This is the command r.buffer.lowmemgrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
r.buffer.lowmem - Creates a raster map showing buffer zones surrounding cells that
contain non-NULL category values.
This is the low-memory alternative to the classic r.buffer module.
KEYWORDS
raster, buffer
SYNOPSIS
r.buffer.lowmem
r.buffer.lowmem --help
r.buffer.lowmem [-z] input=name output=name distances=float[,float,...] [units=string]
[--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
-z
Ignore zero (0) data cells instead of NULL cells
--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 input raster map
output=name [required]
Name for output raster map
distances=float[,float,...] [required]
Distance zone(s)
units=string
Units of distance
Options: meters, kilometers, feet, miles, nautmiles
Default: meters
DESCRIPTION
r.buffer.lowmem creates a new raster map showing buffer (a.k.a. "distance" or "proximity")
zones around all cells that contain non-NULL category values in an existing raster map.
The distances of buffer zones from cells with non-zero category values are user-chosen.
This is the low-memory alternative to the classic r.buffer module. It is much slower than
the classic version, but will run on massive raster maps without using a lot of RAM. If
your raster map is larger than 32000x32000 cells on a system with 1 GB of RAM, or larger
than 90000x90000 cells on a system with 8 GB of RAM, consider using this module.
For more info see manual of r.buffer.
EXAMPLE
In the following example, the buffer zones would be (in the default units of meters):
0-100, 101-200, 201-300, 301-400 and 401-500.
r.buffer.lowmem input=roads output=roads.buf distances=100,200,300,400,500
Result:
r.category input=roads.buf
1 distances calculated from these locations
2 0-100 meters
3 100-200 meters
4 200-300 meters
5 300-400 meters
6 400-500 meters
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