ~1% error with coarse lat/lon cells near the poles.

NOTES

Output units can be either square meters or square kilometers. This module is useful for determining the flow accumulation area to weight flow accumulation algorithms by rainfall and/or on lat/lon grids.

AUTHOR

Andrew D. Wickert

SOURCE CODE

Available at: r.cell.area source code (history)