NAME

       r.reclass.area  - Reclasses a raster map greater or less than user specified area size (in
       hectares).

KEYWORDS

       raster, statistics, aggregation

SYNOPSIS

       r.reclass.area
       r.reclass.area --help
       r.reclass.area  [-cd]  input=name  output=name  value=float  mode=string   [method=string]
       [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -c
           Input map is clumped

       -d
           Clumps including diagonal neighbors

       --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

       value=float [required]
           Value option that sets the area size limit (in hectares)

       mode=string [required]
           Lesser or greater than specified value
           Options: lesser, greater

       method=string
           Method used for reclassification
           Options: reclass, rmarea
           Default: reclass

DESCRIPTION

       r.reclass.area  reclasses a raster map greater or less than a user specified area size (in
       hectares).

       If the -c flag is used, r.reclass.area will skip the creation  of  a  clumped  raster  and
       assume that the input raster is already clumped.

EXAMPLES

       In  this  example,  the  ZIP  code  map  in  the North Carolina sample dataset location is
       filtered for large areas (removing smaller areas from the map).
       g.region raster=zipcodes -p
       r.report zipcodes unit=h
       Extract only areas greater than 2000 ha, NULL otherwise:
       r.reclass.area input=zipcodes output=zipcodes_larger2000ha mode=greater value=2000
       r.report zipcodes_larger2000ha unit=h
       Figure: r.reclass.area method=reclass In this example, the  ZIP  code  map  in  the  North
       Carolina  sample dataset location is filtered for smaller areas which are substituted with
       the value of the respective  adjacent  area  with  largest  shared  boundary.  Reclass  by
       substitutional removing of areas minor of 1000 ha:
       r.reclass.area input=zipcodes output=zipcodes_minor1000ha mode=lesser value=1000 method=rmarea
       Figure: r.reclass.area method=rmarea

SEE ALSO

        r.reclass, r.clump, r.stats

AUTHORS

       NRCS,
       Markus Neteler

SOURCE CODE

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

       Accessed: Tuesday Jun 27 11:14:34 2023

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       © 2003-2023 GRASS Development Team, GRASS GIS 8.3.0 Reference Manual