1r.basins.fill(1)              Grass User's Manual             r.basins.fill(1)
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NAME

6       r.basins.fill   -  Generates  a raster map layer showing watershed sub‐
7       basins.
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KEYWORDS

10       raster
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SYNOPSIS

13       r.basins.fill
14       r.basins.fill help
15       r.basins.fill number=integer  c_map=string  t_map=string  result=string
16       [--overwrite]
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18   Flags:
19       --overwrite
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21   Parameters:
22       number=integer
23           Number of passes through the dataset
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25       c_map=string
26           Coded stream network file name
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28       t_map=string
29           Thinned ridge network file name
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31       result=string
32           Name for the resultant watershed partition file
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DESCRIPTION

35       r.basins.fill  generates  a raster map layer depicting subbasins, based
36       on input raster map layers for the coded  stream  network  (where  each
37       channel  segment has been "coded" with a unique category value) and for
38       the ridges within a given watershed.  The raster  map  layer  depicting
39       ridges  should  include  the  ridge  which defines the perimeter of the
40       watershed.  The coded stream network can be generated as  part  of  the
41       r.watershed  program,  but the map layer of ridges will need to be cre‐
42       ated by hand, either through digitizing done in v.digit.
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44       The resulting output raster map layer will code the subbasins with cat‐
45       egory  values  matching  those  of the channel segments passing through
46       them.  A user-supplied number of passes through the data is made in  an
47       attempt  to  fill  in these subbasins.  If the resulting map layer from
48       this program appears to have  holes  within  a  subbasin,  the  program
49       should be rerun with a higher number of passes.
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NOTES

52       The  current  geographic  region setting is ignored.  Instead, the geo‐
53       graphic region for the entire input stream's map layer is used.
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SEE ALSO

56       See       Appendix        A        of        the        GRASS        <a
57       href="http://grass.itc.it/gdp/raster/r.watershed.ps">Tutorial: r.water‐
58       shed for further details on  the  combined  use  of  r.basins.fill  and
59       r.watershed.
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61       r.watershed, v.digit
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AUTHORS

64       Dale White, Dept. of Geography, Pennsylvania State University
65       Larry Band, Dept. of Geography, University of Toronto, Canada
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67       Last changed: $Date: 2005/05/02 00:53:49 $
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69       Full index
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73GRASS 6.2.2                                                   r.basins.fill(1)