v.net.alloc(1)

1v.net.alloc(1)                Grass User's Manual               v.net.alloc(1)
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NAME

6       v.net.alloc   -  Allocate  subnets  for nearest centres (direction from
7       centre).
8       Centre node must be opened (costs >= 0). Costs of centre node are  used
9       in calculation
10

KEYWORDS

12       vector, networking
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SYNOPSIS

15       v.net.alloc
16       v.net.alloc help
17       v.net.alloc  [-g]  input=name  output=name   [type=string[,string,...]]
18       [alayer=integer]     [nlayer=integer]     [afcolumn=string]     [abcol‐
19       umn=string]   [ncolumn=string]  ccats=range  [--overwrite]  [--verbose]
20       [--quiet]
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22   Flags:
23       -g
24           Use geodesic calculation for longitude-latitude locations
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26       --overwrite
27           Allow output files to overwrite existing files
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29       --verbose
30           Verbose module output
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32       --quiet
33           Quiet module output
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35   Parameters:
36       input=name
37           Name of input vector map
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39       output=name
40           Name for output vector map
41
42       type=string[,string,...]
43           Type
44           Arc type
45           Options: line,boundary
46           Default: line,boundary
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48       alayer=integer
49           Layer number
50           Arc layer
51           Default: 1
52
53       nlayer=integer
54           Layer number
55           Node layer
56           Default: 2
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58       afcolumn=string
59           Arc forward/both direction(s) cost column (number)
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61       abcolumn=string
62           Arc backward direction cost column (number)
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64       ncolumn=string
65           Node cost column (number)
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67       ccats=range
68           Category values
69           Categories of centres (points on nodes) to which net will be  allo‐
70           cated, layer for this categories is given by nlayer option
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DESCRIPTION

73       v.net.alloc  allocates subnets for nearest centres (direction from cen‐
74       tre). Centre node must be opened (costs >= 0). Costs of centre node are
75       used  in  calculation. Supported are cost assignments for both arcs and
76       nodes, and also different in both directions  of  a  vector  line.  For
77       areas cost will be calculated along boundary lines.
78

NOTES

80       Center  nodes have to be assigned to vector nodes using v.digit.  Nodes
81       and arcs can be closed using cost = -1.
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EXAMPLE

84
85       # nlayer=1 if no extra table for nodes:
86       v.net.alloc network out=network_alloc ccats=0-13 nlayer=1
87       # the result has to be selected by  category  number  of  the  relevant
88       node:
89       d.vect network_alloc cat=9 col=red
90       d.vect network_alloc cat=11 col=green
91       d.vect network_alloc cat=2492 col=yellow
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93
94       Calculating  subnets  for  7 centre nodes using cost assigned to vector
95       length
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97       v.net.alloc in=vectmap out=vectmap.alloc ccats=1-7
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99
100       Calculating subnets for 7 centre nodes using cost assignments  in  both
101       directions
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103       v.net.alloc  in=vectmap  afcol=INDEX  abcol=INDEXBACK out=vectmap.alloc
104       ccats=1-7
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AUTHOR

111       Radim Blazek, ITC-Irst, Trento, Italy
112
113       Last changed: $Date: 2007-05-02 22:15:58 +0200 (Wed, 02 May 2007) $
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115       Full index
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117       © 2003-2008 GRASS Development Team
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121GRASS 6.3.0                                                     v.net.alloc(1)