r.buffer.lowmem(1grass)

Usage

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]

Keywords

raster, buffer

Overview

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.

Examples

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

Source code

Available at: r.buffer.lowmem source code (history)

Accessed: Monday Feb 24 17:51:44 2025

Releases

5 releases since Debian 9 (Stretch); the text changed 4 times.

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