1wxGUI.vnet(1)                 Grass User's Manual                wxGUI.vnet(1)
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wxGUI Vector Network Analysis Tool

KEYWORDS

7       vector, network, vector
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DESCRIPTION

10       Vector Network Analysis Tool is graphical front-end for v.net* modules.
11       It allows perform network analysis directly in wxGUI  without  need  to
12       use command line. The tool can be launched from Layer Manager menu Vec‐
13       tor → Network analysis → Vector network  analysis  tool  or
14       from  Map  Display  toolbar Analyse map → Vector network analysis
15       tool .
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17       Subsets for nearest centers (v.net.alloc)
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19       Vector Network Analysis Tool currently allows you to:
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21           ·   perform these network analyses:
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23               ·   Shortest path (v.net.path)
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25               ·   Salesman (v.net.salesman)
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27               ·   Flow (v.net.flow)
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29               ·   Allocate subnets for nearest centers (v.net.alloc)
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31               ·   Steiner  tree  for  the   network   and   given   terminals
32                   (v.net.distance)
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34               ·   Splits net by cost isolines (v.net.iso)
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36           ·   show  and  set  all  data  needed  for  the  analysis  (points,
37               attribute tables, compute costs)
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39           ·   show analysis results (maps and it’s attribute tables)
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41           ·   snapping to nodes
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43           ·   browse previous analysis results
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NOTES

46       The tool is split into tabs. Every tab represents some functionality:
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48       Parameters tab
49           It is used for setting vector map and it’s layer on which  analysis
50           will  be  done. Also it is possible to set columns with cost values
51           from attribute table connected to particular layer.
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53       Points tab
54           It manages points, which are used for analysis.
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56       Output tab
57           There is a output console, which shows  information  about  running
58           analysis.
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60       Input tables tab
61           When existing vector map and it’s existing layers are set in Param‐
62           eters tab, this tab is dynamically added. It shows attribute tables
63           of  node and arc layers, which were chosen for analysis. It is also
64           possible to compute cost values in this tab. This can  be  done  by
65           right  mouse  button  click  on column label. Then from pop-up menu
66           choose Add column, where new column for cost values can be created.
67           After  that  by  right mouse button click on the added column label
68           can be chosen item Field calculator. This tool computes  cost  val‐
69           ues.
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71       Result tables tab
72           The  result of vector network analysis is always a vector map. Some
73           vector network analysis results can also include attribute  tables.
74           If  such  a table is connected to the result map, this tab is shown
75           and with it you can browse the data.
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KNOWN ISSUES

78       When some change is done in layer tree of Map Display, temporary vector
79       map  representing  result  of analysis is not rendered (use Show result
80       button in toolbar to render it again).
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SEE ALSO

83        wxGUI
84       wxGUI components
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86       See list of vector network modules.
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88       See also the user wiki page including video tutorial.
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AUTHOR

91       Stepan Turek, Google Summer of Code 2012 (mentor: Martin Landa)
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93       $Date: 2018-10-14 21:39:26 +0200 (Sun, 14 Oct 2018) $
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SOURCE CODE

96       Available at: wxGUI Vector Network Analysis Tool source code (history)
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98       Main index | Wxgui index | Topics index | Keywords  index  |  Graphical
99       index | Full index
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101       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
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105GRASS 7.6.0                                                      wxGUI.vnet(1)
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