r.buffer.lowmem - Creates a raster map showing buffer zones surrounding cells that contain non-NULL

       Michael Shapiro, U.S. Army Construction Engineering Research Laboratory
       James Westervelt, U.S. Army Construction Engineering Research Laboratory
       Low-memory Python version by Glynn Clements

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.

       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

       raster, buffer

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.

g.region,r.buffer,r.cost,r.grow.distance,r.mapcalc,r.reclass,v.buffer

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

       Accessed: Friday Apr 04 01:21:11 2025

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       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                              r.buffer.lowmem(1grass)

r.buffer.lowmemr.buffer.lowmem--helpr.buffer.lowmem [-z] input=nameoutput=namedistances=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