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r.reclass.area(1grass) | Grass User's Manual | r.reclass.area(1grass) |
NAME¶
r.reclass.area - Reclasses a raster map greater or less than user specified area size (in hectares).KEYWORDS¶
raster, statistics, aggregationSYNOPSIS¶
r.reclass.arear.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=hIn 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.statsAUTHORS¶
NRCS,Markus Neteler
Last changed: $Date: 2015-11-20 07:00:52 +0100 (Fri, 20 Nov 2015) $
SOURCE CODE¶
Available at: r.reclass.area source code (history)Main index | Raster index | Topics index | Keywords index | Graphical index | Full index
© 2003-2016 GRASS Development Team, GRASS GIS 7.2.0 Reference Manual
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