xenial (1) r.reclass.area.1grass.gz

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
       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

SEE ALSO

        r.reclass, r.clump, r.stats

AUTHORS

       NRCS,
       Markus Neteler

       Last changed: $Date: 2015-11-20 07:01:25 +0100 (Fri, 20 Nov 2015) $

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