1r.object.geometry(1)        GRASS GIS User's Manual       r.object.geometry(1)
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NAME

6       r.object.geometry  - Calculates geometry parameters for raster objects.
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KEYWORDS

9       raster, statistics, reclass, clumps
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SYNOPSIS

12       r.object.geometry
13       r.object.geometry --help
14       r.object.geometry  [-m]  input=name  [output=name]   [separator=charac‐
15       ter]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]
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17   Flags:
18       -m
19           Use meters as units instead of cells
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21       --overwrite
22           Allow output files to overwrite existing files
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24       --help
25           Print usage summary
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27       --verbose
28           Verbose module output
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30       --quiet
31           Quiet module output
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33       --ui
34           Force launching GUI dialog
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36   Parameters:
37       input=name [required]
38           Name of input raster map
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40       output=name
41           Name for output file
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43       separator=character
44           Field separator
45           Special characters: pipe, comma, space, tab, newline
46           Default: pipe
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DESCRIPTION

49       r.object.geometry calculates form statistics of raster objects  in  the
50       input  map and writes it to the output text file (or standard output if
51       no output filename or ’-’ is given), with fields separated by the  cho‐
52       sen  separator.   Objects  are defined as clumps of adjacent cells with
53       the same category value (e.g. output of r.clump or i.segment).
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55       By default, values are in pixels. If values in meters is  desired,  the
56       user  can set the -m flag. If the current working region is in lat-long
57       or has non-square pixels, using meters is recommended.
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59       Statistics currently calculated are exactly the same as in v.to.db (ex‐
60       cept for compact_square and mean coordinates):
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62           •   area
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64           •   perimeter
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66           •   compact_square   (compactness   compared   to  a  square:  com‐
67               pact_square = 4 * sqrt(area) / perimeter)
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69           •   compact_circle (compactness compared to a circle:  compact_cir‐
70               cle = perimeter / ( 2 * sqrt(PI * area) ))
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72           •   fractal  dimension  (  fd  =  2 * ( log(perimeter) / log(area +
73               0.001) ) )
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75           •   mean x coordinate of object (in map units)
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77           •   mean y coordinate of object (in map units)
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EXAMPLE

80       g.region raster=soilsID
81       r.object.geometry input=soilsID output=soils_geom.txt
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SEE ALSO

84        i.segment, r.clump, v.to.db
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AUTHORS

87       Moritz Lennert
88       Markus Metz (diagonal clump tracing)
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SOURCE CODE

91       Available at: r.object.geometry source code (history)
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93       Accessed: Saturday Jan 21 20:38:45 2023
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95       Main index | Raster index | Topics index | Keywords index  |  Graphical
96       index | Full index
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98       © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
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102GRASS 8.2.1                                               r.object.geometry(1)
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