r.reclass.area(1grass)

1r.reclass.area(1)             Grass User's Manual            r.reclass.area(1)
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NAME

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

10       raster, statistics, aggregation
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SYNOPSIS

13       r.reclass.area
14       r.reclass.area --help
15       r.reclass.area [-cd]  input=name  output=name  value=float  mode=string
16       [method=string]     [--overwrite]    [--help]   [--verbose]   [--quiet]
17       [--ui]
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19   Flags:
20       -c
21           Input map is clumped
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23       -d
24           Clumps including diagonal neighbors
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26       --overwrite
27           Allow output files to overwrite existing files
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29       --help
30           Print usage summary
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32       --verbose
33           Verbose module output
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35       --quiet
36           Quiet module output
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38       --ui
39           Force launching GUI dialog
40
41   Parameters:
42       input=name [required]
43           Name of input raster map
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45       output=name [required]
46           Name for output raster map
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48       value=float [required]
49           Value option that sets the area size limit (in hectares)
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51       mode=string [required]
52           Lesser or greater than specified value
53           Options: lesser, greater
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55       method=string
56           Method used for reclassification
57           Options: reclass, rmarea
58           Default: reclass
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DESCRIPTION

61       r.reclass.area reclasses a raster map greater or less than a user spec‐
62       ified area size (in hectares).
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64       If  the  -c  flag  is  used, r.reclass.area will skip the creation of a
65       clumped raster and assume that the input raster is already clumped.
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EXAMPLES

68       In this example, the ZIP code map in the North Carolina sample  dataset
69       location  is  filtered for large areas (removing smaller areas from the
70       map):
71       g.region raster=zipcodes -p
72       r.report zipcodes unit=h
73       # extract only areas greater than 2000 ha, NULL otherwise:
74       r.reclass.area input=zipcodes output=zipcodes_larger2000ha \
75                      mode=greater value=2000
76       r.report zipcodes_larger2000ha unit=h
77       In this example, the ZIP code map in the North Carolina sample  dataset
78       location  is  filtered for smaller areas which are substituted with the
79       value of the respective adjacent area with largest shared boundary:
80       # reclass by substitutional removing of areas minor of 1000 ha
81       r.reclass.area input=zipcodes output=zipcodes_minor1000ha \
82                      mode=lesser value=1000 method=rmarea
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AUTHORS

88       NRCS,
89       Markus Neteler
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91       Last changed: $Date: 2015-11-20 07:00:52 +0100 (Fri, 20 Nov 2015) $
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SOURCE CODE

94       Available at: r.reclass.area source code (history)
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96       Main index | Raster index | Topics index | Keywords index  |  Graphical
97       index | Full index
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99       © 2003-2019 GRASS Development Team, GRASS GIS 7.4.4 Reference Manual
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103GRASS 7.4.4                                                  r.reclass.area(1)